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Cosmetic ingredient (INCI)

Solvent Red 23

Used in cosmetic products as hair dyeing. Solvent Red 23 is classed chemically as a disazo colour.

Listed in several EU annexes
  • Prohibited in EU cosmetics, Annex II/1353
  • Allowed colorant, Annex IV/51

Annex IV/51: Not to be used in products applied on mucous membranes

The chemical behind this ingredient

Structure, properties, safety data and price information live on the chemical page.

1-(p-Phenylazophenylazo)-2-naphthol (Sudan III) chemical structure, C22H16N4O, CAS 85-86-9
1-(p-Phenylazophenylazo)-2-naphthol (Sudan III)
CAS 85-86-9C22H16N4O
54 suppliers
1-(p-Phenylazophenylazo)-2-naphthol (Sudan III)

IUPAC name: 1-[(4-phenyldiazenylphenyl)diazenyl]naphthalen-2-ol

  • 2D structure and identifiers
  • Measured and computed properties
  • GHS safety summary
  • Suppliers, prices and trade data

Solvent Red 23 suppliers

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Frequently asked questions

What is Solvent Red 23 used for in cosmetics?

Solvent Red 23 is used in cosmetic products as hair dyeing. Solvent Red 23 is classed chemically as a disazo colour.

Is Solvent Red 23 restricted in cosmetics in the EU?

Solvent Red 23 is listed in the annexes of EU Cosmetics Regulation (EC) No 1223/2009: Annex II/1353 (prohibited in eu cosmetics), Annex IV/51 (allowed colorant). Annex IV/51: Not to be used in products applied on mucous membranes Always check the full annex entry for the conditions of use.

What is the CAS number of Solvent Red 23?

Solvent Red 23 is listed with CAS number 85-86-9 and EC number 201-638-4.

Where can I buy Solvent Red 23?

8 suppliers list 1-(p-Phenylazophenylazo)-2-naphthol (Sudan III) on CompoundList. Compare them below or post a buy request with your grade and quantity.