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 31079 EPA Method 549.1 Analytes Price on request 673590 Fenoxycarb, 100 µg/ml, Ethyl acetate, 5ml Price on request 79016 a-BHC, 1000µg/ml in Hexane, 1ml Price on request