WS Disinfection By-Products - Cal Check Back Catalog number: 91837 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673718 Trifloxystrobin, 100 µg/ml, Ethyl acetate, 5ml Price on request 93600 EPA Method 502.2/624Mix Price on request 79663 Pyrene Price on request