Quercetin, with the molecular formula C15H10O7 and a molecular weight of 302.23 g/mol, is a phytochemical classified as an other reference substance for high-performance liquid chromatography (HPLC). It has a complex structure, as indicated by its IUPAC name, 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxychromen-4-one, and SMILES notation, C1=CC(=C(C=C1C2=C(C(=O)C3=C(C=C(C=C3O2)O)O)O)O)O. This compound sublimates and melts at temperatures between 601 to 603 degrees Fahrenheit. The GHS signal word for quercetin is Danger, indicating potential hazards associated with this substance. According to the hazard statements,

• CAS Number: 117-39-5
• Molecular Formula: C15H10O7
• Molecular Weight: 302.23
• Exact Mass: 302.04265265
• Boiling Point: Sublimes (NTP, 1992)
• Melting Point: 601 to 603 °F (NTP, 1992)
• GHS Signal Word: Danger
• Hazard Statements:
• H301 (97.3%): Toxic if swallowed [Danger Acute toxicity, oral]