EPA Method 531.1 Individual Analytes Back Catalog number: 31241 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79521 N-Nitrosodiphenylamine Price on request MBP-79 3,3',4,5'-Tetrachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane Price on request 2128.12-100-IOX10 Arochlor 1254, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-10, Cas.no. 11097-69-1 Price on request