# Bromothymol blue

URL: https://app.greenveil.ai/ingredients/ingredient_cas_76_59_5
Categories: beauty, food, industrial, pharma
Functions: colorant, Dye
Identifier: 76-59-5

> Bromothymol blue is used as colorant / dye. Greenveil chemical-concern score: 25/100 — Minor concern based on regulatory listings.. Assessed from 6 sources.

## Safety assessment

- Chemical concern score: 25/100 — Minor concern based on regulatory listings.
- Confidence: 4
- Rationale: Phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis[2-bromo-3-methyl-6-(1-methylethyl)-, S,S-dioxide is listed in Annex IV of the EU Cosmetics Regulation (EC) 1223/2009 (colorants allowed in cosmetic products).

## Regulatory status

- EU: allowed_listed — Annex IV of EU Cosmetics Regulation (EC) 1223/2009: colorants allowed in cosmetic products. Maximum concentration: Rinse-off products
- US: commercial use observed — EPA CPDat observed this chemical in 50 composition records across product categories including Laboratory supplies, Landscape/yard, Specialty occupational products. EPA CPDat classifies this chemical for functional uses including Dye.
- US: listed in openFDA substance — openFDA substance registry classifies this ingredient as chemical.

_Assessed by Greenveil._