Riboflavin appears as a yellow to orange-yellow crystalline powder. Riboflavin is vitamin B2. It is used as a nutritional supplement and as a yellow-orange food colourant. It is known as E101 in food applications. Its uses include beverages, dairy products and pharmaceutical preparations, combining a nutritional role with its colouring function. Packaging options include 1 kg bags and 25 kg fibre drums. Food use as E 101 is subject to the applicable food-additive specification and permitted-use conditions. Pharmaceutical use requires the applicable pharmacopoeia grade.