Heptachlor epoxide (Isomer B), 50mg Back Catalog number: N-12148-50MG Availability: In the manufacturer's stock Price on request - + Recommended 0346.21-K-IO 4-n-Nonylbiphenyl, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 93972-01-1 Price on request 92314 EPA Method 525 Spike C Price on request 59921 ICP-MS Mix Price on request