A pyrazole-based dye precursor used in oxidative hair colours.
What it is
1-Hydroxyethyl 4,5-diamino pyrazole sulfate is the sulfate salt of 1-(2-hydroxyethyl)-4,5-diaminopyrazole, an aromatic amine that serves as a dye precursor in oxidative hair colours, where it forms colour molecules together with couplers and an oxidising agent. CosIng lists it as a hair-dyeing ingredient.
Where it is used
Found in permanent (oxidative) hair colours.
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.
Its current regulatory status in the EU is shown in the EU regulation section. Its position on the list does not show the final shade, which depends on the combination of dyes in the product.
Functions
- Hair dyeing
- Imparting color to hair. Hair dyeing preparations may be temporary, semi-permanent, permanent, depending on the length of time the colorant remains on the hair.
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.
Products with this ingredient (6)
- IGORA VIBRANCE 7-42 Mittelblond Beige Asch 60 ml · Schwarzkopf Professional
- Brillance Hårfarge 842 Cashmere Red · CONAXESS TRADE NORGE AS
- Schwarzkopf Brilliance Permanent Hair Colour Dark Amethyst each · Henkel
- Live Urban Metallics U69 Amethyst Chrome · CONAXESS TRADE NORGE AS
- Brillance Hårfarge 872 Intense Red · CONAXESS TRADE NORGE AS
- Palette Salon Colors 4.89 · Henkel