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Annex II Entry 1505 CMR30/07/2020

Hydroxylamine

Hydroxylamine is listed in Annex II as a prohibited substance for cosmetic products placed on the EU market.

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Prohibited substance— Annex II, EU Regulation 1223/2009
Entry: 1505
CMR

Chemical identity and properties

PubChem 2D chemical structure for CAS 7803-49-8
CAS 7803-49-8PubChem CID 787

Hydroxylamine

Hydroxylamine is the simplest hydroxylamine, consisting of ammonia bearing a hydroxy substituent. It is an intermediate in the biological nitrification by microbes like bacteria. It has a role as a nitric oxide donor, a nucleophilic reagent, an EC 1.1.3.13 (alcohol oxidase) inhibitor, an EC 4.2.1.22 (cystathionine beta-synthase) inhibitor, a bacterial xenobiotic metabolite, an EC 4.3.1.10 (serine-sulfate ammonia-lyase) inhibitor and an algal metabolite. It is a conjugate acid of a hydroxyazanide and an aminooxidanide. It derives from a hydride of an ammonia. — ChEBI

IUPAC name
hydroxylamine
Molecular formula
H3NO
Molecular weight
33.030 g/mol
Exact mass
33.021463719 Da
XLogP3
-1.2
Topological polar surface area
46.3 Ų
Hydrogen-bond donors
2
Hydrogen-bond acceptors
2
Covalent units
1
Defined stereocentres
0

Also known as

OxammoniumNH2OHazinous acid2FP81O2L9ZCHEBI:15429RefChem:5894232-259-2HYDROXYAMINE
16 more reported names
OxyammoniadihydridohydroxidonitrogenHydroxylamine, 50 wt. % solution in waterHydroxylamine Solution (50 wt. % in H2O)HSDB 579H3NOEINECS 232-259-2arninoalcoholhyroxylamineUNII-2FP81O2L9ZHydroxylaminamino alcoholamino-alcoholhydroxy aminehydroxyl aminehydroxyl-amine
Open full PubChem recordPubChem annotations3D structure image
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.

Record details

Chemical name

Hydroxylamine

Chemical / IUPAC name

Hydroxylamine

Regulatory information

Regulation

(EU) 2019/831

See every entry this act set

CMR

CategoryCarcinogenicMutagenicReprotoxic
Cat. 2✓——

Key data

CAS
7803-49-8
EC
232-259-2
Annex
II
Entry number
1505

Direct matches are limited for this record, so nearby entries from Annex II are shown as well.

Annex II 1504
Nearby record in the same annex

Piperazine

CAS: 110-85-0
EC: 203-808-3
Annex II 1503
Nearby record in the same annex

Cyclohexylamine

CAS: 108-91-8
EC: 203-629-0

What Annex II means for Hydroxylamine

Hydroxylamine is listed as a prohibited substance under Annex II of EU Cosmetics Regulation 1223/2009 and must not be intentionally added. Article 17 separately addresses unintended small quantities that are technically unavoidable under good manufacturing practice and compatible with the Article 3 safety requirement.

Formulators must screen their ingredients and raw materials to ensure none contain this substance. Suppliers should provide documentation confirming absence when requested.

The page also surfaces 12 related annex records with overlapping identifiers, annex logic or naming patterns.

Compliance checklist

  • Verify this substance is absent from all raw materials and finished formulations.
  • Request absence confirmation or CoA from raw material suppliers.
  • Document the screening result in the Product Information File (PIF).
  • This substance has CMR classification. Review the CMR table above and verify current Annex II/III status before use.

Frequently asked questions

Yes. Hydroxylamine is listed in Annex II of EU Cosmetics Regulation 1223/2009 and is prohibited as an intentionally added cosmetic ingredient. Article 17 provides a narrow exception for unintended small quantities that are technically unavoidable under good manufacturing practice, provided the product remains safe under Article 3.

CAS 7803-49-8 is the unique numerical identifier assigned to Hydroxylamine by the Chemical Abstracts Service. In cosmetic compliance work, the CAS number is used to cross-reference the substance across regulatory databases, raw material specifications and safety assessment reports. Multiple EU annex entries may share the same CAS number if the same substance appears under different conditions or in different annexes.

Hydroxylamine has a CMR (carcinogenic, mutagenic or reprotoxic) classification under EU CLP Regulation. Under Article 15 of EU Cosmetics Regulation 1223/2009, CMR substances of category 1A or 1B are prohibited in cosmetics unless specifically permitted. Category 2 CMR substances may be used only if assessed safe by the SCCS. Always verify current annex status and any applicable derogations before use.

Use the INCI Checker tool on this site to paste your full ingredient list (INCI) and scan it against all Annex II–VI entries. The tool highlights any ingredients that match restricted, prohibited or allergen-flagged records. This is useful for rapid compliance screening of finished product formulas or raw material declarations.
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Source note for Annex II record Hydroxylamine

This page summarizes one Annex II record for Hydroxylamine from public European Commission cosmetic materials and adds linked inventory or identifier matches when available.

Use this record page to review Annex II conditions for Hydroxylamine, but confirm any final regulatory decision against the current official annex wording and source files.

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