System Performance Standard, in Heptane, 1x5ml Back Catalog number: ASTM-P-0135 Availability: In the manufacturer's stock Price on request - + Recommended 70041 gamma-BHC, 1000μg/ml in MeOH, 1ml Price on request 3321.6-100-CY delta-HCH (BHC) Price on request 11371.8-500-AN Phenylmercury acetate,500µg/mL,acetonitrile,1mL, Price on request