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INCI name

CI 10316

Naphthol Yellow S (CI 10316)

ColorantHair dyeingreviewed

A yellow nitro colorant regulated in Annex IV.

What it is

CI 10316 is the Colour Index number of a yellow colorant of the nitro class (disodium 5,7-dinitro-8-oxidonaphthalene-2-sulphonate). CosIng lists it as a colorant and hair-dyeing ingredient. In the EU it is listed in Annex IV (colorants); according to that entry it must not be used in eye products.

Where it is used

Used to colour cleansing products, soaps, bath products and hair colouring products.

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. Colorants are named by CI number and may appear in any order.

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.
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

EU · Annex IV, entry 3Disodium 5,7-dinitro-8-oxidonaphthalene-2-sulphonate and its insoluble barium, strontium and zirconium lakes, salts and pigments
Maximum concentration
Not to be used in eye products
As of
3 November 2026 · (EC) 2009/1223
EU · Annex III, entry 214Disodium 5,7-dinitro-8-oxido-2- naphthalenesulfonate CI 1036
Product type
(a) Hair dye substance in oxidative hair dye products (b) Hair dye substance in non-oxidative hair dye products
Maximum concentration
(b) 0,2%
Conditions and warnings
To be printed on the label: Hair colorants can cause severe allergic reactions
As of
3 November 2026 · (EU) 2013/658

Products with this ingredient (31)

Check a full ingredient list