ISATIN is graded C (Moderate) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexIII-SAFETY-.
ISATIN
Safety grade: C
Isatin is a chemical compound that comes from natural sources like plants and indigo. It's used in hair dyes to create color by bonding with hair proteins and producing lasting pigment.
Isatin is used in hair dyeing products as a color-forming agent that helps create and stabilize hair color through chemical reactions with the hair structure.
Graded using: COSING.
- EU COSING — Restricted
Last verified: May 26, 2026
Safer alternatives to ISATIN
- ACID VIOLET 43 — Grade A. Direct hair dye colorant that creates color through chemical bonding with hair
- BASIC BROWN 17 — Grade A. Basic dye that deposits color directly onto hair fiber structure
- BASIC BLUE 99 — Grade A. Basic dye that provides direct coloration by binding to hair keratin
- LAWSONIA INERMIS EXTRACT — Grade A. Plant-based dye source (henna) that colors hair through natural colorant compounds
Other Hair Dyeing ingredients
- RESORCINOL — Grade E**
- THYMOL — Grade A
- M-AMINOPHENOL — Grade C**
- P-AMINOPHENOL — Grade C**
- 2-METHYLRESORCINOL — Grade C
- 4-AMINO-2-HYDROXYTOLUENE — Grade C
- P-PHENYLENEDIAMINE — Grade D**
- 2-METHYL-5-HYDROXYETHYLAMINOPHENOL — Grade C