EPA Method 531.1 - Analytes Mixture Back Catalog number: 33042R Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 681444 4-Acetamidoantipyrine, 10.0 µg/ml, Acetonitrile, Price on request 94748 4,4’-Methylene bis(2-chloroaniline) Price on request 0492.8-K-IO Di(2-thienyl)disulfide, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 6911-51-9 Price on request