EPA Method 8021B Internal Standard Back Catalog number: 19394 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1088.20-5MG Benzo[a]pyrene-d12, neat, Solvent-neat, Unit 5mg, # of units-1, Cas.no. 63466-71-7 Price on request 672968 Oxytetracycline hydrochloride, 250mg Price on request 32561 Chloromethane Price on request