WS Disinfection By-Products - Cal Check 3 Back Catalog number: 93985 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8990.11-25MG 8-Bromo-1-naphthoic acid, neat, Solvent-neat, Unit 25mg, # of units-1, Cas.no. 1729-99-3 Price on request DF-ST-A Native PCDD/PCDF Solution/Mixture, 1.2ml, nonane Price on request 81204 EPA Method 8121 Surrogate Standard Price on request