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Annex IV Entry 7 13/08/2020

4-(Phenylazo)resorcinol

CI 11920

4-(Phenylazo)resorcinol appears in Annex IV as a positive-list colorant entry for EU cosmetics.

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Permitted colorant— Annex IV, EU Regulation 1223/2009
Entry: 7

Record details

Colour index or glossary

CI 11920

Chemical name

4-(Phenylazo)resorcinol

Chemical / IUPAC name

4-(Phenylazo)resorcinol

Color

Orange

Regulatory information

Regulation

(EC) 2009/1223

Identified ingredients

Key data

CAS
2051-85-6
EC
218-131-9
Annex
IV
Entry number
7

Inventory links for 4-(Phenylazo)resorcinol

Inventory Restriction reference
Ref 32700

CI 11920

CAS: 2051-85-6
EC: 218-131-9

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

Annex IV 6
Nearby record in the same annex

CI 11725

CAS: 6371-96-6
EC: 228-907-9
Annex IV 8
Nearby record in the same annex

CI 12010

CAS: 6535-42-8
EC: 229-439-8
Annex IV 5
Nearby record in the same annex

CI 11710

CAS: 6486-23-3
EC: 229-355-1
Annex IV 9
Nearby record in the same annex

CI 12085

CAS: 2814-77-9
EC: 220-562-2
Annex IV 4
Nearby record in the same annex

CI 11680

CAS: 2512-29-0
EC: 219-730-8
Annex IV 10
Nearby record in the same annex

CI 12120

CAS: 2425-85-6
EC: 219-372-2
Annex IV 3
Nearby record in the same annex

CI 10316

CAS: 846-70-8
EC: 212-690-2
Annex IV 11
Nearby record in the same annex

CI 12370

CAS: 6535-46-2
EC: 229-440-3
Annex IV 2
Nearby record in the same annex

CI 10020

CAS: 19381-50-1
EC: 243-010-2
Annex IV 12
Nearby record in the same annex

CI 12420

CAS: 6471-51-8
EC: 229-315-3
Annex IV 1
Nearby record in the same annex

CI 10006

CAS: 16143-80-9
EC: 240-299-7

What Annex IV means for 4-(Phenylazo)resorcinol

4-(Phenylazo)resorcinol 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 2 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

  • 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

Yes. 4-(Phenylazo)resorcinol is included in Annex IV of EU Cosmetics Regulation 1223/2009 as a permitted colorant. Only colorants on this positive list may be used to colour cosmetic products in the EU. Check the product type conditions above for any use restrictions.

CAS 2051-85-6 is the unique numerical identifier assigned to 4-(Phenylazo)resorcinol 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.
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Source note for Annex IV record 4-(Phenylazo)resorcinol

This page summarizes one Annex IV record for 4-(Phenylazo)resorcinol 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 4-(Phenylazo)resorcinol, but confirm any final regulatory decision against the current official annex wording and source files.

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