13C3-Caffeine, 10mg Back Catalog number: 680424 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended L20545000AL Benzo(a)anthracene, 10µg/ml in Acetonitrile, 10ml Price on request 678257 15N3-Atrazine-desethyl, 100 µg/ml, Acetonitrile, Price on request 1367.29-50-IO 17 alpha(H),21 alpha(H)-30-Norhopane, 50µg/mL in Isooctane, 1ml Price on request