IUPAC Name: 6,7-dimethoxy-1H-quinazoline-2,4-dione
Molecular Formula: C₁₀H₁₀N₂O₄
Molecular Weight: 222.20 g/mol
EINECS: 249-288-1 
Melting point 323-325 °C 
Water solubility: insoluble 
Density: 1.312 g/cm³ 
Index of Refraction: 1.552 
Surface Tension: 44.1 dyne/cm
Appearance of 6,7-Dimethoxyquinazoline-2,4-dione (CAS NO.28888-44-0): brown powder
Following is the structure of 6,7-Dimethoxyquinazoline-2,4-dione (CAS NO.28888-44-0):
     

  6,7-Dimethoxyquinazoline-2,4-dione (CAS NO.28888-44-0) hasn't been listed as a carcinogenACGIH, IARC, NTP, or CA Prop 65. And the toxicological properties have not been fully investigated.

Hazard Codes: Xi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-37/39
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S37/39:Wear suitable gloves and eye/face protection.
WGK Germany: 3
HS Code: 29339990

 6,7-Dimethoxyquinazoline-2,4-dione, its cas register number is 28888-44-0. It also can be called 6,7-Dimethoxy-2,4(1H,3H)-quinazolinedione ; 4-Dihydroxy-6,7-dimethoxquinazoline. Its product categories are Quinolines, Quinazolines and derivatives;Quinoline & Isoquinoline;Doxazosin;Building Blocks;Heterocyclic Building Blocks;Quinazolines. 6,7-Dimethoxyquinazoline-2,4-dione (CAS NO.28888-44-0) is incompatible with strong oxidizing agents, acids, acetic anhydride, acid chlorides, carbon dioxide. 6,7-Dimethoxyquinazoline-2,4-dione should avoid the condition of incompatible materials. Its hazardous decomposition products are nitrogen oxides, carbon monoxide, carbon dioxide. Its hazardous polymerization has not been reported.