Bromophenol red
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Bromophenol red | |||||||||||||||
other names |
3 ', 3' '- dibromophenolsulfonphthalein |
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Molecular formula | C 19 H 12 Br 2 O 5 S | |||||||||||||||
Brief description |
red-brown solid with a phenolic odor |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 512.19 g mol −1 | |||||||||||||||
Physical state |
firmly |
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Melting point |
~ 230 ° C (decomposition) |
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solubility |
bad in water |
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safety instructions | ||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Bromophenol red is a chemical compound from the group of triphenylmethane dyes and is related to phenol red . It is used as an indicator substance that changes its color from yellow to purple in the pH range from 5.2 to 6.8. At a pH of 4.8, the absorption range is 435–440 nm, at 6.3 it is 574–577 nm.
See also
- Bromophenol red sodium salt C 19 H 11 Br 2 O 5 SNa, CAS number: 102185-50-2
Individual evidence
- ↑ a b c d e data sheet bromphenol red (PDF) from Merck , accessed on January 3, 2013.
- ↑ Data sheet at AppliChem .