Heptachlor epoxide Back Catalog number: 96891 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 95282 Potassium butylxanthate (as butylxanthate acid) Price on request 19267 EPA Method 502/524 Surrogate Standard #2 Price on request 95786 EPH Aliphatic n-Hydrocarbons Price on request