Optical brightener ER-II/ER-II L (OBA 199:1)   
   
C.I.: 199:1   
CAS No.: 13001-38-2   
Appearance: Slight yellow greenish powder   
Purity: 99%   
Melting point: 188-192℃  190-203 
Usage: A good whitening agent for polyester fiber and as the raw material of    
paste form brightening agent in textile dyeing.   
Package: 25KG fiber drums with PE liner