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CAS 1 record

CAS 7646-79-9

CAS 7646-79-9 matches 1 EU annex record across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 7646-79-9
CAS 7646-79-9PubChem CID 3032536

Cobalt chloride (cocl2)

Cobalt dichloride is a cobalt salt in which the cobalt metal is in the +2 oxidation state and the counter-anion is chloride. It is used as an indicator for water in desiccants. It has a role as a sensitiser, a calcium channel blocker, a two-colour indicator and an allergen. It is a cobalt salt and an inorganic chloride. It contains a cobalt(2+). — ChEBI

IUPAC name
cobalt(2+) dichloride
Molecular formula
Cl2Co
Molecular weight
129.84 g/mol
Exact mass
128.870899 Da
Topological polar surface area
0.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
2
Covalent units
3
Defined stereocentres
0

Also known as

DichlorocobaltCobalt dichlorideCOBALTOUS CHLORIDECobalt muriateCobaltous dichlorideCobaltous chloride anhydrousCobalt(2+) chlorideKobalt chlorid
16 more reported names
Cobaltum muriaticumEVS87XF13WCHEBI:35696Cobalt dichloride (cocl2)NSC-51149CoCl(2)RefChem:54867lambda2-cobalt(2+) ion dichlorideTechnetium Tc-99m Exametazime and Cobaltous Chloride231-589-4Cobalt(II)chlorideCOCl2Cobalt chloride1332-82-7cobalt(2+);dichlorideCl2Co
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External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 7646-79-9

1 total

How CAS 7646-79-9 is used on this site

CAS 7646-79-9 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 1 EU annex record shares this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 7646-79-9 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.

Frequently asked questions

A substance identified by CAS 7646-79-9 may appear in multiple EU cosmetic regulation annexes when it is subject to different conditions in different contexts. For example, a substance might be restricted under Annex III with specific conditions, and the same CAS might also appear in Annex IV as an approved colorant under separate entry conditions. Each entry must be reviewed individually.

Cross-reference the CAS number against your raw material specification sheets and CoA documents. When a CAS appears in Annex II, verify absence. When it appears in Annex III, verify that concentration limits and product type conditions are met in your formulation. All annex entries sharing this CAS number are listed above.

A CAS number is assigned by the Chemical Abstracts Service (USA) and is globally recognised. An EC number is a European Commission identifier from inventories such as EINECS, ELINCS or the NLP list. Both identifiers may appear in EU cosmetic annex entries. Some substances have both, some have only one, and some older entries may have neither.

The INCI Checker accepts ingredient names, CAS numbers and EC numbers. Check this CAS number directly, then verify the result against supplier specification sheets and every linked annex condition.
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