1. Medicine Grade Riboflavin ( Vitamin B2) Standard: CP2000/USP24/BP1998 95% tabletting riboflavin particle Package: 20KGS/PC2. Feed Grade Riboflavin ( Vitamin B2) 96initial powder, 80 riboflavin fluid particle, national standard of PRCPackage: 20KGS/PC3. Medicine Grade Riboflavin ( sodium phosphate) Standard: CP2000/USP24/BP1998/JP13 Package: 10KGS/PC