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 681813 D4-Ethylene thiourea, 10mg Price on request 70020R Aroclor 1254 Price on request 70178 Bis(2-Ethylhexyl) adipate, 1000μg/ml in MeOH, 1ml Price on request