L-Threonine：
| Products name:L-Threonine |
| CAS NO :72-9-5; 6028-28-0 |
| EINECS NO:200-774-1 |
| Molecular formula: C4H9NO3 |
| Molecular weight: 119.12 |
| Appearance:white orthorhombic system or crystalline powder. Odourless, taste sweet. |
| Solubility:Soluble in water, 25 ℃ solubility is 20.5 g / 100 ml. |
| USES:THR is a kind of important nutrition fortifier, can be fortified cereals, pastries, dairy products, and tryptophan has to restore the body fatigue, promote the effect of the growth and development. Medicine, because of the structure containing hydroxyl threonine, effect on human skin with moisture, combined with oligosaccharide chain, play an important role in protecting cell membrane, can promote the synthesis of phosphate ester and fatty acid oxidation in the body. |
| Standard: USP24 |
| BASIC ANALYSIS | ||
| Item of Analysis | Specification | Results |
| Assay | 98.5%~101.5% | 99.4% |
| Organoleptic | ||
| Appearance | White crystals or crystalline powder | White crystalline powder |
| Odor | Characteristic | Conforms |
| Taste | Characteristic | Conforms |
| Physical Characteristics | ||
| pH | 5.0~6.5 | 5.58 |
| Specific rotation | -26.7°~-29.1° | -27.2° |
| Loss on drying | ≤0.20% | 0.15% |
| Residue on ignition | ≤0.40% | 0.04% |
| Heavy metals | ||
| Heavy metals(Pb) | ≤15ppm | <15ppm |
| Chloride (Cl) | ≤0.05% | <0.05% |
| Arsenic (As2O3) | ≤1PPM | <1ppm |
| Ammonium (NH4) | ≤0.02% | <0.02% |
| Iron(Fe) | ≤0.003% | <0.003% |
| Sulfate (SO4) | ≤0.03% | <0.03% |
| Microbiological Tests | ||
| Total aerobic plate count | ≤1000cfu/g | Conform |
| Yeast & Mold | ≤100cfu/g | Conform |
| E. Coli. | Negative | Conform |
| Salmonella | Negative | Conform |
| Staphylococcus | Negative | Conform |
