Heptachlor epoxide (isomer B), 1000µg/ml in MeOH, 1ml Back Catalog number: 70193 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 93539 Volatile Standard - 5X Price on request PCB-ISS-H Mass-Labelled PCB Internal/Recovery Standards, 1.2ml, nonane Price on request M312520 6a-Methyl Hydrocortisone 21-Acetate, 50mg Price on request