• C.A.S. No.
• 76-60-8
• M.F.
• C₂₁H₁₄Br₄O₅S
• M.Wt.
• 698.04gm/mole

Specifications:

• Dye content
• >95%
• Transition range
• pH 3.8–5.4
  Greenish yellow-Blue
• Solubility 0.1%(95%Ethanol)
• Clear solution
• Absorption maximum (pH 3.8) λ₁max
• 438–443nm
• Absorption maximum (pH 5.4) λ₂max
• 615–618nm
• Absorptivity (A1%/1cm at pH 3.8 at λ₁max)
• 240-270
• Absorptivity (A1%/1cm at pH 5.4 at λ₂max)
• 530-570
• Loss on drying (110^oC)
• <3%