{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-12T09:14:24Z",
    "providers": [
      "Codex"
    ],
    "breadth": "recalled by Codex without web access - no source was read",
    "missingProviders": [],
    "pass": 2,
    "cost": {
      "grok": {
        "seconds": 20.1,
        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a094e4-3838-7e71-948c-e7af1b8b9096\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: disodium malonate\nSense to describe: (none recorded)\nDomain code: PHY.MAT\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 043: 10",
        "usd": 0.0,
        "recall": true
      },
      "codex": {
        "seconds": 85.0,
        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a094e4-383e-7da2-9616-91c38e70c8d3\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: disodium malonate\nRegistry id: vr.tr.disodium-malonate\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into this entr"
      }
    },
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-06T12:00:00Z",
      "ingestedAt": "2026-10-06T08:54:24+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "failure_modes_and_hazards",
        "owners",
        "visual_identification"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T10:10:28+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q2211758",
    "registryId": "vr.tr.disodium-malonate",
    "name": "disodium malonate",
    "version": "0.1.0-research.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.MAT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q2211758/",
  "model": {
    "registry_id": "vr.tr.disodium-malonate",
    "name": "disodium malonate",
    "purpose": "Enable an agent to identify disodium malonate, assess its hydration, composition and condition, and determine whether a particular material is suitable for an intended use.",
    "definition": "Disodium malonate is the fully neutralized sodium salt of malonic acid, consisting of two sodium cations per malonate dianion and having the anhydrous formula Na2C3H2O4.",
    "scope_statement": "This model owns the substance identity and material-state requirements of disodium malonate under vr.tr.disodium-malonate in PHY / PHY.MAT, including hydration distinctions and solution behavior without creating separate registry entries.",
    "in_scope": [
      "Disodium malonate identity, sodium-to-malonate stoichiometry and identifier mappings",
      "Anhydrous and hydrated material descriptions, with explicit mass and assay bases",
      "Purity, impurities and evidence supporting grade claims",
      "Solid-state properties, aqueous concentration and acid-base state",
      "Condition-dependent compatibility, handling and use restrictions"
    ],
    "out_of_scope": [
      "Malonic acid, monosodium malonate and other malonate salts as independent substances",
      "Malonate esters and other covalently modified derivatives",
      "Manufacturing processes and production equipment",
      "Commercial reagent products, packaging and procurement records beyond links to material evidence",
      "Complete formulations, experimental protocols and biological systems containing malonate"
    ],
    "distinguishing_features": [
      "Require two sodium equivalents per malonate unit: the reference formula is C3H2Na2O4, distinguishing the disodium salt from a partly neutralized material. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/8865)",
      "Confirm the malonate carbon skeleton and carboxylate functionality analytically; a similar name or white appearance cannot distinguish it from other sodium carboxylates.",
      "Measure water content and establish hydration before interpreting weighed mass; PubChem also records a hydrated composition as CID 2735073. [PubChem hydrate record](https://pubchem.ncbi.nlm.nih.gov/compound/2735073)",
      "Resolve the label against structure and identifiers: CAS 141-95-7 and EC 205-514-0 are listed for disodium malonate by TCI. [TCI](https://www.tcichemicals.com/GB/en/p/M0031)",
      "Distinguish supplied disodium salt identity from the protonation distribution in a prepared solution; record solution pH and added acid or base."
    ],
    "characteristics": [
      {
        "name": "Substance identity",
        "kind": "category",
        "unit_or_values": "Disodium malonate; reference formula C3H2Na2O4; PubChem CID 8865",
        "why_it_matters": "Anchors recognition and identifier reconciliation. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/8865)"
      },
      {
        "name": "Sodium-to-malonate ratio",
        "kind": "measurement",
        "unit_or_values": "mol/mol; nominal stoichiometric ratio 2",
        "why_it_matters": "Supports discrimination from partially neutralized material and detects composition inconsistencies."
      },
      {
        "name": "Hydration and water content",
        "kind": "measurement",
        "unit_or_values": "mol H2O per mol salt and mass % water, with method",
        "why_it_matters": "Controls formula-mass selection and separates bound water from adventitious moisture."
      },
      {
        "name": "Formula-mass basis",
        "kind": "measurement",
        "unit_or_values": "g/mol; 148.02 for the anhydrous reference composition",
        "why_it_matters": "Enables defensible mass-to-amount conversion when hydration and purity are known. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/8865)"
      },
      {
        "name": "Assay and impurity profile",
        "kind": "measurement",
        "unit_or_values": "mass %, dry or as-received basis; impurity concentrations in mg/kg",
        "why_it_matters": "Separates malonate content from water, excess neutralizing reagent and other contaminants."
      },
      {
        "name": "Physical condition",
        "kind": "state",
        "unit_or_values": "Phase, appearance, caking and dissolution residue at recorded temperature and humidity",
        "why_it_matters": "Supports comparison with the applicable specification and detection of changes during storage."
      },
      {
        "name": "Solubility",
        "kind": "measurement",
        "unit_or_values": "g/L or mol/L, with solvent, temperature, pH and reporting basis",
        "why_it_matters": "Determines whether a requested preparation is feasible and interprets undissolved material."
      },
      {
        "name": "Solution composition",
        "kind": "measurement",
        "unit_or_values": "Total malonate mol/L, sodium mol/L and pH at specified temperature",
        "why_it_matters": "Keeps analytical concentration distinct from protonation state and sodium contributed by other reagents."
      },
      {
        "name": "Thermal events",
        "kind": "measurement",
        "unit_or_values": "°C with pressure, atmosphere, method and event assignment",
        "why_it_matters": "Prevents dehydration or decomposition from being reported as melting or boiling."
      },
      {
        "name": "Applicable safety and regulatory evidence",
        "kind": "relation",
        "unit_or_values": "Links to form-specific SDS, jurisdictional records and exposure-limit sources with dates",
        "why_it_matters": "Supports handling decisions without treating missing classifications as evidence of harmlessness."
      }
    ],
    "affordances": [
      "Reconcile a material label with the disodium malonate structure and appropriate identifiers.",
      "Calculate a required mass or delivered malonate amount using verified hydration and assay bases.",
      "Assess whether a lot meets a specified purity, water-content and impurity requirement.",
      "Evaluate a proposed solution concentration against measured solubility and required pH.",
      "Flag material changes or compatibility uncertainties that require testing before use.",
      "Retrieve applicable handling and disposal requirements for the material form and intended operation."
    ],
    "agent_conduct": {
      "may": [
        "Describe disodium malonate and its laboratory and industrial uses from chemical sources.",
        "Report hazard and handling information from safety data sheets."
      ],
      "must_not": [
        "Advise using it in food, medicine or cosmetics without regulatory approval for that use.",
        "Advise handling it without the precautions on its safety data sheet.",
        "Confuse it with malonic acid or its esters when stating hazards."
      ],
      "requires_human": [
        "Approving its use or disposal at a site."
      ]
    },
    "ethics": {
      "considerations": [
        "It is a routine reagent; the stakes are worker safety and honest labelling.",
        "Malonate inhibits a key metabolic enzyme, which matters in research claims."
      ],
      "affected_parties": [
        "Laboratory workers",
        "Researchers"
      ]
    },
    "owners": {
      "steward": "The laboratory or operator who holds it.",
      "master_systems": [
        "Chemical substance registries"
      ]
    },
    "visual_identification": [
      "A white crystalline powder, usually supplied in labelled laboratory containers."
    ],
    "failure_modes_and_hazards": [
      "Dust may irritate the eyes and airways."
    ],
    "what_it_is_for": [
      "Disodium malonate is encountered as a laboratory reagent in chemical and biochemical research.",
      "It supplies malonate ions in solution for applications such as enzyme inhibition studies and coordination chemistry, with suitability depending on purity and hydration state."
    ],
    "standards_and_regulation": [
      "Regulation (EC) No 1907/2006, issued by the European Parliament and the Council of the European Union, governs applicable registration and chemical supply obligations for this substance in the European Union.",
      "Regulation (EC) No 1272/2008, issued by the European Parliament and the Council of the European Union, governs classification, labelling and packaging when this substance is supplied within its scope."
    ]
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q2211758: disodium malonate",
      "url": "https://www.wikidata.org/wiki/Q2211758",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Disodium malonate",
      "url": "https://en.wikipedia.org/wiki/Disodium_malonate",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "identity-and-neutralization",
        "name": "Identity and neutralization",
        "description": "Establish what qualifies as disodium malonate and how documentary identity relates to measured composition.",
        "rationale": "The name sodium malonate alone may leave neutralization and hydration insufficiently specified.",
        "layers": [
          {
            "id": "chemical-identity",
            "name": "Chemical identity",
            "description": "Recognize the malonate unit and its sodium stoichiometry.",
            "findings": [
              {
                "id": "disodium-salt-recognition",
                "name": "Disodium salt recognition",
                "description": "Require evidence for malonate identity and two sodium equivalents rather than relying solely on the reagent name.",
                "questions": [
                  {
                    "text": "What structural or analytical evidence identifies malonate rather than a different carboxylate?",
                    "kind": "definition",
                    "id": "disodium-salt-recognition-q01"
                  },
                  {
                    "text": "Does the measured sodium-to-malonate ratio support the disodium composition?",
                    "kind": "measurement",
                    "id": "disodium-salt-recognition-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "identifier-boundaries",
            "name": "Identifier boundaries",
            "description": "Connect registry identity to external identifiers without conflating chemical forms.",
            "findings": [
              {
                "id": "form-aware-identifier-mapping",
                "name": "Form-aware identifier mapping",
                "description": "Record the composition each identifier actually denotes and retain links between the registry substance and documented material forms.",
                "questions": [
                  {
                    "text": "Which authoritative records support the CAS, EC and PubChem identifiers assigned to this material?",
                    "kind": "provenance",
                    "id": "form-aware-identifier-mapping-q01"
                  },
                  {
                    "text": "Does each identifier describe the anhydrous salt, a specified hydrate or an unspecified commercial composition?",
                    "kind": "boundary",
                    "id": "form-aware-identifier-mapping-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "hydration-and-assay",
        "name": "Hydration and assay",
        "description": "Determine how much disodium malonate a material contains and on what mass basis.",
        "rationale": "Water content and assay conventions directly affect weighed quantities and apparent purity.",
        "layers": [
          {
            "id": "water-and-formula-basis",
            "name": "Water and formula basis",
            "description": "Resolve hydration and moisture before selecting a formula mass.",
            "findings": [
              {
                "id": "hydration-assignment",
                "name": "Hydration assignment",
                "description": "Distinguish a supported hydrate assignment from total water content or an unspecified hydrate label.",
                "questions": [
                  {
                    "text": "What water-content and solid-state measurements establish the hydration state of this material?",
                    "kind": "measurement",
                    "id": "hydration-assignment-q01"
                  },
                  {
                    "text": "Which formula mass and water correction should be used for its mass-to-mole conversion?",
                    "kind": "action",
                    "id": "hydration-assignment-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "purity-and-interferences",
            "name": "Purity and interferences",
            "description": "Interpret assay results alongside impurities that can distort them.",
            "findings": [
              {
                "id": "assay-specificity",
                "name": "Assay specificity",
                "description": "Require the analytical method, reporting basis and relevant impurity limits behind any purity claim.",
                "questions": [
                  {
                    "text": "Is the reported assay specific to malonate, and is it expressed on an as-received, dried or anhydrous basis?",
                    "kind": "measurement",
                    "id": "assay-specificity-q01"
                  },
                  {
                    "text": "Could residual acid, alkali, carbonate or other salts interfere with the assay or intended use?",
                    "kind": "boundary",
                    "id": "assay-specificity-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "physical-state-and-stability",
        "name": "Physical state and stability",
        "description": "Describe condition-dependent solid properties and changes during storage or heating.",
        "rationale": "A single appearance or temperature value cannot establish the state of hydrated or moisture-exposed material.",
        "layers": [
          {
            "id": "solid-condition",
            "name": "Solid condition",
            "description": "Assess the observed material against its documented form and storage history.",
            "findings": [
              {
                "id": "condition-change-assessment",
                "name": "Condition change assessment",
                "description": "Record appearance, caking and phase evidence without treating them as stand-alone identity tests.",
                "questions": [
                  {
                    "text": "What physical state and appearance are observed at the recorded temperature and humidity?",
                    "kind": "measurement",
                    "id": "condition-change-assessment-q01"
                  },
                  {
                    "text": "Do changes in water content, caking or analytical results require reassay before weighing or use?",
                    "kind": "action",
                    "id": "condition-change-assessment-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "thermal-behavior",
            "name": "Thermal behavior",
            "description": "Separate reversible physical changes from chemical degradation.",
            "findings": [
              {
                "id": "thermal-event-interpretation",
                "name": "Thermal event interpretation",
                "description": "Attach thermal measurements to the tested hydration state and distinguish dehydration, melting and decomposition.",
                "questions": [
                  {
                    "text": "Which measured thermal events correspond to water loss, melting or decomposition, and under what conditions?",
                    "kind": "measurement",
                    "id": "thermal-event-interpretation-q01"
                  },
                  {
                    "text": "Is a reported boiling point experimentally applicable, or does decomposition prevent a meaningful boiling measurement?",
                    "kind": "boundary",
                    "id": "thermal-event-interpretation-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "solution-state-and-compatibility",
        "name": "Solution state and compatibility",
        "description": "Translate characterized solid material into a specified solution state and evaluate interactions.",
        "rationale": "Hydration-adjusted concentration, pH and added reagents determine what a disodium malonate preparation actually contains.",
        "layers": [
          {
            "id": "dissolution-and-concentration",
            "name": "Dissolution and concentration",
            "description": "Establish whether a target solution can be prepared reproducibly.",
            "findings": [
              {
                "id": "preparation-feasibility",
                "name": "Preparation feasibility",
                "description": "Use condition-specific solubility and corrected substance amount to evaluate a proposed preparation.",
                "questions": [
                  {
                    "text": "What measured solubility applies to the specified solvent, temperature, pH and material form?",
                    "kind": "measurement",
                    "id": "preparation-feasibility-q01"
                  },
                  {
                    "text": "What mass is required for the target total malonate concentration after correcting for hydration and assay?",
                    "kind": "action",
                    "id": "preparation-feasibility-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "protonation-and-interactions",
            "name": "Protonation and interactions",
            "description": "Track changes introduced by pH adjustment and other dissolved species.",
            "findings": [
              {
                "id": "solution-speciation-boundary",
                "name": "Solution speciation boundary",
                "description": "Keep the starting salt identity separate from protonation and any supported complexation or precipitation in the resulting mixture.",
                "questions": [
                  {
                    "text": "What pH and validated equilibrium data support the expected malonate protonation distribution?",
                    "kind": "measurement",
                    "id": "solution-speciation-boundary-q01"
                  },
                  {
                    "text": "Could added acids, bases or metal ions change the required solution state through protonation, complexation or precipitation?",
                    "kind": "boundary",
                    "id": "solution-speciation-boundary-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "use-qualification-and-handling",
        "name": "Use qualification and handling",
        "description": "Connect material evidence to acceptance decisions and applicable safety requirements.",
        "rationale": "Disodium malonate identity alone does not establish suitability for a sensitive application or authorize a particular handling operation.",
        "layers": [
          {
            "id": "application-acceptance",
            "name": "Application acceptance",
            "description": "Translate an intended role into requirements on the supplied salt.",
            "findings": [
              {
                "id": "grade-fitness",
                "name": "Grade fitness",
                "description": "Assess grade through explicit limits on malonate content, sodium contribution, water and relevant contaminants.",
                "questions": [
                  {
                    "text": "What requirements on assay, hydration, impurities and solution pH follow from the intended use?",
                    "kind": "action",
                    "id": "grade-fitness-q01"
                  },
                  {
                    "text": "Which lot-specific certificate or independent measurements demonstrate compliance with those requirements?",
                    "kind": "provenance",
                    "id": "grade-fitness-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "hazards-and-disposition",
            "name": "Hazards and disposition",
            "description": "Resolve handling, exposure and disposal decisions for the identified material and operation.",
            "findings": [
              {
                "id": "applicable-safety-evidence",
                "name": "Applicable safety evidence",
                "description": "Require current evidence matched to the salt form, jurisdiction and operation, including distinctions between solid reagent and prepared mixtures.",
                "questions": [
                  {
                    "text": "Which current SDS and official records establish applicable GHS classifications, exposure limits and regulatory status for this form?",
                    "kind": "provenance",
                    "id": "applicable-safety-evidence-q01"
                  },
                  {
                    "text": "What controls and disposal route apply when weighing the solid or handling a malonate solution containing other reagents?",
                    "kind": "action",
                    "id": "applicable-safety-evidence-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "evidence-and-external-alignment",
        "name": "Evidence and external alignment",
        "description": "What the world already says about this thing, gathered so the model can be checked against it.",
        "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.",
        "layers": [
          {
            "id": "reported-evidence",
            "name": "Reported evidence",
            "description": "Findings from the breadth pass, kept separate from the structural claims.",
            "findings": [
              {
                "id": "evidence-confidence-notes",
                "name": "Check these first",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Confirm hydration state and corresponding CAS, EC and PubChem identifiers before assigning a regulatory identity.",
                  "Check form-specific solubility, thermal behavior, purity and hazard classification against authoritative substance records and the supplier safety data sheet.",
                  "Biochemical inhibition is attributable to malonate; this does not establish a therapeutic use or a product-specific toxicity classification."
                ],
                "questions": [
                  {
                    "id": "evidence-confidence-notes-q01",
                    "text": "Which of these check these first hold for the sense of disodium malonate this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-kinds",
                "name": "Kinds and varieties",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Anhydrous disodium malonate",
                  "Hydrated disodium malonate"
                ],
                "questions": [
                  {
                    "id": "evidence-kinds-q01",
                    "text": "Which of these kinds and varieties hold for the sense of disodium malonate this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-identifiers",
                "name": "Identifiers and schemes",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  {
                    "scheme": "IUPAC nomenclature",
                    "value_or_pattern": "disodium propanedioate",
                    "note": "Identifies the salt with both carboxyl groups deprotonated."
                  },
                  {
                    "scheme": "Molecular formula",
                    "value_or_pattern": "C3H2Na2O4",
                    "note": "Anhydrous composition; hydrated forms additionally contain water of crystallization."
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-identifiers-q01",
                    "text": "Which of these identifiers and schemes hold for the sense of disodium malonate this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-real-world-use",
                "name": "Real-world use",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Laboratory source of malonate ions.",
                  "Biochemical research on competitive inhibition of succinate dehydrogenase by malonate.",
                  "Preparation of malonate-containing solutions for protein crystallization."
                ],
                "questions": [
                  {
                    "id": "evidence-real-world-use-q01",
                    "text": "Which of these real-world use hold for the sense of disodium malonate this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-measurements",
                "name": "Typical measurements",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  {
                    "quantity": "Molar mass, anhydrous salt",
                    "typical_range": "148.03",
                    "unit": "g/mol"
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-measurements-q01",
                    "text": "Which of these typical measurements hold for the sense of disodium malonate this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-failure-modes-and-hazards",
                "name": "Failure modes and hazards",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Unaccounted water of crystallization can cause errors in concentrations calculated from weighed material.",
                  "Confusing disodium malonate with malonic acid or monosodium malonate changes solution pH and neutralization requirements."
                ],
                "questions": [
                  {
                    "id": "evidence-failure-modes-and-hazards-q01",
                    "text": "Which of these failure modes and hazards hold for the sense of disodium malonate this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-neighbours",
                "name": "Neighbouring kinds and how to tell them apart",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  {
                    "name": "Malonic acid",
                    "difference": "The parent dicarboxylic acid has two acidic carboxyl hydrogens rather than two sodium counterions."
                  },
                  {
                    "name": "Monosodium malonate",
                    "difference": "Only one carboxyl group is neutralized, giving one sodium ion per hydrogen malonate anion."
                  },
                  {
                    "name": "Diethyl malonate",
                    "difference": "A covalent diethyl ester of malonic acid rather than an ionic sodium salt."
                  },
                  {
                    "name": "Disodium succinate",
                    "difference": "Its dicarboxylate backbone contains two intervening methylene groups rather than malonate's one."
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-neighbours-q01",
                    "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of disodium malonate this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Which hydrate forms are experimentally established, and how reliably do supplier identifiers distinguish them from anhydrous disodium malonate?",
    "What validated solubility, solution-pH and acid-base data cover the concentrations and temperatures relevant to intended uses?",
    "Which reported thermal constants represent dehydration, melting or decomposition, and is any boiling-point claim defensible?",
    "Which analytical methods distinguish malonate assay from contributions by residual acid, alkali, carbonate and other salts?",
    "What current form-specific hazard classifications, exposure limits and jurisdictional restrictions are supported by authoritative evidence?"
  ],
  "statistics": {
    "bundles": 6,
    "layers": 11,
    "findings": 17,
    "questions": 27
  }
}
