• C.A.S. No.
• 4196–99–0
• C.I. NO.
• 26905
• M.F.
• C₂₂H₁₄N₄Na₂O₇S₂
• M.Wt.
• 556.49 gm/mole

Specifications:

• Dye Content (Spectrophotometry)
• >70%
• Solubility 0.1%(Water)
• Clear Solution
• Absorption maximum.(in water) λmax.
• 506–510 nm
• Absorptivity (A1%, 1cm in water at λmax on dried substance)
• 530–740
• Loss on drying (110^oC)
• <15%
• Suitability for microscopy
• To pass test