EPA Method 8141 Standard Back Catalog number: 93595 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675720 Heptachlor-exo-epoxide, 100 µg/ml, Ethyl acetate, Price on request X9198 Thionazin Price on request 55202 Sodium Chloride for 55201 and 55203 Price on request