Bromochlorophenol blue

Structural formula
General
Surname	Bromochlorophenol blue
other names	5 ', 5' '- dibromo-3', 3 '' - dichlorophenolsulfonphthalein
Molecular formula	C 19 H 10 Br 2 Cl 2 O 5 S
Brief description	red powder
External identifiers / databases
CAS number 2553-71-1 102185-52-4 (sodium salt) EC number 219-861-0 ECHA InfoCard 100.018.056 PubChem 73120 Wikidata Q926471
properties
Molar mass	581.98 g mol −1
Physical state	firmly
Melting point	230 ° C (decomposition)
solubility	slightly soluble in water soluble in ethanol
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 .

Bromochlorophenol blue is a chemical compound from the group of triphenylmethane dyes and is related to phenolphthalein . It is used as an indicator substance that changes its color from yellow to blue-violet in the pH range from 3.0 to 4.6. At a pH value of 3.0 the absorption range is 433–437 nm, at 4.5 it is 590–592 nm.

See also

• Bromophenol blue

Individual evidence

1. ↑ ^{a b c d} Datasheet Bromochlorophenol Blue from Sigma-Aldrich , accessed on December 9, 2015 ( PDF ).
2. ↑ ^{a b} Entry on bromochlorophenol blue. In: Römpp Online . Georg Thieme Verlag, accessed on December 9, 2015.
3. ↑ Data sheet bromochlorophenol blue from Applicher, accessed on December 5, 2016.