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 BDE-77 3,3',4,4'-Tetrabromodiphenyl ether, 1.2ml x 50ug/ml, nonane Price on request 66003 PCB No. 3, 100µg/ml in Isooctane, 1ml Price on request 59243A Metals Mix Price on request