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English name: DL-Glutamine Other names: DL-aminocarbonylbutyric acid; DL-aminoamide; DL-glutamic acid amide CAS number: 6899-04-3C5H10N2O3=146.15 Grade: BR content: ≥99.0% specific optical rotation: 0o loss on drying: ≤0.3% heavy metal: ≤10ppm chloride: ≤0.02% sulfate: ≤0.02% ammonium salt: ≤0.1% arsenic salt: ≤2ppm iron: ≤10ppm trait: white crystalline powder or white prism crystal. At 18 ° C, 1 g was dissolved in 38.5 ml of water and was insoluble in ether. Melting point 185-186 ° C (173-174.5 ° C). Uses: Biochemical research preservation: RT, protected from light