{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-12T09:13:05Z",
    "providers": [
      "Codex"
    ],
    "breadth": "recalled by Codex without web access - no source was read",
    "missingProviders": [],
    "pass": 2,
    "cost": {
      "grok": {
        "seconds": 18.1,
        "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: 01a094e3-1e38-7c40-a526-ee6412438953\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: dipotassium malate\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: 1",
        "usd": 0.0,
        "recall": true
      },
      "codex": {
        "seconds": 78.4,
        "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: 01a094e3-1e2d-7793-94f7-9650a2eec0b1\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: dipotassium malate\nRegistry id: vr.tr.dipotassium-malate\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into this en"
      }
    },
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-06T12:00:00Z",
      "ingestedAt": "2026-10-06T08:52:03+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "failure_modes_and_hazards",
        "owners",
        "standards_and_regulation",
        "visual_identification"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T10:10:30+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q408755",
    "registryId": "vr.tr.dipotassium-malate",
    "name": "dipotassium malate",
    "version": "0.1.0-research.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.MAT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q408755/",
  "model": {
    "registry_id": "vr.tr.dipotassium-malate",
    "name": "dipotassium malate",
    "purpose": "Enable an agent to identify dipotassium malate, assess the composition and condition of a supplied material, and determine whether its grade and evidence support a proposed use.",
    "definition": "Dipotassium malate is the dipotassium salt of malic acid, consisting of two potassium ions per malate dianion and having the anhydrous formula C4H4K2O5.",
    "scope_statement": "This model owns vr.tr.dipotassium-malate in PHY / PHY.MAT: the dipotassium salt of malic acid, including stereochemical identity, hydration, supplied form, analytical quality and use eligibility, while distinguishing the substance from formulations containing it.",
    "in_scope": [
      "Malate identity and the nominal two-potassium-to-one-malate stoichiometry",
      "Stereochemical composition and its correspondence to substance identifiers",
      "Anhydrous, hydrated and dissolved presentations with explicit composition bases",
      "Batch assay, impurities, analytical evidence and storage condition",
      "Grade-specific suitability, handling evidence and jurisdiction-specific identity"
    ],
    "out_of_scope": [
      "Malic acid and potassium hydrogen malate as separate substances",
      "Sodium, calcium and mixed-cation malates",
      "Finished foods, supplements and other formulations containing dipotassium malate",
      "Manufacturing equipment and complete synthesis workflows",
      "Clinical potassium supplementation and patient-specific dosing"
    ],
    "distinguishing_features": [
      "The nominal salt contains two potassium ions per malate dianion; potassium hydrogen malate retains a carboxylic acid proton and has a different potassium-to-malate ratio.",
      "The anhydrous composition is C4H4K2O5, with a formula mass of 210.27 g/mol. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/Dipotassium-malate)",
      "Identification must establish both potassium and malate; detecting either alone does not distinguish this salt from other potassium salts or malates.",
      "An unspecified stereochemical identity does not establish either an L-malate material or a racemic DL-malate material.",
      "A dipotassium malate solution requires separate salt concentration and water content; its total mass cannot be treated as anhydrous salt mass."
    ],
    "characteristics": [
      {
        "name": "Substance identifiers",
        "kind": "category",
        "unit_or_values": "Registry id vr.tr.dipotassium-malate; candidate external mappings CAS 585-09-1 and PubChem CID 164689, subject to form and stereochemistry checks",
        "why_it_matters": "Connects evidence to the correct substance record. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/Dipotassium-malate)"
      },
      {
        "name": "Potassium-to-malate ratio",
        "kind": "measurement",
        "unit_or_values": "mol/mol; nominal value 2 for the dipotassium salt",
        "why_it_matters": "Helps distinguish the neutral salt from potassium hydrogen malate and incompletely neutralized mixtures."
      },
      {
        "name": "Stereochemical composition",
        "kind": "category",
        "unit_or_values": "L; D; DL racemate; measured mixture; unspecified",
        "why_it_matters": "Prevents transferring stereospecific identity or suitability claims to an uncharacterized material."
      },
      {
        "name": "Water and hydration",
        "kind": "measurement",
        "unit_or_values": "Water mass fraction in %; hydrate stoichiometry where established",
        "why_it_matters": "Controls conversion between supplied mass, dry material and anhydrous salt equivalents."
      },
      {
        "name": "Supplied physical form",
        "kind": "state",
        "unit_or_values": "Solid with characterized phase; aqueous solution; other characterized presentation; unknown",
        "why_it_matters": "Determines which sampling, concentration and stability measurements apply."
      },
      {
        "name": "Salt assay",
        "kind": "measurement",
        "unit_or_values": "% by mass, explicitly as supplied, on a dry basis or as anhydrous equivalent",
        "why_it_matters": "Makes purity and dosing calculations interpretable."
      },
      {
        "name": "Solution pH",
        "kind": "measurement",
        "unit_or_values": "Dimensionless pH with concentration, temperature and preparation method",
        "why_it_matters": "Supports assessment of acid-base condition without mistaking pH alone for proof of salt identity."
      },
      {
        "name": "Solubility and thermal behavior",
        "kind": "measurement",
        "unit_or_values": "Solubility in g/L or g/100 g solvent; transition temperatures in °C with pressure, hydration and method",
        "why_it_matters": "Supports preparation and handling while distinguishing dissolution, dehydration, melting and decomposition."
      },
      {
        "name": "Impurity profile",
        "kind": "measurement",
        "unit_or_values": "Analyte-specific mg/kg or % with method and detection limit",
        "why_it_matters": "Separates malate assay from evidence about residual acid, other ions and contaminants."
      },
      {
        "name": "Grade and applicable specification",
        "kind": "relation",
        "unit_or_values": "Linked specification, version, jurisdiction, intended use and batch conformity evidence",
        "why_it_matters": "Chemical identity alone does not establish suitability for food or another controlled use."
      }
    ],
    "affordances": [
      "Reconcile a supplier label with analytical identity and external substance records.",
      "Calculate anhydrous salt equivalents and potassium contribution from verified assay and water content.",
      "Select identity, stereochemical and impurity tests appropriate to the claimed grade.",
      "Assess whether an aqueous preparation meets a specified concentration and pH requirement.",
      "Accept, quarantine or request further evidence for a batch against an identified specification."
    ],
    "agent_conduct": {
      "may": [
        "Identify dipotassium malate from its label and analysis and report its grade.",
        "Explain its use as a food additive and acidity regulator, citing sources."
      ],
      "must_not": [
        "Use a technical grade in food or medicine.",
        "Make health claims for it that no authority has accepted.",
        "Recommend potassium salts to a person with kidney disease or on potassium-sparing medicines without medical advice.",
        "Confuse it with other malate salts when reporting composition."
      ],
      "requires_human": [
        "Adding it to a food or medicine product.",
        "Accepting a lot whose certificate does not match the specification."
      ]
    },
    "ethics": {
      "considerations": [
        "Excess potassium is dangerous for people whose kidneys cannot clear it.",
        "Additive labelling lets consumers make informed choices."
      ],
      "affected_parties": [
        "Consumers with kidney disease",
        "Food producers",
        "Workers handling it"
      ]
    },
    "owners": {
      "steward": "The producer or user that holds the material.",
      "master_systems": []
    },
    "visual_identification": [
      "A white powder or solution that cannot be told from similar salts by sight.",
      "Grade and identity are settled by the certificate of analysis and tests."
    ],
    "failure_modes_and_hazards": [
      "Wrong grade or mislabelled salt used in food.",
      "Potassium overload in vulnerable people."
    ],
    "standards_and_regulation": [
      "Regulation (EC) No 1333/2008 on food additives, European Union, which sets the conditions for using potassium malate as an additive."
    ],
    "what_it_is_for": [
      "Dipotassium malate is encountered in formulation and laboratory work requiring a potassium salt of malic acid.",
      "It can supply malate and potassium in aqueous systems, with suitability depending on purity, water content and stereochemical composition.",
      "Food-related uses of potassium malates require the supplied material to be distinguished from other malate salts and grades."
    ]
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q408755: dipotassium malate",
      "url": "https://www.wikidata.org/wiki/Q408755",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Potassium malate",
      "url": "https://en.wikipedia.org/wiki/Potassium_malate",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "salt-identity",
        "name": "Salt identity",
        "description": "Establishes which potassium salt of malic acid the material represents.",
        "rationale": "The label potassium malate can conceal differences in neutralization state and stereochemistry.",
        "layers": [
          {
            "id": "ionic-composition",
            "name": "Ionic composition",
            "description": "Connects malate identification to potassium content and neutralization state.",
            "findings": [
              {
                "id": "dipotassium-stoichiometry",
                "name": "Dipotassium stoichiometry",
                "description": "Record evidence for the nominal two-potassium-to-one-malate composition and any excess acid or alkali.",
                "questions": [
                  {
                    "text": "What measurements identify malate and establish the potassium-to-malate molar ratio?",
                    "kind": "measurement",
                    "id": "dipotassium-stoichiometry-q01"
                  },
                  {
                    "text": "Could the sample instead be potassium hydrogen malate or a mixture of malic acid and potassium salts?",
                    "kind": "boundary",
                    "id": "dipotassium-stoichiometry-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "stereochemistry-and-records",
            "name": "Stereochemistry and records",
            "description": "Aligns stereochemical evidence with registry and supplier identities.",
            "findings": [
              {
                "id": "stereochemical-specificity",
                "name": "Stereochemical specificity",
                "description": "Keep unspecified, racemic and stereochemically characterized materials distinguishable without creating additional registry entries.",
                "questions": [
                  {
                    "text": "Is the malate L, D, racemic or unspecified, and what evidence supports that designation?",
                    "kind": "provenance",
                    "id": "stereochemical-specificity-q01"
                  },
                  {
                    "text": "Do the cited CAS, PubChem and supplier identifiers describe that same stereochemical and hydration scope?",
                    "kind": "boundary",
                    "id": "stereochemical-specificity-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "physical-form-and-quantity",
        "name": "Physical form and quantity",
        "description": "Separates salt identity from water content, phase and concentration.",
        "rationale": "Supplied mass and nominal formula mass are insufficient to establish the amount of dipotassium malate present.",
        "layers": [
          {
            "id": "water-and-phase",
            "name": "Water and phase",
            "description": "Characterizes solid phases or dissolved presentations.",
            "findings": [
              {
                "id": "hydration-basis",
                "name": "Hydration basis",
                "description": "Distinguish measured total water from an established crystalline hydrate and from solution solvent.",
                "questions": [
                  {
                    "text": "Is water present as solvent, adsorbed moisture or an identified hydrate?",
                    "kind": "definition",
                    "id": "hydration-basis-q01"
                  },
                  {
                    "text": "Which water-content and phase measurements support the assigned form?",
                    "kind": "measurement",
                    "id": "hydration-basis-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "assay-and-concentration",
            "name": "Assay and concentration",
            "description": "Makes quantitative statements comparable across supplied forms.",
            "findings": [
              {
                "id": "salt-equivalent-accounting",
                "name": "Salt equivalent accounting",
                "description": "Express assay and solution strength on explicit bases before calculating salt or potassium quantities.",
                "questions": [
                  {
                    "text": "Is the reported assay expressed as supplied, on a dry basis or as anhydrous dipotassium malate?",
                    "kind": "measurement",
                    "id": "salt-equivalent-accounting-q01"
                  },
                  {
                    "text": "What verified concentration, water content and density, if needed, support conversion from supplied quantity to salt equivalents?",
                    "kind": "action",
                    "id": "salt-equivalent-accounting-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "solution-and-storage-behavior",
        "name": "Solution and storage behavior",
        "description": "Describes condition-dependent dissolution, acid-base behavior and physical change.",
        "rationale": "A named salt does not determine solution pH or establish stable handling conditions for every presentation.",
        "layers": [
          {
            "id": "aqueous-behavior",
            "name": "Aqueous behavior",
            "description": "Records dissolution and pH under specified preparation conditions.",
            "findings": [
              {
                "id": "conditioned-solution-properties",
                "name": "Conditioned solution properties",
                "description": "Keep measured solution properties separate from nominal salt stoichiometry and from assumptions about malate protonation in solution.",
                "questions": [
                  {
                    "text": "What solubility and pH are measured at the stated temperature, concentration and solvent composition?",
                    "kind": "measurement",
                    "id": "conditioned-solution-properties-q01"
                  },
                  {
                    "text": "Does observed pH require investigation of residual malic acid, excess alkali or other formulation components?",
                    "kind": "action",
                    "id": "conditioned-solution-properties-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "thermal-and-storage-condition",
            "name": "Thermal and storage condition",
            "description": "Tracks changes that could invalidate the assigned form or assay.",
            "findings": [
              {
                "id": "form-dependent-stability",
                "name": "Form-dependent stability",
                "description": "Require evidence before assigning thermal constants or interpreting moisture uptake, precipitation or discoloration.",
                "questions": [
                  {
                    "text": "Does an observed thermal event represent dehydration, melting or decomposition, and for which characterized form?",
                    "kind": "measurement",
                    "id": "form-dependent-stability-q01"
                  },
                  {
                    "text": "Which documented storage limits and observed changes require re-assay or quarantine?",
                    "kind": "action",
                    "id": "form-dependent-stability-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "batch-quality",
        "name": "Batch quality",
        "description": "Links compositional claims to representative batch evidence.",
        "rationale": "Correct naming and a high salt assay do not establish the absence of relevant contaminants.",
        "layers": [
          {
            "id": "composition-deviations",
            "name": "Composition deviations",
            "description": "Characterizes departures from the intended potassium-malate composition.",
            "findings": [
              {
                "id": "residuals-and-contaminants",
                "name": "Residuals and contaminants",
                "description": "Select impurity measurements using the claimed grade and production evidence rather than assuming a universal impurity profile.",
                "questions": [
                  {
                    "text": "What limits and results cover residual malic acid, excess alkali, other cations and relevant trace contaminants?",
                    "kind": "measurement",
                    "id": "residuals-and-contaminants-q01"
                  },
                  {
                    "text": "Which production or supplier records justify the selected impurity panel?",
                    "kind": "provenance",
                    "id": "residuals-and-contaminants-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "analytical-traceability",
            "name": "Analytical traceability",
            "description": "Connects identity, assay and impurity results to the material being evaluated.",
            "findings": [
              {
                "id": "representative-batch-evidence",
                "name": "Representative batch evidence",
                "description": "Track batch identity, sampling and methods so a certificate cannot silently substitute for evidence about a different lot or physical form.",
                "questions": [
                  {
                    "text": "Which batch, sampling date and analytical methods support the certificate of analysis?",
                    "kind": "provenance",
                    "id": "representative-batch-evidence-q01"
                  },
                  {
                    "text": "Can the methods distinguish dipotassium malate from related malates and quantify the specified impurities at their limits?",
                    "kind": "measurement",
                    "id": "representative-batch-evidence-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "use-and-handling-eligibility",
        "name": "Use and handling eligibility",
        "description": "Connects the characterized material to applicable use specifications and handling evidence.",
        "rationale": "A food-additive identity or database hazard summary cannot establish unrestricted suitability for every batch and application.",
        "layers": [
          {
            "id": "food-additive-correspondence",
            "name": "Food-additive correspondence",
            "description": "Checks whether the material matches the substance scope of a relevant food-additive record.",
            "findings": [
              {
                "id": "e351-scope",
                "name": "E351 scope",
                "description": "EFSA identifies E351 potassium malate as dipotassium DL-malate; apply that correspondence only with the relevant stereochemical and specification evidence. [EFSA](https://www.efsa.europa.eu/en/call/call-data-re-evaluation-malic-acid-and-malates-e-296-e-350-352-food-additives)",
                "questions": [
                  {
                    "text": "Does this batch match the chemical identity, stereochemical scope and purity requirements of the applicable additive specification?",
                    "kind": "boundary",
                    "id": "e351-scope-q01"
                  },
                  {
                    "text": "Which current jurisdiction-specific provisions cover the proposed food category and use level?",
                    "kind": "action",
                    "id": "e351-scope-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "handling-evidence",
            "name": "Handling evidence",
            "description": "Associates handling decisions with the supplied form and applicable safety documentation.",
            "findings": [
              {
                "id": "presentation-specific-safety",
                "name": "Presentation-specific safety",
                "description": "Record a current safety data sheet and its classification basis for the actual solid or solution rather than inferring safety from the substance name.",
                "questions": [
                  {
                    "text": "What classification and handling instructions does the current safety data sheet give for this composition and jurisdiction?",
                    "kind": "provenance",
                    "id": "presentation-specific-safety-q01"
                  },
                  {
                    "text": "What controls are required for the actual operation, including dust generation, solution splashes or heating?",
                    "kind": "action",
                    "id": "presentation-specific-safety-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": [
                  "The registered name does not settle stereochemistry, hydration state, or grade.",
                  "Check CAS, PubChem and EC identifiers against the exact stereochemical and hydration form.",
                  "Food-use permissions, purity specifications, physical constants and hazard classifications require source verification; none were checked for this recall-only description."
                ],
                "questions": [
                  {
                    "id": "evidence-confidence-notes-q01",
                    "text": "Which of these check these first hold for the sense of dipotassium malate 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": [
                  "Dipotassium L-malate",
                  "Dipotassium D-malate",
                  "Dipotassium DL-malate"
                ],
                "questions": [
                  {
                    "id": "evidence-kinds-q01",
                    "text": "Which of these kinds and varieties hold for the sense of dipotassium malate 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": "dipotassium 2-hydroxybutanedioate",
                    "note": "This name leaves stereochemistry unspecified."
                  },
                  {
                    "scheme": "Molecular formula",
                    "value_or_pattern": "C4H4K2O5",
                    "note": "Anhydrous composition; the formula does not distinguish stereoisomers."
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-identifiers-q01",
                    "text": "Which of these identifiers and schemes hold for the sense of dipotassium malate 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": [
                  "Acidity regulation in food formulations.",
                  "Preparation of malate-containing solutions and buffers."
                ],
                "questions": [
                  {
                    "id": "evidence-real-world-use-q01",
                    "text": "Which of these real-world use hold for the sense of dipotassium malate 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": "Anhydrous molar mass",
                    "typical_range": "210.27",
                    "unit": "g/mol"
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-measurements-q01",
                    "text": "Which of these typical measurements hold for the sense of dipotassium malate 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": "Malic acid",
                    "difference": "The parent acid has two carboxylic acid groups; dipotassium malate has both deprotonated and balanced by potassium ions."
                  },
                  {
                    "name": "Monopotassium malate",
                    "difference": "Contains one potassium ion per hydrogen malate anion, retaining one acidic carboxyl proton."
                  },
                  {
                    "name": "Potassium maleate",
                    "difference": "Derived from maleic acid, which contains a carbon-carbon double bond, rather than the hydroxyl-bearing malic acid."
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-neighbours-q01",
                    "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of dipotassium malate this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Does the authoritative registry source intend stereochemically unspecified dipotassium malate or specifically the DL material, and which EC and other identifiers match that scope?",
    "Which hydrate or solid phases are experimentally established, and what reliable solubility and thermal data apply to each?",
    "Which validated methods best distinguish pure dipotassium malate from acid/salt mixtures and establish stereochemical composition?",
    "Which current grade specifications, impurity limits and jurisdiction-specific use permissions apply to the intended material and application?",
    "What substance-specific exposure limits, if any, and storage or handling requirements are supported by current authoritative evidence?"
  ],
  "statistics": {
    "bundles": 6,
    "layers": 11,
    "findings": 16,
    "questions": 26
  }
}
