Heptachlor epoxide Back Catalog number: 79433 Availability: In the manufacturer's stock Price on request - + Recommended 52251 Method 200.8 Single Element Kit Price on request VHG-NCED-SET1B Nitrogen Set for ASTM D6366: N@Blank, 0.1, 0.5, 1.0, 2.5, 5.0, 10ng/μL in p- Xylene, set(7) Price on request 92314 EPA Method 525 Spike C Price on request