Good Quanlity Bromcresol Purple CAS No.: 115-40-2 pH Indicator

• CAS No.: 115-40-2
• Formula: C21h16br2o5s
• EINECS: 204-087-8
• Environmental Protection: Yes
• Color: Purplish-Brown
• Classification: Medical Laboratories to Measure Albumin
• Model NO.: IND
• Appearance: Powder
• Molar Mass: 540.22
• Melting Point: 240 °c (DEC.)(Lit.)
• Solubility in Water: < 0.1 %
• Density: 1.8±0.1 g/cm3
• Boiling Point: 590.2±50.0 °c at 760 Mmhg
• Flash Point: 310.7±30.1 °c
• Transport Package: 25 Kgs Fiber Drums
• Specification: 99%
• Trademark: Sinochembt
• Origin: Shenyang
• HS Code: 29349990
• Production Capacity: 500kgs Per Month

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 pK_a 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:
Appearance	Purplish-brown powder	Passes test
pH Visual transition interval	5.2(Yellow)~6.8(violet)	Passes test
Solubility	Passes test	Passes test
Sulfated ash w/%	0.25% max	0.22%
Loss on drying w/%	0.5% max	0.1%