13C3-Caffeine, 100 µg/ml, Methanol, 1ml Back Catalog number: 681491 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 71060 Picloram methyl derivative Price on request 50769 EPA Method 200.8 Price on request BB-80 3,3',5,5'-Tetrabromobiphenyl, 1.2ml x 50ug/ml, nonane Price on request