Optical Brightener OB-1 Appearance: yellowish green powder Purity: ≥99% Volatility: 0.5% max Melting point: 358-360℃

Optical Brightener ER-I/ER-I C.I.: 199 CAS NO.: 13001-40-6 Appearance: light yellow powder/liquid Purity: 99.0% Melting Point: 230-232℃

Optical Brightener CBS-X C.I.: 351 CAS NO.: 27344-41-8 Appearance : yellowish green crystalline powder/granular Max. uv Absorption Wavelength: 348 nm Extinction Coefficient: 1140 Moisture:5%max Indissoluble Substance (in water): 0.5%max E1: 1150+/_38 In Ultra-Violet Range: 348-350nm

Optical Brightener ER-II C.I.: 199:1 CAS NO.: 13001-38-2 Appearance: light yellow powder/liquid Purity: 99.0% Melting Point: 188-192℃