EPA Method 552.1 - Surrogate Standard Back Catalog number: 31057 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 674815 Prothoate, 10 µg/ml, Ethyl acetate, 10ml Price on request C17894320 Tris(2-chloro-1-(chloromethyl)ethyl) phosphate, certified, 0,25g Price on request 674799 PSA-GCB-Mix 16 Price on request