EPA Method 8140/8141 Analytes Back Catalog number: 81400 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9350.4-K-ME Piperazine Price on request 1300.6-K-ME Benzene, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 71-43-2 Price on request 3916.8-1ML N-Methyl-N-(trimethylsilyl)heptafluorobutyramide, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 53296-64-35 Price on request