- C20H17N3Na2O9S3 - M = 585,54 g/mol - CAS [3244-88-0] - EINECS-No.: 221-816-5 - Solub. in water: (20 ºC): 200 g/l - Melting point: > 130 ºC (decomposes) - Tariff number: 3204 12 00 00 - Applications: indicator, manufacturing of inks (for biology), microscopy. SPECIFICATIONS Absorption maximum l(in HCl 0,005 mol/l): 540 - 545 nm Absorptivity (A1%/1 cm; l max.): 800 - 1300 loss on drying (135 °C) : max. 10 %