Skip to main content
CosIng Checker
CosIng Checker
EU cosmetic ingredients, restrictions and safety
Login
Annex II Entry 101 17/10/2010

Cobalt benzenesulphonate

Cobalt benzenesulphonate 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: 101

Chemical identity and properties

PubChem 2D chemical structure for CAS 23384-69-2
CAS 23384-69-2PubChem CID 21561177

Kobalt-phenylsulfonat

IUPAC name
benzenesulfonate;cobalt(2+)
Molecular formula
C12H10CoO6S2
Molecular weight
373.3 g/mol
Exact mass
372.925074 Da
Topological polar surface area
131.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
6
Covalent units
3
Defined stereocentres
0

Also known as

Cobalt(II) benzenesulfonateBenzenesulfonic acid, cobalt(2+) salt (2:1)
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

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

Record details

Chemical name

Cobalt benzenesulphonate

Regulatory information

Regulation

(EC) 2009/1223

See every entry this act set

Key data

CAS
23384-69-2
EC
—
Annex
II
Entry number
101

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

Annex II 105
Nearby record in the same annex

Convallatoxin

CAS: 508-75-8
EC: 208-086-3
Annex II 96
Nearby record in the same annex

Chloroethane

CAS: 75-00-3
EC: 200-830-5

What Annex II means for Cobalt benzenesulphonate

Cobalt benzenesulphonate 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).

Frequently asked questions

Yes. Cobalt benzenesulphonate 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 23384-69-2 is the unique numerical identifier assigned to Cobalt benzenesulphonate 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.

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 Cobalt benzenesulphonate

This page summarizes one Annex II record for Cobalt benzenesulphonate 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 Cobalt benzenesulphonate, 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 Cobalt benzenesulphonate and other flagged EU annex records in one pass.

INCI Checker

Compare entries

Compare Cobalt benzenesulphonate 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