Chemical name: 1, 4-Bis(2-cyano styryl)benzene
Match: Optical Brightener ER, Fluorescent Whitening Agent ER, Fluorescent Brightener ER, Optical Brightening Agent ER, Fluorescent Whitening Agent 199
Molecular formula: C24H16N2
Molecular weight: 332
CAS No.: 13001-40-6
C. I: 199
Appearance: Yellowish-green crystalline powder.
Melting point: 230-234° C
Assay: 99.0% min
Volatile Content: 0.3% max
Ash: 0.3% max
Maximum UV Absorption Spectrum: 365nm
It is widely used in whitening of polyester fiber and as the raw material of paste form brightening agent in textile dyeing.
Package: Packing in 25kg fiber drum or according to the requirement of the customers.