EPA Method 508 Pesticide Standard Back Catalog number: 92961 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 95489 EPA Method 524.3 - Surrogate Standard Price on request 71421 Ethylene oxide, 1000µg/ml in Water, 1ml Price on request 57081 Thallium (Tl) Price on request