1-Methyl-4-nitro-5-thioimidazole, 1g Back Catalog number: M324685 Manufacturer: TORONTO RESEARCH CHEMICALS Availability: 2 weeks Price on request - + Recommended 97319 2-Butanone Price on request HPCHLOR-XEP Heptachlor-exo-epoxide (isomer B), 1.2mL x 100ug/mL, nonane Price on request 81203 EPA Method 8121 Internal Standard Price on request