Complies with the requirements of the current Chinese Pharmacopoeia (ChP), United States Pharmacopeia (USP), British Pharmacopoeia (BP), European Pharmacopoeia (EP), Japanese Pharmacopoeia (JP), and relevant standards for food, feed and other products.

• Molecular formula: C₆H₆N₂O

• Molecular weight: M=112.13

• CAS：98-92-0

• Chemical formula: