Heptachlor epoxide (Isomer B), 50mg Back Catalog number: N-12148-50MG Availability: In the manufacturer's stock Price on request - + Recommended VHG-INH41K-100 Ammonium Standard: NH4+, 1000µg/ml in Water, 100ml Price on request 2190.3-50-ME Perfluoropropionic acid, sodium salt, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 378-77-8 Price on request 2219.28-10MG Bisanthene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 190-39-6 Price on request