CAS 1 record

CAS 1336-21-6

CAS 1336-21-6 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 1336-21-6

CAS 1336-21-6PubChem CID 14923

Ammonium Hydroxide

Ammonium hydroxide is a solution of ammonia in water. It has a role as a food acidity regulator. — ChEBI

IUPAC name: azanium hydroxide

Molecular formula: H5NO
Molecular weight: 35.046 g/mol
Exact mass: 35.037113783 Da
Topological polar surface area: 2.0 Å²
Hydrogen-bond donors: 2
Hydrogen-bond acceptors: 1
Covalent units: 2
Defined stereocentres: 0

Also known as

Ammonia waterAmmonia aqueousAquammoniaAmmonia, aquaHousehold ammoniaNH4OHAmmonia, monohydrateAmmonia water 29%

16 more reported names

SX 1 (ammonia water)Ammonium hydroxide ((NH4)(OH))CHEBI:18219Hydroxide, AmmoniumRefChem:6613DTXCID8080921-933-8Ammonium hydrateAmmoniumhydroxidCaswell No. 044ammoniumhydroxideAmmonia, aqueousSX 1Ammonia water [JAN]HSDB 5125EINECS 215-647-6

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External database identifiers

ChEBI:CHEBI:18219
EPA DTXSID:DTXSID4020080
PubMed:27867098
PubMed:14750966
PubMed:1581859

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 1336-21-6

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How CAS 1336-21-6 is used on this site

CAS 1336-21-6 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 1336-21-6 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.