L-Serine
Molecular formular: C3H7NO3
Molecular weight: 105.09
L-Serine |
EP6 |
AJI92 |
USP40 |
Description |
A white or almost white, crystalline powder or colourless crystals. |
White crystals or crystalline powder |
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Solubility |
Freely soluble in water,practically insoluble in alcohol. |
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Appearance of solution |
Clarity of solution:5% water solution should be clear |
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Colour of solution:5% water solution should be not more intensively coloured than reference solution BY6 |
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Identification |
Conforms |
Conforms |
Conforms |
Assay |
98.5%-101.0% |
99.0%~101.0% |
98.5%~101.5% |
pH |
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5.2~6.2 |
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Transmittance |
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≥98.0% |
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Loss on drying |
≤0.5% |
≤0.20% |
≤0.2% |
Residue on ignition |
≤0.1% |
≤0.10% |
≤0.1% |
Ninhydrin-positive |
Conforms |
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Chloride |
≤200ppm |
≤0.020% |
≤0.05% |
Heavy Metals |
≤10ppm |
≤10ppm |
≤15ppm |
Iron |
≤10ppm |
≤10ppm |
≤30ppm |
Sulfate |
≤300ppm |
≤0.020% |
≤0.03% |
Arsenic |
/ |
≤1ppm |
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Ammonium |
≤200ppm |
≤0.02% |
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Other amino acids |
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Conforms |
Conforms |
Pyrongen |
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Conforms |
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Specific Rotation |
+14.0 °to +16.0° |
﹢14.4°~﹢15.5° |
﹢14.0°~﹢15.6° |
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