Optical Brightener ER-I whitening agent for polyester fiber-1

Product name:Optical Brightener ER-I
Chemical name: 1.4-Bis-o-cyanostyryl-benzene
Structure:

图片1.png

Formula: C24H16N2
Molecular Weight: 332
C.I.Number: 199
Appearance: Greenish yellow crystalline powder
Melting Point: 230±2 ℃
Purity: 99.0%

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