WS Disinfection By-Products - Cal Check Back Catalog number: 91837 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 91870 Aroclor 1254 Price on request 59844 ICP-MS Calibration Standard Price on request 9284.17-K-ME Sertraline hydrochloride, 1000µg base/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 79559-97-0 Price on request