chloropentamminecobalt chloride
Enable an agent to identify chloropentamminecobalt chloride, assess whether a sample retains its intended coordination composition and purity, and determine evidence-supported handling and experimental uses.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 16 findings · 26 questions
Coordination identity Establish which cobalt-ammine chloride substance the registry entry denotes.
Complex and counterions
Represent the coordination sphere separately from charge-balancing ions.
Chloride role partition
Record [Co(NH3)5Cl]2+ and two chloride counterions explicitly; do not represent the salt as merely cobalt, ammonia and chloride totals.
- Does the identity evidence establish five coordinated ammonia ligands and one coordinated chloride around Co(III)? definition
- Which analytical evidence distinguishes coordinated chloride from counterion chloride without overlooking changes induced by the test? measurement
Names and records
Connect the registry name to external records while retaining structural ambiguity.
Identifier reconciliation
PubChem exposes relevant records under CID 15771825 and CID 159702 with different structural encodings; record this ambiguity rather than silently selecting a canonical representation. [CID 15771825](https://pubchem.ncbi.nlm.nih.gov/compound/15771825), [CID 159702](https://pubchem.ncbi.nlm.nih.gov/compound/159702).
- Which external record most faithfully represents the coordinated cation and counterions intended by this registry entry? provenance
- Which naming variants denote this same salt, and which denote a different ligand or counterion composition? boundary
Sample composition Determine how much of a sample is the intended coordination salt.
Assay and related complexes
Resolve the parent compound from chemically related impurities.
Complex-specific purity
Require an assay basis that can distinguish the intended complex from other cobalt species and residual salts.
- Does the reported purity measure intact [Co(NH3)5Cl]Cl2, total cobalt, or only the absence of other metals? measurement
- What limits on other cobalt ammines, ammonium salts and unreacted cobalt salts are justified by the intended use? action
Water and mass basis
Establish what contributes to a weighed portion besides the parent salt.
Water content correction
Keep measured moisture separate from any demonstrated stoichiometric hydrate and retain the assay reporting basis.
- What water or residual-solvent content was measured, and does the evidence distinguish surface moisture from structural incorporation? measurement
- How should assay and water content modify the mass required for a specified amount of parent complex? action
Physical and analytical state Characterize the solid and its measured properties without assuming that appearance proves identity.
Solid and thermal properties
Record phase evidence and distinguish thermal transitions from chemical destruction.
Phase and thermal event
Associate solid-form and thermal observations with sample composition, measurement conditions and uncertainty.
- What diffraction or other evidence establishes the solid phase and excludes substantial secondary phases? measurement
- Does a reported heating event represent melting, solvent loss or decomposition, and under what atmosphere and heating rate? measurement
Spectral recognition
Use reference measurements to identify the coordination environment.
Reference signature match
Compare measured spectra with authenticated material under matched conditions; retain appearance only as supporting evidence.
- Which authenticated UV-visible, IR or diffraction reference is appropriate for this sample state? provenance
- Which observed differences discriminate this chloride-ligated complex from hexaammine or aquopentaammine alternatives? measurement
Solution speciation and use Track whether preparation and experimental conditions preserve the intended complex.
Dissolution and concentration
Separate nominal salt loading, dissolved concentration and intact-complex concentration.
Conditioned solubility
Record solvent, temperature, acidity, chloride background and equilibration time with dissolution observations.
- What solubility has been measured in the intended medium, and was the dissolved cobalt species identified? measurement
- Does the preparation support a concentration claim for intact [Co(NH3)5Cl]2+ or only for total added cobalt? boundary
Conversion and retention
Assess possible ligand substitution or other transformation under the intended conditions.
Parent-complex persistence
Treat aquation, ligand replacement and oxidation-state change as transformations to investigate, with resulting species linked to neighbouring models.
- What evidence establishes the parent-complex fraction over the intended time, temperature, pH and chloride-concentration range? measurement
- What change in composition or analytical signature requires reanalysis, rejection or recording a transformed species? action
Handling and regulatory evidence Tie operational constraints to this coordination salt, its sample form and applicable rules.
Classification applicability
Establish which hazard records and exposure limits actually apply.
Matched hazard record
Retain the substance identity, product composition, jurisdiction and revision date behind each hazard or exposure claim.
- Which current SDS explicitly matches this salt and the supplied grade, and what classifications does it report? provenance
- Do relevant exposure limits cover this compound or a stated cobalt-compound category, and are concentrations expressed as cobalt? boundary
Operation-specific controls
Translate applicable evidence into conditions for weighing, dissolving, storing and discarding samples.
Permitted operation conditions
Connect intended operations to documented exposure controls, incompatibilities, storage conditions and cobalt-containing waste requirements.
- What documented controls apply to dust generation during weighing and to contact with prepared solutions? action
- Which verified incompatibilities, storage limits and local waste requirements constrain the proposed operation? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
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.
- Which of these check these first hold for the sense of chloropentamminecobalt 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.
- Which of these identifiers and schemes hold for the sense of chloropentamminecobalt 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.
- Which of these real-world use hold for the sense of chloropentamminecobalt chloride this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these typical measurements hold for the sense of chloropentamminecobalt 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.
- Which of these failure modes and hazards hold for the sense of chloropentamminecobalt 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.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of chloropentamminecobalt chloride this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.MAT
What it is Filled
Chloropentamminecobalt chloride, conventionally called pentaamminechloridocobalt(III) chloride, is the coordination salt [Co(NH3)5Cl]Cl2, containing an octahedral cobalt(III) complex with five ammonia ligands and one coordinated chloride, balanced by two chloride counterions.
In scope
- Identity of the chloropentaamminecobalt(III) cation and its two chloride counterions
- Substance identifiers, naming variants and coordination-aware structural representations
- Sample purity, water content and related cobalt-complex impurities
- Physical properties and analytical signatures under recorded conditions
- Solution composition, chemical conversion and retention of the parent complex
- Substance-specific hazard evidence and suitability for intended operations
Out of scope
- General chloride-ion chemistry owned by the broader chloride model
- Separate identities of hexaamminecobalt(III), aquopentaamminecobalt(III) and other cobalt complexes
- Manufacturing or laboratory synthesis procedures as process models
- Commercial packaging, pricing and supplier operations
- Complete formulations or reaction mixtures containing the substance
- General cobalt toxicology and facility waste-management procedures
Why it exists Filled
Enable an agent to identify chloropentamminecobalt chloride, assess whether a sample retains its intended coordination composition and purity, and determine evidence-supported handling and experimental uses.
Distinguishing features Filled
- Require the coordination formula [Co(NH3)5Cl]Cl2: five ammonia ligands and one coordinated chloride distinguish it from hexaamminecobalt(III) chloride. [Supplier identity record](https://www.sigmaaldrich.com/US/en/substance/pentaamminechlorocobaltiiichloride2504413859513).
- Require cobalt in oxidation state +3 and an intact ammine coordination sphere, distinguishing it from cobalt(II) chloride and mixtures of cobalt salts with ammonia.
- Distinguish one coordinated chloride from two counterion chlorides; elemental chloride content alone cannot establish this partition.
- Confirm that the sixth ligand is chloride rather than water or another ligand using coordination-sensitive evidence, rather than relying on colour or total cobalt alone.
- Treat matching elemental formulas or flattened database structures as insufficient proof of identical coordination connectivity.
What robots and AI may and may not do Filled
Must not
- Handle cobalt compounds without the protection the safety data sheet requires.
- Give cobalt compounds to students without proper supervision and protection.
- Dispose of cobalt-containing waste into drains.
- Mislabel the compound or its purity.
Only with a human decision
- Approving disposal of heavy-metal teaching waste.
May
- Explain the cobalt(III) coordination complex as a teaching example in coordination chemistry.
- Report hazards and handling rules from safety data sheets.
Moral aspects Filled
- Cobalt compounds can sensitize skin and lungs and some are suspected carcinogens.
- Teaching laboratories expose students who rely on instructors for safety.
Who is affected
- Students
- Laboratory workers
- Waste handlers
Owners Filled
Steward
The laboratory or business that holds it; chemical safety authorities regulate supply and use.
Links to other meta-models Filled
parent
- Q11173 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.chloropentamminecobalt-chloride
- Wikidata: Q15410877 (https://www.wikidata.org/wiki/Q15410877)
Direct properties required Filled
- Coordination identity: [Co(NH3)5Cl]Cl2; Co(III); five NH3 ligands; one coordinated chloride; two chloride counterions
- External identity mappings: CAS 13859-51-3; EC 237-594-8; mappings require source and review date
- Formula-unit molar mass: 250.44 g/mol for [Co(NH3)5Cl]Cl2
- Parent-complex assay and impurity profile: Mass % or mol %, with analytical method, uncertainty and dry/as-received basis
- Water content and solid form: Measured water mass %; identified crystalline phase; hydration status unknown or established
- Conditioned physical properties: Solubility in g/L or mol/L; density in g/cm3; thermal events in °C; solvent, temperature, pressure and method required
- Coordination-sensitive analytical signature: UV-visible wavelength in nm and molar absorptivity in L mol−1 cm−1; IR bands in cm−1; diffraction reference where available
- Solution integrity: Parent-complex fraction or unresolved; solvent, pH, chloride concentration, temperature and elapsed time
- Hazard and regulatory applicability: Applicable SDS, jurisdiction, revision date, GHS classification and exposure-limit basis; unresolved values explicit
Recognition required Filled
- A reddish-purple crystalline solid.
- Containers labelled with the complex name and formula.
Capabilities and actions required Filled
- Reconcile a sample label and database record with the coordination identity before accepting it into inventory.
- Calculate a weighed amount or nominal solution concentration using verified assay and water content.
- Select analytical comparisons that distinguish the parent complex from related cobalt ammines.
- Evaluate whether solution preparation or storage conditions require renewed speciation checks.
- Assess suitability as a coordination-chemistry reagent against documented purity and stability requirements.
- Derive handling and disposal requirements from an applicable substance or product SDS and local rules.
Hazards and failure modes required Filled
- Skin and respiratory sensitization.
- Toxicity of cobalt compounds.
- Environmental harm from heavy-metal waste.
Standards and interfaces required Filled
- Globally Harmonized System of Classification and Labelling of Chemicals (GHS), United Nations.
Context of use required Filled
- This coordination salt is encountered in inorganic chemistry teaching and research as an example of a cobalt complex with coordinated and counterion chloride.
- It supports studies of coordination structure, ligand substitution and the relationship between composition and spectroscopic behavior.
Sources Filled
- Wikidata item Q15410877: chloropentamminecobalt chloride - identity and sense of the item
- Wikipedia: Chloropentamminecobalt chloride - general description of the item
Open questions
- Which PubChem record should be preferred for this registry entry, and how should coordination information missing from flattened structural encodings be preserved?
- Which primary reference measurements establish the solid phase, diagnostic spectra, solubility and thermal behaviour, including whether meaningful melting or boiling values exist before decomposition?
- What rates and extents of aquation or other conversion occur under intended preparation and storage conditions?
- Which validated assays distinguish parent-complex purity from total cobalt, residual salts and related cobalt complexes, and what acceptance limits suit each intended use?
- What current compound-specific GHS classifications, applicable exposure limits, storage constraints and jurisdictional obligations are supported by authoritative records?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q15410877/spec.json