potassium nitrate
Enable an agent to identify potassium nitrate, assess the condition and suitability of a particular lot, and determine compatible handling and use constraints.
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 agent to identify potassium nitrate, assess the condition and suitability of a particular lot, and determine compatible handling and use constraints.
Potassium nitrate (KNO₃) is an inorganic ionic compound composed of potassium and nitrate ions, ordinarily a white crystalline solid that dissolves in water and acts as an oxidizing agent.
It can be Reconcile a label or supplier record with analytical evidence for potassium nitrate identity.; Compare a lot's assay, moisture and impurity results with the specification required for an intended use.; Assess whether storage conditions and neighbouring materials are compatible with its oxidizing character.; Interpret solubility and thermal data using their stated conditions and measurement basis.; Flag wet, contaminated, misidentified or insufficiently documented material for segregation and review.; Identify the applicable handling, transport or disposal requirements from verified jurisdiction-specific evidence..
Distinguishing features
Identification must support potassium cations and nitrate anions in the composition KNO3; detecting nitrate alone cannot distinguish potassium nitrate from sodium nitrate.
An analytical distinction between nitrate and nitrite is required where potassium nitrite substitution or contamination is plausible.
A potassium-nitrate-containing mixture must be distinguished from a lot of the substance with declared impurities; a product name alone does not establish substance identity.
The name saltpetre or saltpeter requires confirmation against chemical identity and composition rather than being accepted as sufficient identification.
White crystalline appearance is compatible with potassium nitrate but cannot distinguish it from visually similar salts.
Scope
+ Chemical identity and traceable substance identifiers
+ Lot-specific potassium nitrate content, moisture, impurities and grade
+ Solid form, dissolution behaviour and thermal stability under stated conditions
+ Oxidizing behaviour, incompatibilities and applicable hazard classifications
+ Evidence supporting suitability for a stated use and disposition of unsuitable material
- Complete fertilizer, food, pharmaceutical or other product formulations containing potassium nitrate
- Potassium nitrite, sodium nitrate and other chemically distinct salts
- Industrial synthesis, mining and purification process models
- Pyrotechnic, propellant and explosive compositions or operating procedures
- Crop nutrient programmes, clinical treatment decisions and food manufacturing recipes
Characteristics
- Chemical identity
- KNO3; verified systematic name and CAS, EC and PubChem identifiers Connects analytical and documentary evidence to potassium nitrate rather than another nitrate or a formulated product.
- Potassium nitrate assay
- Mass percent, with analytical method, uncertainty and as-received or dry basis Establishes substance content and supports comparison with a specified grade.
- Moisture content
- Mass percent, with method and sampling conditions Affects assay interpretation, storage condition and suitability for moisture-sensitive applications.
- Impurity profile
- mg/kg or mass percent for specified impurities, including nitrite and other salts where relevant Impurity limits may determine suitability even when the potassium nitrate assay is acceptable.
- Declared grade
- Supplier-declared grade linked to a named specification and version Grade labels require supporting criteria before they can justify an intended use.
- Physical form and condition
- Crystalline, powdered, granular or dissolved; free-flowing, caked, wet or visibly contaminated Determines which handling and measurement assumptions apply.
- Particle-size distribution
- µm or mm, with distribution, method and sample preparation Helps assess dust generation, handling behaviour and dissolution performance.
- Aqueous solubility
- g KNO3 per 100 g water at a stated temperature Supports assessment of dissolution and crystallization without confusing solvent-based and solution-based concentrations.
- Thermal transitions and decomposition
- °C, with event type, pressure, atmosphere and measurement method Separates melting or solid-state transitions from chemical decomposition and prevents unsupported boiling-point assumptions.
- Hazard and regulatory designation
- Verified classification, jurisdiction, framework, document version and applicable material form Determines which substance-specific handling, labelling and transport constraints actually apply.
- Lot evidence
- Links to supplier, batch identifier, certificate of analysis, safety data sheet and sample results Makes identity and suitability judgments traceable to the material being assessed.
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: 6 bundles · 11 layers · 19 findings · 29 questions.
Chemical identity and boundaries Establishes that the represented substance is potassium nitrate and defines its boundary against similar salts and containing products.
Nitrate detection, appearance and common names are insufficient to establish potassium nitrate identity.
Ionic identity
Connects the formula KNO3 to evidence for potassium and nitrate.
Potassium and nitrate confirmation
Record how both ionic constituents were identified and whether nitrite or alternative counterions were excluded.
- What evidence establishes potassium nitrate rather than sodium nitrate, potassium nitrite or a mixture of salts? definition
- Which analytical method supports identification, and what relevant alternatives can it fail to distinguish? measurement
Names and material boundary
Resolves identifiers, common names and the distinction between substance lots and formulations.
Identifier and product reconciliation
Map verified identifiers to this registry entry while keeping containing products and separately identified substances outside its boundary.
- Which authoritative records establish the CAS number, EC number, PubChem CID and accepted synonyms for this identity? provenance
- Does the represented material constitute a potassium nitrate lot, or a solution or formulation requiring a separate mixture or product model? boundary
Lot composition and grade Describes how much potassium nitrate a lot contains and what evidence supports its declared grade.
A substance name or high assay does not establish acceptable moisture, impurity limits or fitness for every application.
Assay and impurities
Separates potassium nitrate content from moisture and independently measured contaminants.
Composition on a declared basis
Record assay basis and relevant impurity measurements without treating an unspecified purity percentage as a complete composition.
- What are the potassium nitrate assay and moisture content, and are results stated on an as-received or dry basis? measurement
- Which nitrite, chloride, other-salt or trace-element limits are relevant to this lot's intended use, and what results support compliance? measurement
Grade and batch evidence
Links grade claims to specifications and evidence for the actual batch.
Substantiated grade claim
Treat agricultural, technical, reagent or other declared grades as claims requiring a named specification and appropriate lot evidence.
- Which specification and version define the claimed potassium nitrate grade? definition
- Does the certificate of analysis identify this batch and support every criterion needed for the proposed use? provenance
Physical state and transitions Captures potassium nitrate's observed form and the conditions governing dissolution, crystallization and thermal change.
Physical-property values and handling behaviour require explicit temperature, material form and measurement conditions.
Solid form and dissolution
Relates particle condition and aqueous solubility to the represented material.
Conditioned physical properties
Record particle form, caking and solubility with sufficient conditions to interpret their practical meaning.
- What particle-size distribution, moisture condition and degree of caking characterize the potassium nitrate sample? measurement
- What measured solubility applies at the relevant temperature, and is it expressed per mass of water or per mass of solution? measurement
Thermal behaviour
Distinguishes physical transitions from chemical change on heating.
Transition and decomposition evidence
Keep solid-state transition, melting and decomposition observations distinct, including any evidence for nitrite formation or gas evolution.
- Which reported temperatures correspond to solid-state transitions, melting or decomposition, and under what experimental conditions? measurement
- Does a proposed boiling-point value describe an observed event for potassium nitrate, or should the property remain unset because decomposition intervenes? boundary
Oxidizer hazards and handling Connects potassium nitrate's oxidizing behaviour and exposure pathways to evidence-based handling constraints.
Oxidizing behaviour creates compatibility concerns that cannot be inferred from whether the substance itself is combustible.
Oxidizing behaviour and compatibility
Identifies conditions and neighbouring materials that can increase fire or reaction hazards.
Compatibility assessment
Record verified restrictions concerning combustible materials, reducing agents, contamination and heating for the supplied material.
- Which incompatibilities and storage conditions are established by the applicable safety data sheet or other authoritative evidence? provenance
- Do observed contamination, packaging or storage arrangements require segregation or specialist review? action
Exposure and classification
Records applicable hazard designations and exposure controls without transferring unsupported classifications between jurisdictions.
Applicable hazard record
Link hazard statements, exposure information and transport designations to their authority, date and material scope.
- Which GHS implementation and transport classifications apply to this potassium nitrate material in the relevant jurisdiction? provenance
- What exposure controls are supported for its physical form, and are any cited occupational limits substance-specific or general particulate limits? action
Use suitability and disposition Supports decisions about accepting, restricting or disposing of potassium nitrate without absorbing the models of its downstream applications.
Suitability depends on grade, intended use, condition and local requirements; nitrate-containing releases also require contextual assessment.
Intended-use qualification
Compares substance evidence with requirements supplied by the intended application.
Lot-to-use match
Record the evidence supporting a lot's suitability for a stated application and identify unresolved acceptance criteria.
- Which composition, grade and documentation requirements does the intended application impose on potassium nitrate? boundary
- Can this lot be accepted against those requirements, or which missing or failed criteria require restriction? action
Release and material disposition
Connects unwanted or released material to its composition, receiving environment and applicable disposition requirements.
Nitrate release and waste assessment
Record the amount and condition of potassium nitrate requiring disposition, including contaminants and the context of any release.
- What quantity and composition are involved, and could released material reach soil, drainage or surface water? measurement
- Which verified local requirements and material-specific guidance determine the appropriate recovery or disposal route? 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 recall-based information; no sources were consulted.
- Confirm numerical properties against references specifying temperature, purity and measurement basis.
- Check current jurisdiction-specific classifications, food permissions and grade specifications; no occupational exposure limit is asserted here.
- Which of these check these first hold for the sense of potassium 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.
- Fertilizer grade
- Technical grade
- Reagent grade
- Food grade
- Which of these kinds and varieties hold for the sense of potassium 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 - 7757-79-1 - Identifies potassium nitrate.
- PubChem CID - 24434 - Compound identifier for potassium nitrate.
- EC number - 231-818-8 - European chemical inventory identifier.
- UN dangerous goods number - UN 1486 - Transport identifier for potassium nitrate.
- Which of these identifiers and schemes hold for the sense of potassium 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 Globally Harmonized System of Classification and Labelling of Chemicals (GHS): framework for communicating its oxidizing hazard.
- United Nations Recommendations on the Transport of Dangerous Goods, Model Regulations: potassium nitrate is listed as UN 1486, Class 5.1.
- FAO/WHO Joint Expert Committee on Food Additives (JECFA): specifications address potassium nitrate used as a food additive.
- Which of these standards and regulation hold for the sense of potassium 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.
- Supplies potassium and nitrate nitrogen in fertilizers.
- Serves as an oxidizer in black powder and some pyrotechnic compositions.
- Used in certain food-curing applications subject to applicable restrictions.
- Included in some toothpastes formulated for sensitive teeth.
- Used in nitrate salt mixtures for heat transfer and thermal energy storage.
- Which of these real-world use hold for the sense of potassium 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 - 101.10 - g/mol
- Melting point - Approximately 334 - °C
- Solid density near room temperature - Approximately 2.11 - g/cm³
- Water solubility at 20 °C - Approximately 31.6 - g per 100 g water
- Which of these typical measurements hold for the sense of potassium 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.
- Although not itself combustible, it can intensify fire by supporting combustion.
- Contact or contamination with combustible materials or strong reducing agents can create dangerous reactive mixtures.
- Strong heating causes decomposition with oxygen release; a normal boiling point is not an appropriate property to assign.
- Dust may irritate the eyes and respiratory tract.
- Substantial ingestion can cause nitrate toxicity, including methemoglobinemia following conversion to nitrite.
- Which of these failure modes and hazards hold for the sense of potassium nitrate this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Food-additive identification includes E252 in European usage and INS 252 in the Codex numbering system; identifiers do not establish permission for every food use.
- Permitted food uses, purity requirements and maximum levels depend on jurisdiction.
- Local implementations of GHS and dangerous-goods rules determine applicable labeling and transport obligations.
- Which of these regional variation hold for the sense of potassium 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 nitrate - Contains sodium ions rather than potassium ions; its formula is NaNO₃.
- Potassium nitrite - Contains nitrite, NO₂⁻, rather than nitrate, NO₃⁻; its formula is KNO₂.
- Ammonium nitrate - Contains ammonium ions rather than potassium ions and has substantially different thermal and hazard behavior.
- Niter - Names the naturally occurring mineral form of potassium nitrate; the chemical substance also includes manufactured material.
- Black powder - Is a mixture typically containing potassium nitrate, charcoal and sulfur, rather than the individual compound.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of potassium nitrate this model covers, and on what evidence? provenance
What the second pass must settle
- Which authoritative identity records and existing Vercy publications must be checked to confirm identifiers, synonyms and whether this concept already has a canonical model?
- Which grade specifications and impurity limits are relevant to the intended applications, especially for nitrite and trace contaminants?
- Which primary or authoritative sources establish solubility, solid-state transitions, melting and decomposition behaviour with clearly stated conditions?
- Which current jurisdiction-specific GHS, transport, occupational exposure and use restrictions apply to the represented form and grade?
- Which evidence distinguishes ordinary caking or moisture uptake from contamination or degradation requiring rejection or further analysis?