WS Residual Free Chlorine Back Catalog number: 55023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72354 Imazaquin Price on request 59405 Cations Solution C Price on request 2872.19-50-IO 9-Fluoro-5-methylchrysene, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 64977-46-8 Price on request