EPA Method 504 Back Catalog number: 81806 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79119 Clopyralid (Lontrel) Price on request 2777.10-100-CY Heptachlor-endo-epoxide (trans-), 100µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-1, Cas.no. 1024-57-3 Price on request 92331 2,4-Dibromophenol Price on request