EPA Method 525 Surrogate Standard Back Catalog number: 93971 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675294 Parathion-ethyl, 100 µg/ml, Acetonitrile, 5ml Price on request 11169.6-100MG 4-Methylpyridine,neat,neat,100mg Price on request 675641 Propaquizafop, 10 µg/ml, Ethyl acetate, 10ml Price on request