EPA Method 504.1 - 524.2 Analytes Back Catalog number: 96656 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678531 Chlorpyrifos-methyl, 10 µg/ml, Acetone, 10ml Price on request 683317 1,3-Diphenylguanidine, 1000mg Price on request 680061 Methyl 2-octynoate, 1ml Price on request