EPA Method 507/525 Analytes Mix #4 Back Catalog number: 30085 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3434.12-100-AN MCPB-methyl ester Price on request 677680 Benzo[a]pyrene, 100 µg/ml, Acetonitrile, 1ml Price on request 79309 Permethrin (mixed isomers) Price on request