EPA Method 515.1 Internal Standard Back Catalog number: 30023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended MCDE-180 2,2',3,4,4',5,5'-Heptachloro[13C12]diphenyl ether, 1.2ml x 50ug/ml, nonane Price on request 71309 N-Methyldiethanolamine Price on request 11978.21-10MG Propafenone hydrochloride,neat,neat,10mg, Price on request