sodium chloride
Enable an agent to recognise sodium chloride, assess a particular material's composition and condition, and determine its suitability for a specified use.
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 recognise sodium chloride, assess a particular material's composition and condition, and determine its suitability for a specified use.
Sodium chloride (NaCl) is an ionic compound composed of sodium and chloride ions in a 1:1 ratio, forming a crystalline solid under ordinary ambient conditions and occurring naturally as the mineral halite.
It can be Verify whether a sample or supplier record supports sodium chloride identity.; Compare lot composition and documentation against a specified grade or intended use.; Calculate the NaCl mass delivered from an assay on a stated moisture basis.; Assess whether particle condition and storage history support reliable dispensing or dissolution.; Plan dissolution into a separately modelled solution using verified purity and solubility information.; Determine handling, storage or disposal actions from material-specific evidence and applicable requirements..
Distinguishing features
Confirm sodium and chloride in a 1:1 molar relationship attributable to NaCl; the presence of either ion alone does not establish sodium chloride identity.
Distinguish crystalline NaCl from dissolved sodium and chloride ions by recording phase, solvent and whether the subject is a substance or a solution.
Distinguish NaCl from potassium chloride and mixed deicing salts through composition testing rather than white colour or granular appearance.
Distinguish a sodium chloride material from a formulated salt product by identifying intentional additives and other constituents.
Treat food, laboratory, industrial and pharmaceutical grades as specifications requiring evidence, not as different chemical identities or interchangeable permissions.
Scope
+ Chemical identity, substance identifiers and distinction from other chlorides or sodium salts
+ NaCl content, moisture, impurities, additives and evidence supporting a declared grade
+ Crystalline form, particle characteristics, phase and condition-dependent properties
+ Dissolution behaviour and suitability as an input to specified applications
+ Lot provenance, storage condition and applicable hazard or regulatory determinations
- Brines, saline preparations and other solutions as complete mixtures or products
- Seasoned, iodised or otherwise formulated table-salt products beyond their relationship to NaCl
- Halite deposits, salt mines and geological resource models
- Salt extraction, refining and chlor-alkali processes as operating systems
- Dietary plans, clinical dosing and patient-specific treatment decisions
Characteristics
- Chemical identity
- NaCl; sodium-to-chloride stoichiometry 1:1 Separates sodium chloride from other sodium compounds, chlorides and mixtures.
- Substance identifier mapping
- Verified CAS, PubChem CID and EC records with source and identity scope Connects the material to reference and regulatory records without confusing products with substances.
- NaCl assay
- Mass percentage with analytical method, uncertainty and dry or as-received basis Supports purity assessment and prevents comparison of incompatible assay bases.
- Water content
- Mass percentage with method; distinguish measured water from loss on drying Affects apparent purity, delivered NaCl mass and material handling.
- Impurity and additive profile
- Constituent-specific mg/kg or mass percentage, detection limits and intentional-addition status Reveals restrictions that a single NaCl assay cannot capture.
- Declared grade and conformity
- Named specification, edition, intended use and supporting lot certificate Determines whether the particular material meets requirements for the proposed application.
- Physical state
- Crystalline solid, molten material or dissolved constituent; temperature and pressure recorded Changes identification methods, handling and the boundary with a solution model.
- Particle size and caking
- Particle-size distribution in µm or mm; caking assessment by stated method Affects flow, dosing, dust generation and dissolution rate.
- Thermophysical reference properties
- Melting and boiling temperatures in °C at stated pressure; crystal density in kg/m³ at stated temperature Supports state assessment while keeping crystal density distinct from bulk packing density.
- Aqueous solubility
- g NaCl per kg water at stated temperature and solution composition Supports dissolution planning and distinguishes equilibrium capacity from dissolution speed.
- Hazard and exposure determination
- Applicable classification, SDS revision, jurisdiction, exposure route and any verified limit with units and averaging period Grounds handling decisions in the actual material and applicable evidence.
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.sodium-chloride
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 19 findings · 29 questions.
NaCl identity and boundaries Establishes what qualifies as sodium chloride and where mixtures, products and geological occurrences begin.
Salt is an ambiguous commercial and everyday name, and detecting sodium or chloride alone is insufficient.
Chemical identity
Connects NaCl composition to analytical evidence and authoritative substance records.
Evidence for NaCl identity
Record evidence sufficient to distinguish NaCl from other salts and coincidental mixtures of sodium-bearing and chloride-bearing constituents.
- What analytical evidence establishes NaCl identity rather than merely detecting sodium and chloride? definition
- Which verified CAS, PubChem and EC records refer to this substance identity? provenance
Substance and product boundary
Separates sodium chloride identity from the identity of a solution, formulation or natural occurrence.
Represented material
Identify whether the subject is NaCl material, a NaCl constituent or a product requiring its own model.
- Is this record about sodium chloride material, NaCl dissolved in a solvent, a formulated salt product or a halite occurrence? boundary
- Which additives, other salts or host materials require a linked mixture, product or geological model? boundary
Purity, grade and lot evidence Captures the composition and documentation that make a particular NaCl lot suitable or unsuitable for use.
The NaCl formula does not establish food, analytical or pharmaceutical suitability.
Assay and constituents
Records NaCl content alongside moisture, impurities and intentional additions.
Composition and reporting basis
Make assay results interpretable by recording methods, reporting bases and constituents not resolved by the assay.
- What is the NaCl mass fraction, and is it reported on a dry or as-received basis using which method? measurement
- What water, other salts, insoluble matter and intentional additives are present, with what detection limits? measurement
Grade conformity
Links a grade claim to a specific specification and evidence for the supplied lot.
Supported grade claim
Treat grade as demonstrated conformity rather than a conclusion drawn from the substance name or assay alone.
- Which specification and edition define the claimed sodium chloride grade, and which lot certificate supports it? provenance
- Which requirements for the proposed use remain untested or unsupported by the supplier's evidence? action
Crystal state and handling condition Describes NaCl phase, crystal properties and the physical condition of bulk material.
The same chemical composition can behave differently when finely divided, caked, wet or heated.
Phase and reference properties
Relates observed state to temperature, pressure and sourced physical properties.
Conditioned phase properties
Record physical constants with their conditions and distinguish reference data from measurements of the actual material.
- What phase is the NaCl in at the recorded temperature and pressure? measurement
- Which sources establish melting point, boiling point and crystal density, with units, conditions and uncertainty? provenance
Particle and storage condition
Tracks characteristics relevant to bulk handling and changes during storage.
Flow and caking evidence
Assess dispensing and dissolution implications from particle size, moisture, agglomeration and packaging history.
- What particle-size distribution, bulk density and caking condition does this lot exhibit? measurement
- Does moisture exposure, packaging damage or contamination require drying, screening, retesting or rejection for the intended use? action
Dissolution and use fitness Supports decisions about using NaCl as a measured input while preserving the boundary with downstream mixtures and processes.
Dissolving sodium chloride requires attention to purity, concentration basis and conditions; shared identity alone does not justify substitution.
Aqueous transfer
Captures information needed to transfer a known amount of NaCl into water.
Dissolution basis
Separate equilibrium solubility, dissolution rate and target concentration when planning a preparation.
- What verified NaCl solubility applies at the intended temperature and in the presence of any other dissolved constituents? measurement
- What material mass delivers the required NaCl amount after correcting for assay and moisture, and which model owns the resulting solution? action
Application acceptance
Evaluates the material against requirements of a named downstream use.
Use-specific acceptance
Determine whether impurities, additives, particle form and conformity evidence permit a proposed application or substitution.
- Which NaCl purity, additive, particle-size and documentation requirements apply to the intended application? boundary
- Can this lot replace the specified sodium chloride material without violating those requirements, and what evidence is missing? action
Hazards, exposure and regulatory context Connects handling decisions to the actual NaCl material, exposure conditions and applicable jurisdiction.
Familiarity with table salt does not establish the handling requirements of every NaCl grade, physical form or application.
Classification and exposure
Records sourced hazard determinations and relevant exposure criteria without inventing a universal classification.
Applicable hazard evidence
Distinguish substance classification, supplier product information and workplace exposure assessments.
- What GHS classification or explicit non-classification is supported for this material under the applicable jurisdiction and current SDS? provenance
- Are any NaCl-specific or applicable particulate exposure limits established, and what routes, units and averaging periods do they cover? measurement
Handling and release decisions
Links material condition and intended activity to storage, exposure control and disposal requirements.
Contextual controls
Determine appropriate actions for dust, heated material, moisture ingress and releases using the actual operating context.
- Which handling and storage controls follow from this lot's physical form, additives, temperature and expected exposure? action
- What receiving-environment constraints and local requirements govern collection, reuse or disposal of spilled NaCl or resulting saltwater? 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.
- Verify current monograph editions, jurisdiction-specific GHS classification and applicable workplace exposure limits before regulatory use.
- Physical values are approximate for pure material; grade specifications require explicit purity, impurity, moisture and intended-use criteria.
- Which of these check these first hold for the sense of sodium chloride this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Food-grade sodium chloride
- Pharmaceutical-grade sodium chloride
- Analytical-reagent-grade sodium chloride
- Industrial-grade sodium chloride
- Which of these kinds and varieties hold for the sense of sodium chloride 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 - 7647-14-5 - Identifies sodium chloride; does not specify grade, purity or formulation.
- PubChem CID - 5234 - Compound identifier for sodium chloride.
- EC number - 231-598-3 - European substance identifier.
- Chemical formula - NaCl - Expresses the ionic stoichiometry rather than a discrete molecule in the crystal.
- Which of these identifiers and schemes hold for the sense of sodium chloride 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 States Pharmacopeia-National Formulary (USP-NF), published by USP, includes a Sodium Chloride monograph for pharmaceutical quality.
- European Pharmacopoeia, published by the European Directorate for the Quality of Medicines & HealthCare, includes a sodium chloride monograph.
- Codex Standard for Food Grade Salt (CXS 150-1985), issued by the Codex Alimentarius Commission, addresses food-grade salt.
- Which of these standards and regulation hold for the sense of sodium chloride this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Food seasoning and preservation.
- Feedstock for chlor-alkali production of chlorine, sodium hydroxide and hydrogen.
- Road deicing through freezing-point depression.
- Regeneration of ion-exchange resins in water softeners.
- Preparation of pharmaceutical saline solutions using suitable purity and controlled manufacturing.
- Which of these real-world use hold for the sense of sodium chloride 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 - 58.44 - g/mol
- Melting point near atmospheric pressure - Approximately 801 - °C
- Boiling point at atmospheric pressure - Approximately 1465 - °C
- Crystal density near room temperature - Approximately 2.16 - g/cm³
- Solubility in water at 20 °C - Approximately 35.9 - g NaCl per 100 g water
- Which of these typical measurements hold for the sense of sodium chloride 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.
- Dust or concentrated solutions can irritate eyes.
- Excessive ingestion can disturb sodium and water balance.
- Chloride-containing solutions can accelerate metal corrosion, including pitting of susceptible alloys.
- Environmental releases can increase freshwater and soil salinity.
- Moisture exposure and impurities can cause caking; unsuitable purity or contamination can make a grade unfit for food or pharmaceutical use.
- Which of these failure modes and hazards hold for the sense of sodium chloride this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Food-salt iodization requirements and permitted additives vary by jurisdiction; these concern the formulated product rather than pure NaCl.
- Pharmaceutical quality requirements depend on the applicable pharmacopoeia and intended use.
- Restrictions on road-salt application and saline discharge vary with local environmental rules.
- Which of these regional variation hold for the sense of sodium chloride 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.
- Halite - Halite is the naturally occurring mineral form of NaCl; sodium chloride identifies the chemical substance regardless of origin.
- Table salt - Table salt is a food product predominantly containing sodium chloride and may also contain iodine compounds or anticaking agents.
- Sodium chloride solution - A solution contains water and dissolved ions at a specified concentration, rather than the pure substance.
- Potassium chloride - Potassium chloride contains potassium instead of sodium and has the formula KCl.
- Salt - In chemistry, salt denotes a broad class of ionic compounds; sodium chloride is one member.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of sodium chloride this model covers, and on what evidence? provenance
What the second pass must settle
- Which authoritative identity records and existing Vercy world models should anchor this entry without duplicating an already covered concept?
- Which reference sources and measurement conditions should establish NaCl melting point, boiling point, density and aqueous solubility?
- Which grade specifications and impurity limits are needed for the intended users, and how should differing assay methods be compared?
- Which jurisdictions and workplace contexts must be researched for hazard classification, exposure limits and disposal requirements?
- Where should the catalogue draw the practical boundary between NaCl with incidental impurities, additive-containing salt products and natural halite material?