EPA Method 8141 Standard Rev 1 Back Catalog number: 98131 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 682489 3-Heptanone, 1000mg Price on request 673994 Nitrofen, 100mg Price on request 1356.6-100-DC Hexachlorobenzene, 100µg/mL, Solvent-dichloromethane, Unit 1mL, # of units-1, Cas.no. 118-74-1 Price on request