BROMOTHYMOL BLUE
Phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis[2-bromo-3-methyl-6-(1-methylethyl)-, S,S-dioxide
BROMOTHYMOL BLUE is linked to 1 EU annex record on this page. Inventory note: IV/151.
Regulatory evidence by market
This matrix separates verified ingredient rules from sources that are mapped but not yet imported. No imported rule does not mean the ingredient is permitted.
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| Market | Evidence status | Records | Source language |
|---|---|---|---|
| European Union | Evidence linked Positive-list entry with conditions Open this evidence | 1 | English and EU languages |
| Great Britain | Evidence linked Permitted list with conditions Open this evidence | 1 | English |
| Canada | Source mapped Official source mapped; ingredient rule not imported | 0 | English and French |
| New Zealand | Evidence linked Permitted list with conditions Open this evidence | 1 | English |
| ASEAN | Source mapped Official source mapped; ingredient rule not imported | 0 | English and national languages |
| China | Source mapped Official source mapped; ingredient rule not imported | 0 | Chinese with selected English material |
| Japan | Source mapped Official source mapped; ingredient rule not imported | 0 | Japanese; official English translation available |
| South Korea | Source mapped Official source mapped; ingredient rule not imported | 0 | Korean with some English names |
| United States | Source mapped Official source mapped; ingredient rule not imported | 0 | English |
| Australia | Source mapped Official source mapped; ingredient rule not imported | 0 | English |
| Brazil | Source mapped Official source mapped; ingredient rule not imported | 0 | Portuguese with INCI crosswalks |
| India | Source mapped Official source mapped; ingredient rule not imported | 0 | English and Hindi |
| Saudi Arabia | Source mapped Official source mapped; ingredient rule not imported | 0 | Arabic and English |
Chemical identity and properties
Bromothymol Blue
Bromothymol blue is a member of the class of 2,1-benzoxathioles that is 2,1-benzoxathiole 1,1-dioxide in which both of the hydrogens at position 3 have been substituted by 3-bromo-4-hydroxy-5-isopropyl-2-methylphenyl groups. It has a role as a dye, an acid-base indicator and a two-colour indicator. It is a polyphenol, an organobromine compound, a 2,1-benzoxathiole, a sultone and an arenesulfonate ester. — ChEBI
- IUPAC name
- 2-bromo-4-[3-(3-bromo-4-hydroxy-2-methyl-5-propan-2-ylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-3-methyl-6-propan-2-ylphenol
- Molecular formula
- C27H28Br2O5S
- Molecular weight
- 624.4 g/mol
- Exact mass
- 624.00037 Da
- XLogP3
- 7.6
- Topological polar surface area
- 92.2 Ų
- Hydrogen-bond donors
- 2
- Hydrogen-bond acceptors
- 5
- Covalent units
- 1
- Defined stereocentres
- 0
Also known as
16 more reported names
External database identifiers
- ChEBI:CHEBI:86155
- ChEMBL:CHEMBL3392578
- EPA DTXSID:DTXSID3058799
- PubMed:20869355
Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.
Inventory details for BROMOTHYMOL BLUE
INCI name
BROMOTHYMOL BLUE
Description
Phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis[2-bromo-3-methyl-6-(1-methylethyl)-, S,S-dioxide
Record provenance
- Inventory reference
- 32229
- Imported identity
- BROMOTHYMOL BLUE
- Source update
- 12/08/2020
Annex records for BROMOTHYMOL BLUE
Key data
- COLORANT
- Exclusively or mainly intended to colour the cosmetic product, the body as a whole or certain parts thereof, by absorption or reflection of visible light. All authorised colorants are substances in the positive list of Annex IV to the Cosmetics Regulation 1223/2009.
Official EU ingredient-name evidence
The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.
Related inventory evidence
Ingredients with overlapping formulation functions
Additional official and scientific sources
11 external databases to check this identity in
Each link searches that source for this identity. What each source is, and its legal weight
How BROMOTHYMOL BLUE appears in the CosIng inventory
The CosIng inventory lists BROMOTHYMOL BLUE as a cosmetic ingredient and this page links it to 1 annex record. The inventory entry captures names and identifiers, while the annex record shows where the substance is prohibited, restricted or positively listed in EU cosmetics law.
BROMOTHYMOL BLUE is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.
Frequently asked questions
Source note for BROMOTHYMOL BLUE
This page combines the CosIng inventory entry for BROMOTHYMOL BLUE with 1 linked Annex II–VI record from the local dataset built from public European Commission cosmetic ingredient materials.
Use this inventory page to research BROMOTHYMOL BLUE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.
Tools & next steps
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