EPA 8240B Calibration Standard Back Catalog number: 98430 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 74039 Etofenprox, 1000ug/mL in methanol,1ml Price on request 676709 (-)-Cotinine, 25mg Price on request 8912.14-100-T 4-Methyl-2,2',5,5'-tetrachlorodiphenylmethane Price on request