sodium nitrate
Enable an AI agent to identify sodium nitrate, assess the condition and suitability of a particular lot, and determine which uses or handling actions its evidence supports.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an AI agent to identify sodium nitrate, assess the condition and suitability of a particular lot, and determine which uses or handling actions its evidence supports.
Sodium nitrate is the inorganic ionic compound NaNO3, composed of sodium cations and nitrate anions, ordinarily occurring as a white, water-soluble crystalline solid with oxidizing properties.
It can be Resolve an identity claim against analytical evidence and authoritative substance records.; Compare a lot's assay, moisture, and impurities with the specification for a declared use.; Calculate sodium nitrate quantity from documented lot mass, assay basis, or solution concentration.; Assess whether observed phase, caking, or contamination requires resampling or restricted use.; Select applicable handling and storage instructions from current evidence for the material's form and composition.; Link sodium nitrate used in a formulated product to that product's model without transferring purity or approval claims..
Distinguishing features
Identity evidence must establish sodium cations and nitrate anions in the composition represented by NaNO3; detection of nitrate alone cannot distinguish sodium nitrate from other nitrate salts.
An anion-specific analytical result must distinguish nitrate from nitrite; sodium nitrite is a different substance, and any nitrite present must be recorded separately.
Cation analysis must distinguish sodium nitrate from potassium nitrate and mixed nitrate salts, even when appearance or intended use is similar.
A clear solution or white crystalline appearance is insufficient identification; a sample needs traceable identity evidence and composition appropriate to its physical form.
A product containing sodium nitrate is represented as a mixture or formulated product linked to this substance, rather than automatically treated as a pure sodium nitrate lot.
Scope
+ Chemical identity as the sodium salt of nitrate, including identifiers and distinctions from sodium nitrite and other nitrate salts
+ Lot composition, assay basis, water content, impurities, and documented grade
+ Solid material and aqueous sodium nitrate, with concentration and conditions stated explicitly
+ Condition-dependent physical properties and thermal behavior
+ Evidence governing oxidizer handling, compatibility, storage, and suitability for a declared use
- Finished fertilizers, foods, heat-transfer mixtures, or other products containing sodium nitrate
- Manufacturing plants and detailed sodium nitrate production processes
- Complete models of sodium nitrite, potassium nitrate, nitric acid, or other neighbouring substances
- Food recipes, fertilizer application programs, and process operating procedures
- Deposit geology and environmental nitrogen cycling beyond links needed to explain provenance or release
Characteristics
- Chemical identity
- NaNO3; sodium cation and nitrate anion in a 1:1 formula-unit ratio Defines the substance independently of trade name, source, or intended use.
- Authoritative identifier mapping
- Links to verified CAS, PubChem, EC, and applicable jurisdictional substance records Connects supplier and regulatory records without relying on ambiguous names.
- Sodium nitrate assay
- Mass percent, with analytical method and as-received or dry basis Supports comparisons between lots and prevents water content from silently changing the meaning of purity.
- Water content
- Mass percent, with method and sampling conditions Affects assay interpretation, delivered substance quantity, and solid handling.
- Impurity profile
- mg/kg or mass percent by analyte, including nitrite, other salts, and use-relevant contaminants Distinguishes identity confirmation from fitness for a particular application.
- Physical form
- Crystalline solid, powder, granules, aqueous solution, or molten material; temperature and composition required Determines which handling, concentration, and property evidence applies.
- Aqueous concentration
- Mass percent, mol/kg solvent, or mol/L solution; temperature required where relevant Prevents dilute solutions from being treated as neat substance and supports material accounting.
- Grade and conformity evidence
- Declared grade linked to a named specification, revision, certificate, and lot A supplier grade label alone does not establish compliance with an intended-use requirement.
- Thermal and solubility properties
- Melting or decomposition observations in °C; solubility with explicit units, solvent, temperature, and method Supports phase assessment while avoiding unsupported boiling-point or thermal-stability assumptions.
- Applicable hazard classification
- Verified classes, categories, and statements with jurisdiction, source date, and material composition Connects handling decisions to the actual lot or solution and the applicable classification system.
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 17 findings · 25 questions.
Sodium nitrate identity Establishes that the subject is NaNO3 and preserves the boundary between the substance, neighbouring salts, and mixtures.
Nitrate detection, sodium detection, and a familiar trade name each provide incomplete identity evidence.
Ionic identity
Records evidence for the sodium and nitrate components of the claimed substance.
Sodium and nitrate confirmation
An identity assessment must address both ions and distinguish nitrate from nitrite.
- What evidence establishes that the material is sodium nitrate with formula NaNO3? definition
- Which analytical methods distinguish nitrate from nitrite and sodium from other cations in this sample? measurement
Registry and mixture boundaries
Connects verified external identities to the registry entry and separates substance records from product records.
Identifier and product resolution
Identifier mappings must refer to sodium nitrate, while solutions and formulated products retain their additional composition information.
- Which read and verified CAS, PubChem, and EC records identify the substance represented by vr.tr.sodium-nitrate? provenance
- Is the subject a sodium nitrate lot, an aqueous preparation, or a formulated product requiring a separate linked model? boundary
Lot composition and grade Captures how much sodium nitrate is present, what accompanies it, and which specification the lot demonstrably meets.
Chemical identity alone cannot establish suitability for food, agricultural, laboratory, or industrial use.
Assay, water, and impurities
Makes composition measurements comparable by preserving their basis, method, and sampling context.
Interpretable composition
Assay, water content, and impurity results must be read together, with nitrite reported separately from nitrate.
- What is the sodium nitrate assay, and is it reported on a dry or as-received basis? measurement
- What are the measured water and impurity contents, including nitrite, and what reporting limits apply? measurement
Grade and lot traceability
Relates a claimed grade to the actual batch and the requirements of a declared application.
Documented grade conformity
Grade conformity requires a named specification and evidence traceable to the lot under assessment.
- Which supplier, lot number, certificate, and specification revision support the declared grade? provenance
- Do the available results establish conformity for the proposed use, or must the lot remain unqualified pending additional evidence? action
Phase and physical condition Relates solid, dissolved, and heated sodium nitrate to measured conditions and observed material state.
The same substance identity can describe materials with substantially different concentration, flow, and thermal behavior.
Solid and aqueous state
Records physical form, moisture-related changes, and the concentration basis of solutions.
Form and concentration assessment
State assessment distinguishes dry solids, damp or caked solids, solutions, and preparations containing undissolved material.
- What physical form, temperature, water content, and evidence of caking or undissolved solids characterize the material? measurement
- For an aqueous preparation, what concentration basis and temperature support comparison with a verified sodium nitrate solubility source? measurement
Thermal property evidence
Separates melting observations from decomposition and records the conditions under which each was established.
Melting and decomposition boundary
Thermal records must identify the observed event rather than treating all high-temperature changes as boiling or reversible phase transitions.
- Which sources establish melting and decomposition behavior, with pressure, atmosphere, purity, and method recorded where available? provenance
- Does the material's thermal history require reassessment of composition or suitability before further use? action
Handling and use constraints Connects sodium nitrate's oxidizer-related concerns, exposure evidence, and application requirements to concrete decisions.
A recognized substance and a satisfactory assay still leave handling compatibility and use eligibility unresolved.
Classification and compatibility
Records applicable hazard evidence and evaluates contact with other materials under the proposed conditions.
Oxidizer handling evidence
Handling decisions require verified classification and compatibility guidance applicable to the actual solid or solution.
- Which current safety data and jurisdictional records establish the hazard classification for this form and composition of sodium nitrate? provenance
- What segregation, contamination control, and handling instructions apply to the proposed contact with combustible or reducing materials? action
Exposure and use eligibility
Links the proposed application and exposure pathways to the evidence needed for a permitted action.
Application-specific decision
Use eligibility and exposure controls must be assessed for a stated jurisdiction, application, and material form.
- Which sodium-nitrate-specific or applicable particulate exposure limits and controls are documented for the anticipated exposure pathway? provenance
- Which current application rules and lot qualifications must be satisfied before this sodium nitrate can be used as proposed? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- This is recalled knowledge, with no sources consulted; verify identifiers and numerical properties before publication.
- Check current jurisdiction-specific hazard classifications, food permissions, purity specifications, and occupational exposure requirements.
- Grade names do not establish a universal purity: verify assay, moisture, and impurity limits against the applicable specification.
- Which of these check these first hold for the sense of sodium nitrate this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Technical-grade sodium nitrate
- Fertilizer-grade sodium nitrate
- Food-grade sodium nitrate
- Reagent-grade sodium nitrate
- Which of these kinds and varieties hold for the sense of sodium nitrate this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- CAS Registry Number - 7631-99-4 - Identifies sodium nitrate.
- EC number - 231-554-3 - European chemical inventory identifier.
- PubChem CID - 24268 - Compound record identifier.
- EU food additive E number - E251 - Food additive identity; does not imply unrestricted permission to use.
- UN dangerous goods number - UN 1498 - Transport identity for sodium nitrate, assigned to Class 5.1 oxidizing substances.
- Which of these identifiers and schemes hold for the sense of sodium nitrate this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- United Nations Recommendations on the Transport of Dangerous Goods classify sodium nitrate for transport as an oxidizing substance.
- European Parliament and Council Regulation (EC) No 1333/2008 governs authorized food additive uses of sodium nitrate (E251) in the European Union.
- European Commission Regulation (EU) No 231/2012 specifies purity requirements for authorized food additives, including E251.
- The FAO/WHO Joint Expert Committee on Food Additives (JECFA) publishes food additive specifications for sodium nitrate.
- Which of these standards and regulation hold for the sense of sodium nitrate this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Nitrogen fertilizer supplying nitrate nitrogen.
- Preservative in certain cured foods under applicable use restrictions.
- Oxidizing ingredient in glass manufacture.
- Component of molten nitrate salt mixtures used for heat transfer and thermal energy storage.
- Oxidizing ingredient in some pyrotechnic formulations.
- Which of these real-world use hold for the sense of sodium nitrate this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Molar mass - 84.99 - g/mol
- Melting point - Approximately 308 - °C
- Solid density near room temperature - Approximately 2.26 - g/cm³
- Solubility in water at 20 °C - Approximately 88 - g per 100 g water
- Which of these typical measurements hold for the sense of sodium nitrate this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Oxidizing action can intensify combustion of other materials.
- Contact or contamination with combustible substances or reducing agents can create hazardous reactive mixtures.
- Strong heating causes decomposition, including oxygen release and formation of sodium nitrite; a normal boiling point is therefore not a useful routine property.
- Dust can irritate eyes and respiratory passages.
- Excessive ingestion can cause toxicity, including methemoglobinemia following conversion of nitrate to nitrite.
- Which of these failure modes and hazards hold for the sense of sodium nitrate this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Permitted food categories, maximum use levels, and labeling requirements vary by jurisdiction.
- The historical name Chile saltpeter reflects natural nitrate deposits associated with Chile; it does not establish the origin or purity of a commercial sample.
- Which of these regional variation hold for the sense of sodium nitrate this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Sodium nitrite - Has formula NaNO2 and contains nitrite rather than nitrate; its chemical behavior, toxicity, and permitted food uses differ.
- Potassium nitrate - Has potassium rather than sodium as the cation, giving formula KNO3.
- Ammonium nitrate - Contains ammonium rather than sodium and has substantially different thermal and explosive hazards.
- Nitratine - Names the naturally occurring mineral form of sodium nitrate; sodium nitrate also includes manufactured material.
- Nitrate fertilizer - Names a product category that may contain sodium nitrate, other nitrate salts, or mixtures.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of sodium nitrate this model covers, and on what evidence? provenance
What the second pass must settle
- Which authoritative identifier records should anchor this entry, and do their substance boundaries agree with the supplier records being used?
- What reference values and experimental conditions should be adopted for solubility, melting, and decomposition, and how should conflicting reports be represented?
- Which impurity limits and analytical methods distinguish the grades relevant to the intended applications, particularly for nitrite and trace contaminants?
- Which current hazard classifications, transport provisions, and occupational exposure requirements apply in the target jurisdictions and at the relevant solution concentrations?
- What evidence is sufficient to requalify sodium nitrate after moisture uptake, suspected contamination, or substantial heating?