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Good Quanlity Bromcresol Purple CAS No.: 115-40-2 pH Indicator1
BiochemicalIndicator Grade Bromcresol PurpleBromocresol Purple (BCP)
Shenyang Sinochem Biotech Co., Ltd.
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Product Description Bromocresol purple (BCP) or 5′,5″-dibromo-o-cresolsulfophthalein, is a dye of the triphenylmethane family (triarylmethane dyes) and a pH indicator. It is colored yellow below pH 5.2, and violet above pH 6.8. In its cyclic sulfonate ester form, it has a pKa value of 6.3, and is usually prepared as a 0.04% aqueous solution.Bromocresol purple is used in medical laboratories to measure albumin. Use of BCP in this application may provide some advantage over older methods using bromocresol green. In microbiology, it is used for staining dead cells based on their acidity, and for the isolation and assaying of lactic acid bacteria.Specification:Requirements:Results:AppearancePurplish-brown powderPasses testpH Visual transition interval5.2(Yellow)~6.8(violet)Passes testSolubility Passes testPasses testSulfated ash w/%0.25% max0.22%Loss on drying w/%0.5% max 0.1%
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