EPA Method 531.1 Individual Analytes Back Catalog number: 30041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677964 Heptenophos, 100 µg/ml, Toluene, 1ml Price on request 2791.13-100-IO 4,4'-Methylenebis(2-chloroaniline), 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 101-14-4 Price on request 1363.11-250MG 4-n-Pentylphenol, neat, Solvent-neat, Unit 250mg, # of units-1, Cas.no. 14938-35-3 Price on request