C21H16Br2O5S  M.W : 540.22 
 CAS : 115-40-2 
 EC : 204-087-8 
H : H315-319-335 

 Specifications :
- Transition range pH  5.2
- yellow to purple 
- Appearance of solution  conforms
- Sensitivity  Passes test
- Loss on drying (110 °C)  ? 1%
- Absorption maximum ?2max (pH 5.2)  427-431nm
- Absorption maximum ?2max (pH 6.8)  588-590nm
- Absorptivity pH5.2 on dried substance  400-450nm
- Absorptivity pH6.8 on dried substance  1000-1100nm
packaging: glass bottle, volume: 5 g, pcs per sales unit: BRCR-P0D-005