EPA Method 8141 Standard Back Catalog number: 92834 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended M373550 Mitragynine, 1mg Price on request 2776.10-100-DC Heptachlor, 100µg/mL, Solvent-dichloromethane, Unit 1mL, # of units-1, Cas.no. 76-44-8 Price on request 81531 MCPB Price on request