Specification
Product Name BROMO CRESOL PURPLE
Synonyms 5',5"-Dibromo-o-cresolsulfonephthalein
CAS NO. 115-40-2
Molecular Formula C21H16Br2O5S
Molecular Weight 540.24
Appearance Grey to light purple or pink to yellow-tan powder
Structure
   
Tests    Limits
1. Transition Range pH 5.2 – pH 6.8
Greenish Yellow – Purple
2. Solubility 0.1% (EtOH) Clear golden yellow Solution
3. Absorptivity 1%/1cm,
(pH 5.2) at λ max.431.0nm
(pH 6.8) at λ max.589.0nm


400-450

1000-1100

4. Loss on Drying at 1100C (1hr) < 1%
   
   
REVISED: 1-1-2012  
 
 
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