Customization: | Available |
---|---|
CAS No.: | 73-22-3 |
Formula: | C11h12n2o2 |
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pecification:
L-Tryptophan |
CP2015 |
AJI92 |
USP32 |
USP40 |
Description |
White to slightly yellow crystals or crystalline powder |
White to yellowish white crystals or crystalline powder |
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Identification |
Conforms |
Conform |
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Conform |
Assay |
≥99.0% |
98.5%~100.5% |
98.5%~101.5% |
98.5%~101.5% |
pH |
5.4~6.4 |
5.4~6.4 |
5.5~7.0 |
5.5~7.0 |
Transmittance |
≥95.0% |
≥95.0% |
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Loss on drying |
≤0.2% |
≤0.20% |
≤0.3% |
≤0.3% |
Residue on ignition |
≤0.1% |
≤0.10% |
≤0.1% |
≤0.1% |
Chloride |
≤0.02% |
≤0.020% |
≤0.05% |
≤0.05% |
Heavy Metals |
≤0.001% |
≤10ppm |
≤15ppm |
≤15ppm |
Iron |
≤0.002% |
≤20ppm |
≤30ppm |
≤30ppm |
Sulfate |
≤0.02% |
≤0.020% |
≤0.03% |
≤0.03% |
Endotoxin |
<50EU/g |
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Arsenic |
≤0.0001% |
≤1ppm |
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Ammonium |
≤0.02% |
≤0.02% |
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Other amino acids |
Conforms |
Meet the requirements |
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Pyrongen |
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Conform |
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Specific Rotation |
-30.0° ~ -32.5° |
-30.0° ~ -32.5° |
-29.4°~-32.8° |
-29.4°~ -32.8° |
Organic impurities |
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Conforms |