Why does CAS 7632-00-0 appear in more than one EU cosmetic annex?

A substance identified by CAS 7632-00-0 may appear in multiple EU cosmetic regulation annexes when it is subject to different conditions in different contexts — for example, restricted under Annex III with specific conditions, while also appearing in Annex IV as an approved colorant under separate entry conditions. Each entry must be reviewed individually.

How do I check if my formula contains a substance with CAS 7632-00-0?

Use the INCI Checker on CosIng Checker with INCI names, CAS numbers or EC numbers. Paste CAS 7632-00-0 to screen it directly, then review every linked annex record and supplier document.

CAS 1 record

CAS 7632-00-0

Q: How do I use CAS 7632-00-0 for compliance screening?

Cross-reference CAS 7632-00-0 against your raw material specification sheets and CoA documents. When it appears in Annex II, verify absence. When it appears in Annex III, verify that concentration limits and product type conditions are met. All annex entries sharing this CAS number are listed on this page.

CAS 7632-00-0 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 7632-00-0

CAS 7632-00-0PubChem CID 23668193

Sodium Nitrite

Sodium nitrite is an inorganic sodium salt having nitrite as the counterion. Used as a food preservative and antidote to cyanide poisoning. It has a role as an antihypertensive agent, a poison, an antimicrobial food preservative, a food antioxidant and an antidote to cyanide poisoning. It is an inorganic sodium salt and a nitrite salt. — ChEBI

IUPAC name: sodium nitrite

Molecular formula: NNaO2
Molecular weight: 68.995 g/mol
Exact mass: 68.98267252 Da
Topological polar surface area: 52.5 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 3
Covalent units: 2
Defined stereocentres: 0

Also known as

Nitrous acid, sodium saltNitrite, sodiumErinitritFilmerineNatrium nitritNitrito sodicoAnti-rustNitrite de sodium

16 more reported names

Natrum nitrosumAzotyn sodowyDusitan sodnySynfat 1004Nitrous acid sodaNaNO2Natrii nitrisNCI-C02084INS NO.250M0KG633D4FINS-250Sodium nitrite (USP)Sodium nitrite [USP]NSC-77391CHEBI:78870RefChem:56029

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:78870
ChEMBL:CHEMBL93268
EPA DTXSID:DTXSID0020941
PubMed:39519554
PubMed:33030083
PubMed:31476334
PubMed:28833918
PubMed:28266762
PubMed:28000380
PubMed:26231821
PubMed:25211009
PubMed:25183945
PubMed:23474501
PubMed:21534623
PubMed:20025956

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 7632-00-0

1 total

Annex

III

Entry

SODIUM NITRITE

Sodium nitrite

Not to be used with secondary and/or tertiary amines or other substances forming nitrosamines

231-555-9

Max concentration

How CAS 7632-00-0 is used on this site

CAS 7632-00-0 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 7632-00-0 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 7632-00-0 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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