Skip to main content
CosIng Checker
CosIng Checker
EU cosmetic ingredients, restrictions and safety
Login
Annex II Entry 201 CMR10/11/2010

Hydrazine, its derivatives and their salts

Hydrazine, its derivatives and their salts is listed in Annex II as a prohibited substance for cosmetic products placed on the EU market.

Search similar Back to annex Compare
Prohibited substance— Annex II, EU Regulation 1223/2009
Entry: 201
CMR

Chemical identity and properties

PubChem 2D chemical structure for CAS 302-01-2
CAS 302-01-2PubChem CID 9321

Hydrazine

Hydrazine is a member of hydrazines and an azane. It has a role as an EC 4.3.1.10 (serine-sulfate ammonia-lyase) inhibitor. It is a conjugate base of a hydrazinium(1+). It is a conjugate acid of a hydrazinide. — ChEBI

IUPAC name
hydrazine
Molecular formula
H4N2
Molecular weight
32.046 g/mol
Exact mass
32.037448136 Da
XLogP3
-1.5
Topological polar surface area
52.0 Ų
Hydrogen-bond donors
2
Hydrogen-bond acceptors
2
Covalent units
1
Defined stereocentres
0

Also known as

LevoxineHydrazine baseOxytreat 35Nitrogen hydrideHydrazinHydrazynaHydrazine, anhydrousHydrazine (anhydrous)
16 more reported names
RCRA waste number U133Hydrazine anhydrousAmerzine27RFH0GB4RCHEBI:15571H 70 (FUEL)NITROGEN HYDRIDE (N2H4)RefChem:6443CHEBI:35106206-114-9DiamineDiazaneHydrazyna [Polish]HydrazinesN2H4H2NNH2
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

Hydrazine, its derivatives and their salts

Regulatory information

Regulation

(EC) 2009/1223

See every entry this act set

Identified ingredients

CMR

CategoryCarcinogenicMutagenicReprotoxic
Cat. 1B✓——

Key data

CAS
302-01-2
EC
206-114-9
Annex
II
Entry number
201

Inventory links for Hydrazine, its derivatives and their salts

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

What Annex II means for Hydrazine, its derivatives and their salts

Hydrazine, its derivatives and their salts 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.

This record is linked to 6 CosIng inventory ingredients for name and identifier cross-reference. 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. Hydrazine, its derivatives and their salts 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 302-01-2 is the unique numerical identifier assigned to Hydrazine, its derivatives and their salts 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.

Hydrazine, its derivatives and their salts 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.
Open INCI Checker

Source note for Annex II record Hydrazine, its derivatives and their salts

This page summarizes one Annex II record for Hydrazine, its derivatives and their salts 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 Hydrazine, its derivatives and their salts, but confirm any final regulatory decision against the current official annex wording and source files.

View sourcesView updates

Tools & next steps

Check your formula

Paste a full INCI list to detect Hydrazine, its derivatives and their salts and other flagged EU annex records in one pass.

INCI Checker

Compare entries

Compare Hydrazine, its derivatives and their salts side by side with another annex record to review differences in restrictions, concentrations and annex placement.

Compare

Browse the annex

See all records in Annex II and compare regulatory conditions across substances in this annex.

Open Annex II