Caffeine Back Catalog number: 79397 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2867.12-50-IO 2,3',4,4',5-Pentachlorobiphenyl ether, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 446254-80-4 Price on request 2594.36-10UG Dinaphtho[8,1,2-abc;8',1',2'-jkl]coronene, neat, Solvent-neat, Unit ca. 10µg , # of units-1, Cas.no. 190-47-6 Price on request 0768.16-500-IO 3,6-Dimethylphenanthrene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 1576-67-6 Price on request