Disodium 2,5-dichloro-4-(5-hydroxy-3-methyl-4-((sulphophenyl)azo)pyrazol-1-yl)benzenesulphonate
CI 18965
Disodium 2,5-dichloro-4-(5-hydroxy-3-methyl-4-((sulphophenyl)azo)pyrazol-1-yl)benzenesulphonate appears in Annex IV as a positive-list colorant entry for EU cosmetics.
Chemical identity and properties
benzenesulfonic acid, 2,5-dichloro-4-(4,5-dihydro-3-methyl-5-oxo-4-((4-sulfophenyl)azo)-1h-pyrazol-1-yl)-, disodium salt
- IUPAC name
- disodium;2,5-dichloro-4-[3-methyl-5-oxo-4-[(4-sulfonatophenyl)diazenyl]-4H-pyrazol-1-yl]benzenesulfonate
- Molecular formula
- C16H10Cl2N4Na2O7S2
- Molecular weight
- 551.3 g/mol
- Exact mass
- 549.9163350 Da
- Topological polar surface area
- 189.0 Ų
- Hydrogen-bond donors
- 0
- Hydrogen-bond acceptors
- 10
- Covalent units
- 3
- Defined stereocentres
- 0
Also known as
16 more reported names
External database identifiers
- ChEMBL:CHEMBL3185287
- EPA DTXSID:DTXSID6041719
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
Colour index or glossary
CI 18965
Chemical name
Disodium 2,5-dichloro-4-(5-hydroxy-3-methyl-4-((sulphophenyl)azo)pyrazol-1-yl)benzenesulphonate
Chemical / IUPAC name
Disodium 2,5-dichloro-4-(5-hydroxy-3-methyl-4-((sulphophenyl)azo)pyrazol-1-yl)benzenesulphonate
Color
Yellow
Regulatory information
Identified ingredients
Key data
Inventory links for Disodium 2,5-dichloro-4-(5-hydroxy-3-methyl-4-((sulphophenyl)azo)pyrazol-1-yl)benzenesulphonate
Related records for Disodium 2,5-dichloro-4-(5-hydroxy-3-methyl-4-((sulphophenyl)azo)pyrazol-1-yl)benzenesulphonate
Direct matches are limited for this record, so nearby entries from Annex IV are shown as well.
CI 19140
What Annex IV means for Disodium 2,5-dichloro-4-(5-hydroxy-3-methyl-4-((sulphophenyl)azo)pyrazol-1-yl)benzenesulphonate
Disodium 2,5-dichloro-4-(5-hydroxy-3-methyl-4-((sulphophenyl)azo)pyrazol-1-yl)benzenesulphonate is an approved colorant listed in Annex IV of EU Cosmetics Regulation 1223/2009. Only colorants on this positive list may be used to colour cosmetic products on the EU market.
Some colorants in Annex IV are restricted by product type — for example, prohibited from use around the eyes or in products applied to mucous membranes. Check the product type and conditions fields above before use.
This record is linked to 1 CosIng inventory ingredient for name and identifier cross-reference. The page also surfaces 12 related annex records with overlapping identifiers, annex logic or naming patterns.
Compliance checklist
- Confirm colorant is used only in permitted product types listed above.
- Record the Colour Index number and CAS identifier in the ingredient declaration.
Frequently asked questions
Source note for Annex IV record Disodium 2,5-dichloro-4-(5-hydroxy-3-methyl-4-((sulphophenyl)azo)pyrazol-1-yl)benzenesulphonate
This page summarizes one Annex IV record for Disodium 2,5-dichloro-4-(5-hydroxy-3-methyl-4-((sulphophenyl)azo)pyrazol-1-yl)benzenesulphonate from public European Commission cosmetic materials and adds linked inventory or identifier matches when available.
Use this record page to review Annex IV conditions for Disodium 2,5-dichloro-4-(5-hydroxy-3-methyl-4-((sulphophenyl)azo)pyrazol-1-yl)benzenesulphonate, but confirm any final regulatory decision against the current official annex wording and source files.
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