WS Disinfection By-Products - Cal Check 2 Back Catalog number: 93984 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended PFPRA Perfluoropropanoic acid, 50µg/ml in MeOH, 1,2ml Price on request 674556 Fenthion-oxon, 10mg Price on request 94574 EPA Method 525 Standard Price on request