EPA Method 551 - Disinfection By-Products Back Catalog number: 32852 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended D479975 2,4-Dinitrophenylhydrazine, 98%, 25g Price on request 2161.12-50-T 6-Fluoro-2,2',4,4'-tetrabromodiphenyl ether, 50µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 876310-23-4 Price on request 31161 1,2-Dibromoethane Price on request