Bromophenol blue, also known as tetrabromophenol blue, is a 2,1-benzoxathiole 1,1-dioxide carrying two 3,5-dibromo-4-hydroxyphenyl groups at position 3. It is used as a laboratory indicator, yellow at pH 3.0 and purple at pH 4.6, and as a dye and biological stain. It dissolves in water at about 0.4 g per 100 mL and is more soluble in methyl and ethyl alcohol.
Full specification
- Molecular formula
- C19H10Br4O5S
- Appearance
- Odourless solid; colour varies from tan to purple or red
- Synonyms
- tetrabromophenol blue
Compliance & regulatory
Region: EU — Chemotto S.r.l., Milano
- REACH-aligned supply
- CLP-labelled
REACH REACHRegistration, Evaluation, Authorisation and Restriction of Chemicals — the EU chemicals regulation (EC 1907/2006). CLP CLPClassification, Labelling and Packaging — the EU regulation (EC 1272/2008) for hazard communication. SVHC SVHCSubstance of Very High Concern — flagged on the REACH Candidate List for possible authorisation or restriction.
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