EPA Method 551.1 Surrogate Standard Back Catalog number: 31102 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72148 Diltiazem Price on request 678084 Chlorpyrifos-methyl, 100 µg/ml, Acetonitrile, 1m Price on request 681359 2,4-Dimethylaniline, 500mg Price on request