Thioglycolic acid in EU cosmetics: Annex III, entry 2a
Thioglycolic acid: the maximum concentrations and conditions are in the entry below. Annex III, entry 2a, consolidated 18 May 2026.
- Annex
- III: List of substances which cosmetic products must not contain except subject to the restrictions laid down
- Reference number
- 2a
- Chemical name/INN
- Thioglycolic acid and its salts
- Name of Common Ingredients Glossary
- Thioglycolic acid
- CAS number
- 68-11-1
- EC number
- 200-677-4
- Version
- Consolidated version of 18 May 2026
- Official source
- Regulation (EC) No 1223/2009, consolidated text
Official wording: restrictions
- Product type, body parts: (a) Hair waving or straightening products | Maximum concentration in ready for use preparation: (a) (i) 8 % (ii) 11 % | Other: (a) (i) General use ready for use pH 7 to 9,5 (ii) Professional use ready for use pH 7 to 9,5
- Product type, body parts: (b) Depilatories | Maximum concentration in ready for use preparation: (b) 5 % | Other: (b) ready for use pH 7 to 12,7
- Product type, body parts: (c) Other hair rinse-off products | Maximum concentration in ready for use preparation: (c) 2 % | Other: (c) ready for use pH 7 to 9,5
- Product type, body parts: (d) Products intended for eyelash waving | Maximum concentration in ready for use preparation: (d) 11 % The abovementioned percentages are calculated as thioglycolic acid | Other: (d) For professional use ready for use pH 7 to 9,5
Official wording: conditions of use and warnings
Conditions of use:
(a) (b) (c) (d)
Avoid contact with eyes
Rinse eyes immediately if product comes into contact with them.
(a) (c) (d)
Wear suitable gloves
Warnings to be printed on the label:
(a)(i) (b) (c)
Contains thioglycolate
Follow the instructions
Keep out of reach of children
(a)(ii) (d)
For professional use only
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