Creatine

Химические свойства

White powder

Вхождение

Creatine is an amino acid that occurs naturally in dairy products, seafood, and beef. It is manufactured by the body in the liver, kidney, and pancreas.

Использование

Creatine is used for gyrate atrophy, McArdle's disease, muscular dystrophy, amyotrophic lateral sclerosis, and rheumatoid arthritis. It is used in congestive heart disease to improve exercise tolerance and to enhance athletic performance.

Методы очистки

Likely impurities are creatinine and other guanidino compounds. It crystallises from the minimum volume of boiling H2O as the monohydrate. The hydrate is also obtained by dissolving in H2O and adding Me2CO. Drying under vacuum over P2O5 or drying at 100o gives the anhydrous base. The anhydrous base can be obtained also by dissolving the hydrate in H2O, seeding with the anhydrous base and cooling in ice. A m of 258 -268o(dec) was reported. The picrate crystallises from 17 parts of H2O with m of 218-220o(dec). [King J Chem Soc 2377 1930, Hoffmann et al. J Am Chem Soc 58 1730 1936, Mendel & Hodgkin Acta Cryst 7 443 1954, Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 p 2750 1961, Beilstein 4 III 1170, 4 IV 2425.]