WS Disinfection By-Products - Cal Check 3 Back Catalog number: 93985 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 684945 Phorate-oxon, 100µg/ml in Acetonitrile, 1ml Price on request 52337 Mixed Calibration Standard 3 Price on request 673675 Prochloraz, 10.0 µg/ml, Ethyl acetate, 10ml Price on request