CAS Registry Number

CAS 115-40-2 — Bromocresol Purple

Bromocresol Purple is a pH indicator dye used in analytical chemistry and biological assays to detect acid-base transitions. It appears purple in basic solutions and yellow in acidic conditions. Available in powder form with a molecular weight of 540.22 g/mol, CAS number 115-40-2, and molecular formula C21H16Br2O5S. Store at ambient temperature. Signal word: Warning. Molekula supplies Bromocresol Purple from research to bulk quantities with full documentation and ISO 9001:2015 traceability.

Also known as: 3,3-Bis(3-bromo-4-hydroxy-5-methylphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide · 4,4'-(3H-2,1-BENZOXATHIOL-3-YLIDENE)BIS(2-BROMO-6-METHYLPHENOL) S,S-DIOXIDE · 5,5'-Dibromo-o-cresolsulfonphthalein · BROMCRESOL PURPLE · C21H16Br2O5S · Indicator bromocresol purple · Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-bromo-6-methyl- · Phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis(2-bromo-6-methyl)-, S,S-dioxide · Purple, Bromcresol · Purple, Bromocresol · Bromocresol Purple (Ro)