CI 42090

Official label name (INCI name, EU glossary of cosmetic ingredient names), No 6401

Allowed with restrictions (Annex III)
Colorant allowed under conditions (Annex IV)

CI 42090: Allowed with restrictions, maximum 0.5% in the ready-for-use preparation, only in: Hair dye substance in non-oxidative hair dye products (Annex III, entry 190); colorant allowed under conditions (Annex IV, entry 63), under Regulation (EC) No 1223/2009.

In plain words

What it is used for

Functions declared by manufacturers:

Colorant: colours cosmetics and/or imparts colour to the skin and/or its appendages.

Hair dyeing: colours hair.

What the rules say

Allowed, with restrictions: Annex III sets a maximum concentration and the product types allowed. Ingredient lists do not give quantities, so the concentration cannot be checked on the label.

An ingredient can be used as a colorant only if it appears on the list of Annex IV. CI 42090 is on it with a warning to print.

The text of the annexes

Allowed with restrictions

This entry covers the same substance as CI 42090 (same CAS number in the CosIng inventory): its conditions apply.

Product type: Hair dye substance in non-oxidative hair dye products
Maximum concentration: 0.5%

Entry: Annex III, No 190
Substance: Benzenemethanaminium, N-ethyl-N-[4-[[4-[ethyl-[(3-sulfophenyl)-methyl]-amino]-phenyl](2-sulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-3-sulfo, inner salts, disodium salt and its ammonium and aluminium salts (15); Acid Blue Acid Blue 9 Ammonium salt; CI 42090. (see note 17)
Glossary names: ACID BLUE 9
CAS: 3844-45-9 - 2650-18-2 - 68921-42-6
EC: 223-339-8 - 220-168-0 - 272-939-6

Dates in the act (3)

Entry into force on 15 May 2013
Application from 11 July 2013
It shall apply from 11 July 2013.
Entry into force on 11 July 2013

Excerpts from the English text published in the Official Journal. A date may concern only some substances of the act: the excerpt says so.

Colorant allowed under conditions

Purity criteria: Purity criteria as sset out in Commission Directive 95/45/EC (E 133)

Entry: Annex IV, No 63
Substance: Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt
Glossary names: CI 42090/ ACID BLUE 9; ACID BLUE 9 AMMONIUM SALT; ACID BLUE 9 ALUMINUM LAKE
CAS: 2650-18-2; 37307-56-5; 3844-45-9
EC: 223-339-8

Dates in the act (10)

Entry into force on 11 January 2010
Application from 1 December 2010
It shall apply from 11 July 2013, with the exception of: — Article 15(1) and (2) which shall apply from 1 December 2010, as well as Articles 14, 31 and 32 to the extent that they are necessary to apply Article 15(1) and (2); and — Article 16(3) second subparagraph, which shall apply from 11 January 2013.
Entry into force on 1 December 2010
Condition applicable from 11 January 2012
As from 11 January 2012, by way of derogation from Directive 76/768/EEC, notification carried out in accordance with Article 13 of this Regulation shall be considered to comply with Article 7(3) and Article 7a(4) of that Directive
Application from 11 January 2013
July 2013, with the exception of: — Article 15(1) and (2) which shall apply from 1 December 2010, as well as Articles 14, 31 and 32 to the extent that they are necessary to apply Article 15(1) and (2); and — Article 16(3) second subparagraph, which shall apply from 11 January 2013.
Entry into force on 11 January 2013
Application from 11 July 2013
It shall apply from 11 July 2013, with the exception of: — Article 15(1) and (2) which shall apply from 1 December 2010, as well as Articles 14, 31 and 32 to the extent that they are necessary to apply Article 15(1) and (2); and — Article 16(3) second subparagraph, which shall appl
Entry into force on 11 July 2013
Placing on the market before 11 July 2013
Article 39 Transitional provisions By way of derogation from Directive 76/768/EEC, cosmetic products which comply with this Regulation may be placed on the market before 11 July 2013.
Placing on the market from 11 July 2013
As from 11 July 2013, a distributor who makes available in a Member State a cosmetic product already placed on the market in another Member State and translates, on his own initiative, any element of the labelling of that product in order to comply with national law, shall submit, by electronic means, the following info

Excerpts from the English text published in the Official Journal. A date may concern only some substances of the act: the excerpt says so.

Identity

CosIng identifier: 32756
CAS (according to CosIng): 2650-18-2, 37307-56-5, 3844-45-9
EC (according to CosIng): 223-339-8
Declared functions: Colorant, Hair dyeing

CosIng cites 3 CAS numbers for this name: it covers several substances.

Elsewhere in the world

Information on other jurisdictions. What is covered, and what is not yet.

United Kingdom (Great Britain)

Allowed with restrictions (Annex III)
Colorant allowed under conditions (Annex IV)

Same entries as in the European Union. Conditions (concentrations, warnings) may differ: they are not compared here.

Switzerland

Regulation (EC) No 1223/2009 applies in Switzerland (Article 54 of the Ordinance on Foodstuffs and Utility Articles).

United States, federal rules

None of the integrated sections of the federal code (21 CFR 700.11 to 700.27 and 250.250) targets this name. The FDA does not publish a list of allowed ingredients.

South Korea

Allowed colorant: 청색 1 호 (브릴리안트블루 FCF, Brilliant Blue FCF) CI 42090 (Brilliant Blue FCF)
색소 고시 별표 1 (allowed colorants), entry 41, page 2.
Conditions, source text, in Korean
비고: 타르색소
Allowed colorant: 청색 205 호 (알파주린 FG, Alphazurine FG)* CI 42090 (Alphazurine FG)
색소 고시 별표 1 (allowed colorants), entry 45, page 2.
Conditions, source text, in Korean
비고: 타르색소

Recorded cosmetics that contain it

1,107 recorded products list it, according to Open Beauty Facts contributors. Records are dated: the formula may have changed. See the list (page in French).

Glossary: Commission Implementing Decision (EU) 2025/1175. Page updated on 21 October 2026.