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 13700-0165-100WS5 Trichloroacetic acid (TCA), 100μg/ml in Water, 5ml Price on request N650432 4-Nonyl Phenol-13C6, 1mg Price on request 30212 Dichlorobenzene Standard Price on request