EPA Method 8141 Standard Back Catalog number: 93595 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679448 Heptachlor endo-epoxide, 100 µg/ml, Methanol, 1m Price on request 59637 Metals Mix #1 Price on request 673520 Cypermethrin, 100 µg/ml, Ethyl acetate, 5ml Price on request