Heptachlor epoxide (Isomer B), 50mg Back Catalog number: N-12148-50MG Availability: In the manufacturer's stock Price on request - + Recommended A12507509AL-100 trans-Permethrinic acid, 100µg/mL in Acetonitrile, 1ml Price on request 673203 Atrazine, 100 µg/ml, Acetonitrile, 5ml Price on request 71209 Methanol, 1000µg/ml in Water, 1ml Price on request