Heptachlor epoxide (isomer B), 1000µg/ml in MeOH, 1ml Back Catalog number: 70193 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 673099 Propyphenazone, 250mg Price on request 94577 EPA Method 524.2 Volatile Standard Price on request 10443.25-10MG Irganox 1520 Price on request