EPA Method 502/524 Surrogate Standard #2 Back Catalog number: 19267 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79601 Biphenyl Price on request 9852.9 (+/-)-Cathinone hydrochloride-d3, , Solvent-, Unit , # of units-, Cas.no. Price on request 71056 2-Ethyltoluene Price on request