Bromocresol purple, powder

Supplier: MP Biomedicals
Warning

Synonyms: 5',5''-Dibromo-o-cresolsulphonphthalein, 3,3-Bis(3-bromo-4-hydroxy-5-methylphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide

0219508005 0219508025 0219508080
ICNA0219508005EA 63.6 SGD
ICNA0219508005 ICNA0219508025 ICNA0219508080
Bromocresol purple, powder
Bromocresol purple

Bromocresol Purple is used as a pH indicator (5.2-6.8 : yellow to blue-purple). Used in spectrophotometric determination of serum-albumin.


Bromocresol purple binds quantitatively with human serum albumin forming a stable complex with absorbance maximum at 600 nm. The intensity of the color produced is directly proportional to the albumin concentration in the sample.


Soluble in water (20 mg/ml), ethanol (80 mg/ml) or methyl cellosolve (300 mg/ml). Soluble in methanol (4 mg/ml).

Formula: C₂₁H₁₆Br₂O₅S
MW: 540,23 g/mol
Melting Pt: 240 °C (dec., lit.)
Storage Temperature: Ambient
MDL Number: MFCD00011681
CAS Number: 115-40-2

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Specification Test Results

Identity Test Passes
UV/Vis: l max (MeOH) 418 ± 3 nm
pH Color Interval Passes

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