Heptachlor epoxide (isomer B), 1000µg/ml in MeOH, 1ml Back Catalog number: 70193 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 97155 Semi-Volatile Mix #1 Price on request 61221 Aroclor 1221 in Transformer Oil Price on request 681473 N-Butylbenzenesulfonamide, 100 µg/ml, Acetonitril Price on request