# METHYL THIOGLYCOLATE

URL: https://app.greenveil.ai/ingredients/ingredient_source_ref_annex_ref_iii_2b
Categories: beauty, industrial
Functions: Hair waving or straightening
Identifier: DTXSID0033673

> METHYL THIOGLYCOLATE is used as hair waving or straightening. Greenveil chemical-concern score: 70/100 — High concern based on regulatory listings.. Assessed from 6 sources.

## Safety assessment

- Chemical concern score: 70/100 — High concern based on regulatory listings.
- Confidence: 4
- Rationale: Thioglycolic acid esters is restricted in cosmetic products under Annex III of the EU Cosmetics Regulation (EC) 1223/2009.

## Regulatory status

- EU: restricted — Annex III of EU Cosmetics Regulation (EC) 1223/2009: substances which cosmetic products must not contain except subject to the restrictions laid down. Product types: Hair waving or straightening products Maximum concentration: (a) 8% (b) 11% The abovementioned percentages are calculated as thioglycollic acid Other conditions: (a) General use ready for use pH 6 to 9.5 (b) Professional use ready for use pH 6 to 9.5 Conditions of use and warnings: Conditions of use: (a) (b) May cause sensitization in the event of skin contact Avoid contact with eyes In the event of contact with eyes, rinse immediately with plenty of water and seek medical advice Wear suitable gloves Warnings: Contains thioglycolate Follow the instructions Keep out of reach of children (b) For professional use only
- US: commercial use observed — EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Hair waving or straightening.
- US: listed in openFDA substance — openFDA substance registry classifies this ingredient as chemical.

_Assessed by Greenveil._