- C.A.S. No.
- 115-40-2
- M.F.
- C21H16Br2O5S
- M.Wt.
- 540.24gm/mole
Specifications:
- Dye content
- >95%
- Transition range
- pH 5.2–6.8
Yellow – Purple
- Solubility 0.1%(95%Ethanol)
- Clear solution
- Absorption maximum (pH 5.2) λ1max
- 427–431nm
- Absorption maximum (pH 6.8) λ2max
- 588–590nm
- Absorptivity (A1%/1cm at pH 5.2 at λ1max)
- 400–500
- Absorptivity (A1%/1cm at pH 6.8 at λ2max)
- 1000–1100
- Loss on drying (110oC)
- <1%