EPA Method 552.1 - Surrogate Standard Back Catalog number: 31056 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 4M163 2,3,3',4',5,6-Hexachloro-4-methoxybiphenyl, 1.2ml x 50ug/ml, nonane Price on request 2298.5-1G Methylsuccinic acid, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 498-21-5 Price on request 70842 2,4,5-T, butoxyethanol ester Price on request