~Product Name Optical Brightening Agent 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.
For whitening of polyester and nylon; 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 25kg per fiber drum