1 Product optical brightener OB 2 CAS No. 7128-64-5 3 MF C26H26SO2N2 4 Appearance yellow crystal powder 5 Melting 198-201

Product name	optical brightener OB
CAS No.	7128-64-5
MF	C26H26SO2N2
Chemical name	2.5-bis(-tert-butyl-2-benzoxazolyl)thiophene
Appearance	Bright yellow crystal powder
Melting Point	198-201°C
Purity	99.0%(min)

Use: It is used in thermoplastic plastics. PVC, PE, PP, PS, ABS, SAN, SB, CA, PA, PMMA, acrylic resin. polyester fiber paint, coating the brightening of printing ink.

optical brightener OB