Internal Standard Spiking Solution, 1.2ml, nonane Back Catalog number: EPA-1613ISS Manufacturer: Wellington Laboratories Availability: 1 week Price on request - + Recommended X9111 Heptachlor Price on request 3494.11-100 Propoxur, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 114-26-1 Price on request 680444 gamma-HCH, 100 µg/ml, Methanol, 1ml Price on request