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CI 16255

Last update on Mar 13, 2026

CI 16255 is a coloring agent used in cosmetics to impart a red color to the products. It is also known as a red dye or a red colorant. CI 16255 (or Ponceau 4R CI 16255) is, however, a rare ingredient and is not often used in formulations. In cosmetics and skin/hair care products, it serves both aesthetic and functional purposes such as the dying of hair. The chemical formula of CI 16255 is C20H11N2Na3O10S3. It is also known by other names such as Acid Red 18, E 124, Ponceau 4R, etc.

CAS Number: 2611-82-7Chem/IUPAC Name: Trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4',6,8-trisulphonate and its permitted lakes and salts EINECS/ELINCS No: 220-036-2COSING REF No: 32728

Products with CI 16255

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Sanolin® Ponceau 4RC 82

by Sudarshan Chemical Industries

INCI: CI 16255
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AR18

by Artec Chemical

INCI: CI 16255
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Lake of Ponceau 4R (Koelor-255)

by Koel Colours

INCI: CI 16255
  • Sustainable option
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What is CI 16255 used for?

CI 16255 is used as a colorant in various products in the cosmetic industry. It is basically a dye that imparts red color to products. CI 16255 in cosmetics is used to give a reddish color to products such as lipsticks and blushes. In hair products, it is generally used as a dye for coloring the shafts red.

Origin

CI 16255 is a synthetic red dye that comes in the form of powder. There are many different ways in which this ingredient can be made. However, CI 16255 is most commonly derived from coal tar. It can also be synthesized using aromatic hydrocarbons.

What does CI 16255 do in a formulation?

COSMETIC COLORANT

Safety Profile

CI 16255 is considered safe for use since its molecules are not big enough to penetrate the surface of the skin or scalp. However, it has been linked to respiratory problems, if accidentally inhaled. CI 16255 is also toxic to the environment since it is non-biodegradable and may also be consumed by other living organisms. It is necessary to do a patch test before full application to avoid allergies if any. Apart from this, CI 16255 is vegan and halal.

CI 16255 alternatives

CI 16255 technical profile

PropertyValues
SolubilitySoluble in water