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 58029 Copper (Cu) Price on request 673351 Methamidophos, 100 µg/ml, Acetonitrile, 5ml Price on request L18000014CY Pesticide Mix 14, 10µg/mL in Cyclohexane, 10ml Price on request