Caffeine (CAS NO.58-08-2), its Synonyms are 1H-Purine-2,6-dione, 3,7-dihydro-1,3,7-trimethyl- ; 3,7-Dihydro-1,3,7-trimethyl-1H-purine-2,6-dione ; 1,3,7-Trimethyl-2,6-dioxopurine ; 1,3,7-Trimethylxanthine ; Alert-pep ; Anhydrous caffeine ; Vivarin ; Wigraine ; Xanthine, 1,3,7-trimethyl . It is white to light yellow crystal powder.
Caffeine (CAS NO.58-08-2) has been isolated from waste tea and from the decaffeinization of coffee by extraction at 70 ℃, using rotating countercurrent drums and an organic solvent, frequently trichloroethylene. The solvent is drained off, and the beans steamed to remove residual solvent. The extraction solvent is evaporated, and the caffeine is hot-water-extracted from the wax, decolorized with carbon, and recrystallized.
Caffeine (CAS NO.58-08-2) is also manufactured synthetically by, for instance, the methylation of theobromine and also total synthesis by methylation and other reactions based upon urea.
Common sources of Caffeine are coffee, tea, and to a lesser extent chocolate derived from cocoa beans. Less commonly used sources of Caffeine include the yerba maté and guarana plants, which are sometimes used in the preparation of teas and energy drinks.
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