Note:  Do not rely on this information. It is very old.


Creatine, a substance of composition C4H9N3O2, which is found in the muscles of all vertebrate animals, and to a smaller extent in the nerves and blood. It may be obtained from flesh or "meat extract" by digestion with water and subsequent purification. It forms monoclinic crystals, which are slightly soluble in cold, and readily in boiling, water. By evaporating the solution with an acid, a substance creatinine is obtained (C4H7N30), which is found in urine.