产品编号: AS785CAS: 56-84-8现货
门冬氨酸 L-Aspartic acid
门冬氨酸 L-Aspartic acid。专业精细化工原料，一站式在线采购。提供高标准质量控制，支持精准搜索与 COA 在线下载。
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剩余库存 100 件
已选规格配置1kg/Bag × 1
合计¥620.00
推荐应用场景
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质量检测标准
性状 Character
应为白色或类白色结晶或结晶性粉末；无臭。本品在水中微溶；在乙醇中不溶，在稀盐酸或氢氧化钠溶液中溶解。
It should be white or off-white crystalline powder; odorless. It is slightly soluble in water; insoluble in ethanol, soluble in dilute hydrochloric acid or sodium hydroxide solution.
比旋度 Specific optical rotation
应为+24.0° ～ +26.0°
It should be +24.0° ~ +26.0°
鉴别 (1) 薄层色谱 Identification (1) Thin-layer chromatography
供试品溶液所显主斑点的位置和颜色应与对照品溶液的主斑点相同
The position and color of the main spot from the test solution should be the same as that of the reference solution.
鉴别 (2) 红外光谱 Identification (2) Infrared spectroscopy
红外光吸收图谱应与对照的图谱（光谱集 913 图）一致
The infrared absorption spectrum should be consistent with the reference spectrum (Spectra Collection Figure 913).
酸度 pH
应为 2.0～4.0
It should be 2.0～4.0
溶液的透光率 Transmittance of solution
在 430nm 的波长处应不得低于 98.0%
At the wavelength of 430nm, it should not be less than 98.0%.
氯化物 Chloride
应不得过 0.02%
It should not exceed 0.02%.
硫酸盐 Sulfate
应不得过 0.02%
It should not exceed 0.02%.
铵盐 Ammonium
应不得过 0.02%
It should not exceed 0.02%.
其他氨基酸 Other amino acids
应不得过 0.5%
It should not exceed 0.5%.
干燥失重 Loss on drying
应不得过 0.2%
It should not exceed 0.2%.
炽灼残渣 Residue on ignition
应不得过 0.1%
It should not exceed 0.1%.
铁盐 Iron
应不得过 0.001%
It should not exceed 0.001%.
重金属 Heavy metals
应不得过百万分之十
It should not exceed 10 ppm.
砷盐 Arsenic
应不得过 0.0001%
It should not exceed 0.0001%.
热原（委检） Pyrogen (entrusted test)
应符合规定
It should comply with the requirements.
含量测定 Assay
按干燥品计算，含门冬氨酸 (C4H7NO4) 应为 98.5% ～ 101.5%
Calculated on the dried basis, it contains L-Aspartic acid (C4H7NO4) not less than 98.5% and not more than 101.5%.