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Products & Services |
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L-Leucine |
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Corn starch is powder through flooding, broken, separate, refining and dry from corn as raw materials, the color and luster is pure white, the smell is pure, widely used in food, medicine, starch deep processing, chemical industry,etc. |
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| FCC4 |
| Item |
Limit |
Result |
| Assay |
≥98.5% |
99.0% |
| pH |
5.5～7.0 |
6.03 |
| Specific rotation[a]D20 |
+14.9°～+16.5° |
+15.13° |
| Iron |
≤50ppm |
<50ppm |
| Heavy metals |
≤30ppm |
<30ppm |
| Lead(Pb) |
≤10ppm |
<10ppm |
| Arsenic(As) |
≤ 3ppm |
<3ppm |
| Loss on drying |
≤0.10% |
0.06% |
| Residue on ignition |
≤0.10% |
0.04% |
| AJI92 |
| Item |
Limit |
Result |
| Assay |
99.0～100.5% |
99.9% |
| pH |
5.5～6.5 |
5.6 |
| Specific rotation[a]D20 |
+14.9°～+16.0° |
+15.6° |
| State of solution |
clear & colorless |
clear & colorless |
| (Transmittance T430) |
≥98.0% |
98.8% |
| Chloride(Cl) |
≤0.020% |
<0.020% |
| Ammonium(NH4) |
≤0.02% |
<0.02% |
| Sulfate(SO4) |
≤0.020% |
<0.020% |
| Iron(Fe) |
≤10ppm |
<10ppm |
| Heavy metals(as Pb) |
≤10ppm |
<10ppm |
| Arsenic(As2O3) |
≤1ppm |
<1ppm |
| Other amino acids |
conform |
conform |
| Loss on drying |
≤0.20% |
0.11% |
| Residue on ignition |
≤0.10% |
0.07% |
| USP24 |
| Item |
Limit |
Result |
| Assay |
98.5～101.5% |
99.8% |
| pH |
5.5～7.0 |
6.0 |
| Specific rotation[a]D20 |
+14.9°～+17.3° |
+15.7° |
| Chloride |
≤0.05% |
<0.05% |
| Sulfate |
≤0.03% |
<0.03% |
| Iron |
≤30ppm |
<30ppm |
| Heavy metals |
≤15ppm |
<15ppm |
| Arsenic(AS) |
≤1.5ppm |
<1.5ppm |
| Loss on drying |
≤0.20% |
0.12% |
| ?Residue on ignition |
≤0.40% |
0.01% |
| Organic volatile impurities |
conform |
conform |
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