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| · Add.: |
Houfu Industrial Zone, Taoyuan Town, Jinzhou City, Hebei Prov., China. |
| ·Contact: |
Liu Jimao(Factory director) |
| · Email: |
kitty-qiao@163.com |
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L(-)-Proline |
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Molecular formula: C5H9NO2;
Molecular weight: 115.13
Cas No: [147-85-3]
Appearance: white crystal or white powder
Packing & storage: In 25kg drum lined with two-layer plastic bag; stored in tightly clsoed containers with room temperature.
Useful life: 2 years.
Quality standard: Japan
Ajinomoto
92/USP 24 /CP 2000
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Test item |
Spec. (AJI92) |
Spec. (USP24) |
Spec.(CP2000) |
| Appearance |
white crystal or white powder |
| Identification |
Measured by infrared absorption spectrometer |
| Specific rotation |
-84.5º- -86.0º |
-84.3º- -86.3º |
-84.5º- -86.0º |
| Solubility |
≥ 98.0% |
--- |
≥ 98.0% |
| Chlorine content |
≤ 0.020% |
≤ 0.05% |
≤ 0.02% |
| Ammonia salt (NH4 ) |
≤ 0.02% |
--- |
≤ 0.02% |
| Sulphate (SO4 ) |
≤ 0.020% |
≤ 0.03% |
≤ 0.02% |
| Iron salt (Fe) |
≤ 10PPm |
≤ 0.003% |
≤ 0.001% |
| Heavy metal (Pb) |
≤ 10PPm |
≤ 0.0015% |
≤ 0.001% |
| Arsenic salt (As2O3 ) |
≤ 1PPm |
--- |
≤ 0.0001% |
| Other amino acids |
Meet the standard |
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≤ 0.5% |
| Drying loss |
≤ 0.30% |
≤ 0.4% |
≤ 0.3% |
| Residue on ignition |
≤ 0.1% |
≤ 0.4% |
≤ 0.1% |
| Assay |
99.0 - 101.0% |
98.5 - 101.5% |
≥ 98.5% |
| Acidity |
5.9-6.9 |
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5.9-6.9 |
| Organic volatiles and impurities |
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Meet the standard |
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