CAS 1 record

CAS 51-81-0

CAS 51-81-0 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 51-81-0

CAS 51-81-0PubChem CID 12231984

3-Aminophenol hydrochloride

IUPAC name: 3-aminophenol;hydrochloride

Molecular formula: C6H8ClNO
Molecular weight: 145.59 g/mol
Exact mass: 145.0294416 Da
Topological polar surface area: 46.3 Å²
Hydrogen-bond donors: 3
Hydrogen-bond acceptors: 2
Covalent units: 2
Defined stereocentres: 0

Also known as

m-Aminophenol HClRefChem:92987200-125-2NQM2XX7XPOPhenol, 3-amino-, hydrochloridem-aminophenol hydrochloride3-aminophenol,hydrochlorideBS-52111

8 more reported names

(3-hydroxyphenyl)azanium;chloridePhenol, 3-amino-, hydrochloride (1:1)3-AMINOPHENOLHYDROCHLORIDEFT-06920723-AMINOPHENOLHYDROCHLORIDDCBCSMXGLXAXDM-UHFFFAOYSA-N3-Aminophenol--hydrogen chloride (1/1)Phenol, 3-aamino-a, hydrochloride (1:1)

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External database identifiers

ChEMBL:CHEMBL376136
EPA DTXSID:DTXSID10892453

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 51-81-0

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How CAS 51-81-0 is used on this site

CAS 51-81-0 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 51-81-0 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.