EPA Method 525 Surrogate Standard Back Catalog number: 93971 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676686 Ethofumesate-2-keto, 10.0 µg/ml, Cyclohexane, 1m Price on request 680500 Mepanipyrim, 10 µg/ml, Cyclohexane, 10ml Price on request 678001 Methamidophos, 100 µg/ml, Toluene, 1ml Price on request