Heptachlor epoxide Back Catalog number: 72764 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 681123 Dihydroergotamine mesylate, 50mg Price on request 92771 Chlorophenols Standard Price on request 0262.20-200-T Benzo[a]fluoranthene, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 203-33-8 Price on request