Bromophenol red

Structural formula
General
Surname	Bromophenol red
other names	3 ', 3' '- dibromophenolsulfonphthalein
Molecular formula	C 19 H 12 Br 2 O 5 S
Brief description	red-brown solid with a phenolic odor
External identifiers / databases
CAS number 2800-80-8 EC number 220-538-1 ECHA InfoCard 100.018.671 PubChem 76047 Wikidata Q904434
properties
Molar mass	512.19 g mol −1
Physical state	firmly
Melting point	~ 230 ° C (decomposition)
solubility	bad in water
safety instructions
GHS labeling of hazardous substances no GHS pictograms H and P phrases H: no H-phrases P: no P-phrases
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

1. ↑ ^{a b c d e} data sheet bromphenol red (PDF) from Merck , accessed on January 3, 2013.
2. ↑ Data sheet at AppliChem .