EPA Method 525 Spike B Back Catalog number: 92313 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679981 Diflufenzopyr, 100mg Price on request 673493 Bupirimate, 100 µg/ml, Ethyl acetate, 5ml Price on request 79153 Octachlorostyrene Price on request