CAS NO.1533-45-5 Optical Brightener OB-1

CAS NO.1533-45-5 Optical Brightener OB-1 is kind of plastics additives can absorb UV light then emit visible blue light to reduce the yellowish and make the products more white. Optical Brightener OB-1 mainly used in whitening of polyester and plastic, as well in whitening of Nylon during polymerization,also used in ABS, PS, HIPS, PA, PC, PP, PET,EVA, PVC, etc.

Product Name Optical Brightener OB-1
Chemical Name 2.2’-(4.4’-diphenol vinyl) dibenzoxazol
CAS No. 1533-45-5
C.I. No. 393
Structural Formula
Molecular Formula C28H18N2O2
Molecular Weight 414 
Technical Index Appearance:yellowish green powder 
Melting Point:357~359°C 
Purity:≥99% 
Uses Mainly be used in whitening of polyester and plastic, as well in whitening of Nylon during polymerization,also used in ABS, PS, HIPS, PA, PC, PP, PET,EVA, PVC, etc.
Rate of use: (per 1000kg of substrate) 
Polyester: 75-300g 
EVA, PP, nylon: 75-200g
Package 10KG/25kg per fiber drum