Features Specifications:Sell L-Valine  Product name: L-Valine Batch No. Production date:  Report date Shelf life: 2years Description: White crystals or crystalline powder,  slightly bitter taste. Identification: Conform (IR) Specifications: Item Limit Result Assay 98.5--101.5% 99.8%  pH 5.5--7.0 5.8 Specific rotation[a]D20 +26.6°-- +28.8° +28.2° Chloride(Cl) ≤0.05% Sulfate(SO4) ≤0.03% Iron(Fe) ≤30ppm Heavy metals(Pb) ≤15ppm Loss on drying ≤0.30% 0.08% Residue on ignition ≤0.10% 0.02% Organic volatile impurities conform conform   Conclusion Passed test according to the  Standard of USP24. If you are interested in our products, please feel free to contact with us.