L-Tryptophan
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 | White crystalline powder |
Identification | Conforms to standard spectrum | Conforms |
Assay | 98.5% ~ 101.5% | 99.40% |
Specific Optical Rotation [α]D20 | -29.7° ~ -32.7° | -30.8° |
pH | 5.5 ~ 7.0 | 5.97 |
Chloride (Cl) | <0.05% | <0.05% |
Sulfate (SO4) | <0.03% | <0.03% |
Organic Volatile Impurities | Meets the requirements | Conforms |
Heavy Metals & Impurities
Analysis Item | Specification | Result |
Heavy Metals (as Pb) | <15 ppm | <15 ppm |
Iron (as Fe) | <30 ppm | <30 ppm |
Lead | <1 ppm | <1 ppm |
Mercury | <1 ppm | <1 ppm |
Cadmium | <0.5 ppm | <0.5 ppm |
Arsenic | <1 ppm | <1 ppm |
Additional Characteristics
Analysis Item | Specification | Result |
Loss on Drying | <0.3% | 0.06% |
Residue on Ignition | <0.1% | 0.05% |
Microbiological Tests
Analysis Item | Specification | Result |
Total Plate Count | <1000 cfu/g | <1000 cfu/g |
Yeast & Mold | <100 cfu/g | <100 cfu/g |
Salmonella | Negative | Conforms |
Staphylococcus Aureus | Negative | Conforms |
Enterobacteriaceae | <10 cfu/g | <10 cfu/g |
Conclusion
This batch is conforming with the standard of USP30.