Vitamin D3 Powder 500 Feed Grade 1.Technical Process Vitamin D3 Powder 500 Feed Grade is obtained from the spray of Vitamin D3 Oil Feed Grade. 2.Main specifications Items Specifications Characteristics Yellowish or yellow-brown granular Granularity 100% passing 2# sieve Content VD3 500,000IU/g min Loss on drying 0.5% max 3.Analysis method of Assay HPLC.Mobile phase,n-hexane:n-pentanol=996:4.Velocity,2.0ml/min. Wavelength,254nm. 4.Usage As additives in feed premixes. 5.Packing 25kg paper cartons lined with food grade PE bags. 6.Stability and storage Stored under dry,cool and dark condition and avoid moisture,water or heat.The shelf life is 12 months.