EPA Method 552.1 - Surrogate Standard Back Catalog number: 31056 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677626 Ioxynil-octanoate, 100 µg/ml, Ethyl acetate, 1ml Price on request 10359.21-100-ME Haloperidol-d4 (4-chlorophenyl-d4) Price on request 91161 EPA Method 525 Internals & Surrogates Price on request