An amino acid, first isolated from the juice of watermelon, Citrullus vulgaris Schrad., Cucurbitaceae. Used in the treatment of asthenia.Synonyms:N5-(Aminocarbonyl)-L-ornithine; Citrulline; N5-Carbamoyl-L-ornithine; NSC 27425; N-Carbamylornithine; a-Amino--ureidovaleric Acid; -UreidonorvalineCAS Number:372-75-8Molecular Formula:C₆H₁₃N₃O₃Molecular Weight:175.19Appearance:Supplied as a white crystalline powder.Purity:≥98%Loss on Drying:≤0.3%Specific Rotation:+24.5 to +26.8°Storage and Stability:Powder may be stored at 4°C. Stable for 6 months after receipt at 4°C.Important Note: This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological. Toxicity and Hazards: All products should be handled by qualified personnel only, trained in laboratory procedures.