D-Aspartic acid
City: LV, Marupe
Please avoid sudden changes in temperature and humidity, as they may affect the condition of derivative ingredients and tablets.
The shelf life begins from the date of manufacture at the factory.
Taking into account logistical and transportation stages, the remaining shelf life of the product is always shorter than the full shelf life.
We ship products to our customers with a remaining shelf life of no less than 70%.
Physical & Chemical Characteristics
Analysis Item | Specification | Result |
Appearance | White crystals or crystalline powder | Conforms |
Assay | 98.5% – 101.0% | 99.2% |
pH | 2.5 – 3.5 | 2.92 |
State of Solution | Clear and colorless | Clear and colorless |
Transmittance | ≥98.0% | 98.8% |
Specific Rotation [α]D20 | -24.0° – -26.0° | -24.6° |
Loss on Drying | ≤0.20% | 0.14% |
Residue on Ignition | ≤0.10% | 0.07% |
Chloride (Cl) | ≤0.02% | 0.02% |
Ammonium (NH₄) | ≤0.02% | 0.02% |
Sulphate (SO₄) | ≤0.020% | 0.02% |
Iron (Fe) | ≤10 ppm | <10 ppm |
Heavy metals, as Pb | ≤10 ppm | <10 ppm |
Arsenic (As₂O₃) | ≤1 ppm | <1 ppm |
Other amino acids | Not detectable | Conforms |