EPA Method 8140/8141 Analytes Back Catalog number: 81400 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2777.10-100-CY Heptachlor-endo-epoxide (trans-), 100µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-1, Cas.no. 1024-57-3 Price on request 50663 Mix #1 Revised Price on request 50234 Mix #2 Price on request