D5-Atrazine, 100 µg/ml, Acetone, 1ml Back Catalog number: 675980 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 674678 D4-Acetylsalicylic acid, 50mg Price on request 8631.31-10UG 3ß,17ß(H),21ß(H)-3-Methylhopane, neat, Solvent-neat, Unit ca. 10µg , # of units-1, Cas.no. 497938-80-4 Price on request 674233 Fenthion-oxon-sulfone, 10.0 µg/ml, Acetonitrile, Price on request