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L-焦谷氨酸

2014-09-30 01:12:51

英文名稱: L-Pyroglutamic acid
其它名稱: H-Pyr-OH; L-5-Oxo-2-pyrrolidinecarboxylic acid; (S)-2-Pyrrolidone-5-carboxylic acid
分子式: C5H7NO3
分子量: 129


理化性質:
白色結晶或結晶性粉末;溶于水、醇、丙酮和冰醋酸,微溶于乙酸乙酯,不溶于醚。

L-焦谷氨酸主要用途:
1. 在化妝品中作為抗氧化劑,與酚類衍生物協同作用,可防止皮膚老化。
如保濕作用;增白作用;軟化作用;透明作用;
2. 作為食品添加劑和醫藥中間體
3. 體格增補劑,如抗疲勞作用

L-焦谷氨酸指標
Description: White crystalline powder
Assay: 99.0% to 101.0%
Specific rotation (a) 20/D (C=2, H2O): -11 to -12 Degree
Transmittance: Not less than 98.0%
Melting point: 158.0 ℃ to 161.0 ℃
Chloride (Cl): NMT 0.02%
Ammonium (NH4): NMT 0.02%
Sulfate (SO4): NMT 0.02%
Heavy metals (as Pb): NMT 10 ppm
Iron (Fe): NMT 10 ppm
Arsenic (As2O3): NMT 1 ppm
Loss on drying: NMT 0.50%
Residue on ignition: NMT 0.1%

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