Heptachlor Back Catalog number: 79167 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 43026 GC/MS Calibration Standard Price on request 73308 Methyl 11-cis-octadecenoate (C18:1n-7) Price on request 8203.16-10MG 2-Hydroxypyrene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 78751-58-3 Price on request