A blue colorant, also known as Patent Blue V.
What it is
CI 42051 is a synthetic blue dye (Patent Blue V). It is listed in Annex IV of the EU Cosmetics Regulation (allowed colorants).
Where it is used
Shampoos, shower gels, mouthwashes and toothpastes.
Limits of interpretation
The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.
See the EU regulation section for the applicable conditions.
Functions
- Colorant
- Exclusively or mainly intended to colour the cosmetic product, the body as a whole or certain parts thereof, by absorption or reflection of visible light; (precursors of oxidative hair colorants shall be deemed colorants). All authorised colorants are substances in the positive list of Annex IV to the Cosmetics Regulation 1223/2009.
EU regulation
EU · Annex IV, entry 60Ethanaminium, N-(4-((4-(diethylamino)phenyl)(5-hydroxy-2,4-disulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-N-ethylhydroxide, inner salt, calcium salt (2:1) and its insoluble barium, strontium and zirconium lakes, salts and pigments
- Conditions and warnings
- Purity criteria as set out in Commission Directive 95/45/EC (E 131)
- As of
- 3 November 2026 · (EC) 2009/1223
EU · Annex II, entry 1356Ethanaminium, N-(4-((4-diethylamino)phenyl)(5-hydroxy-2,4-disulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-N-ethyl-, hydroxide, inner salt, calcium salt (2:1) (Acid Blue 3; CI 42051) when used as a substance in hair dye products
- As of
- 3 November 2026 · (EC) 2013/344
Products with this ingredient (147)
- Serum Shot Kuracja z 2% kwasu hialuronowego na twarz, szyję i dekolt · Eveline Cosmetics
- Serum Shot Kuracja z niacynamidem na twarz, szyję i dekolt · Eveline Cosmetics
- Perfumowana mgiełka do ciała Night Coquette · Eveline Cosmetics
- Perfumowana mgiełka do ciała Blue Romance · Eveline Cosmetics
- Krem do twarzy nawilżający Hyaluron+ · Eveline Cosmetics
- Serum rozświetlająco-nawilżające · Eveline Cosmetics
- Woda perfumowana, rosemary & chamomile · Vis Plantis
- Woda perfumowana męska, pepper & lavender · Vis Plantis
- Bloody Hell glitter fake blood · Wibo
- wegańska pasta do zębów dla dzieci, 75 ml · Tołpa
- płyn do higieny jamy ustnej ULTRA WHITE, 500 ml · Tołpa
- płyn do higieny jamy ustnej EXTRA FRESH, 500 ml · Tołpa

