AOGUBIO 99% VCE 3-O-Ethyl-L-Ascorbic Acid Ethyl Ascorbic Acid Powder Packing: 1kg/bag, 25kgs/drum. Two plastic bags inside and Paper-drums or per customer's requirements. Storage: Stored in tight, light-resistant containers, avoid exposure to direct sunlight, moisture and excessive heat. Shelf Life: 24 months when properly stored.