Bromophenol blue
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Description
A tan to orange powder that is used as an acid-base indicator dye. In solution, bromophenol blue gives a yellow color below pH 3.0 and purple color above pH 4.6.
Synonyms and Related Terms
Bromphenolblau (Deut.); bromphenol blue; bromcresol blue; bromphenol blue sulfone form; 3,3',5,5',-tetrabromophenolsulfonphthalein; 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis(2,6-dibromophenol)S,S dioxide
Risks
- Ingestion, inhalation or contact may cause irritation.
- ThermoFisher: SDS
Physical and Chemical Properties
Soluble in ethanol, ether, ethyl acetate, benzene, alkali solutions. Slightly soluble in water. Hexagonal crystals.
| Composition | C19H10Br4O5S |
|---|---|
| CAS | 115-39-9 |
| Melting Point | 273 C |
| Molecular Weight | mol. wt. = 670.02 |
| Boiling Point | 279 (dec) C |
Resources and Citations
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1468
- Sigma Dyes, Stains and Natural Pigments, Infrared Library, Nicolet, 1991-1995 Comment: OMNIC: formula= C19H10Br4O5S, CAS= 115-39-9