Sodium Ascorbate (VC-Na) is used as the supplementary of Vitamin C in case it is not taken enough; It is used as the anti-oxidant in some food and beverage to prevent them from changing color and flavor. If you want a soluble and tasteful vitamin C, VC-Na is a preferable choice. Specifications: 1) Identification: positive reaction 2) Specific rotation: +103 ~ +108° 3) pH: 7.0 ~ 8.0 4) Loss on drying: 0.25% max. 5) Heavy metals: 10ppm max. 6) Organic volatile impurities: pass 7) Assay: 99.0% ~ 101.0% 8) Appearance: white or off-white powder 9) Storage: store in a cool, dry, ventilated area 10) Shelf life: two years in dry conditions after production 11) GMO status: GMO free Packing: Net weight 25kg carton boxes with PE liner