BROMOCRESOL PURPLE FREE ACID Grade:REAGENT GRADE CAS Number: 115-40-2Synonym(s): 5,5'-Dibromo-o-Cresolsulfonephthalein Molecular Weight: 540.24Molecular Formula: C21H16Br2O5S Storage Condition: ROOM TEMPERATURE CodeSizePriceQuantity 0531-25G 0531-100G A viability pH indicator (Yellow to Purple; range 5.2-6.8). Also used for live/dead differentiation of yeast. Color Index: N/A