Fluorescent Brightener Agent OB-2 [4,4''-Bis(5-methyl-2-benzoxazolyl)stilbene], 97%, 5g Back Catalog number: Q147 Availability: In the manufacturer's stock Price on request - + Recommended 40060 EPA Method 8081A Pesticide Standard Price on request 50737 Nitrate as NO3- Price on request 52062 SIC 3 Price on request