2-chloro-4-{(E)-[3-(methylthio)-1,2,4-thiadiazol-5-yl]diazenyl}phenol

Maximum permitted concentration

(b) 0,5 %

Regulatory framework

Regulation (EC) No 1223/2009 — Annex III, ref. 386

Last update reflected in the database: 6 May 2026

Conditions of use

For (a): After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 1,5 %.

Labelling warnings

For (a): To be printed on the label: The mixing ratio. “Hair colourants can cause severe allergic reactions. Read and follow instructions. This product is not intended for use on persons under the age of 16. Temporary ‘black henna’ tattoos may increase your risk of allergy. Do not colour your hair if: — you have a rash on your face or sensitive, irritated and damaged scalp, — you have ever experienced any reaction after colouring your hair, — you have experienced a reaction to a temporary ‘black henna’ tattoo in the past”.