WS Disinfection By-Products - Cal Check Back Catalog number: 91837 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2147.8-50-ME 6:2 FTOH, 50µg/ml in MeOH, 1ml Price on request 11179.17-500-IO Amber dioxane isomer mixture,500µg/mL,isooctane,1mL Price on request 79670 Phenanthridine Price on request