Caffeine Back Catalog number: 79397 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 12009.8-100-ME (+/-)-Normetanephrine-?,ß,ß-d3 hydrochloride,100 µg base/mL,MeOH,1mL, Price on request 71267 Triphenylene Price on request 673047 Hexadecyltrimethylammonium bromide, 250mg Price on request