Molecular Structure of 4-Methyl-2H-1,4-benzoxazin-3(4H)-one (CAS No.21744-84-3):

Molecular Formula: C₉H₉NO₂  
Molecular Weight: 163.1733
CAS No: 21744-84-3
H bond acceptors: 3
H bond donors: 0
Freely Rotating Bonds: 0
Polar Surface Area: 29.54 Ų
Index of Refraction: 1.563
Molar Refractivity: 43.82 cm³
Molar Volume: 134.8 cm³
Surface Tension: 42.5 dyne/cm
Density: 1.209 g/cm³
Flash Point: 177.3 °C
Enthalpy of Vaporization: 61.63 kJ/mol
Boiling Point: 369.5 °C at 760 mmHg
Vapour Pressure: 1.18E-05 mmHg at 25°C
InChI: InChI=1/C₉H₉NO₂/c1-10-7-4-2-3-5-8(7)12-6-9(10)11/h2-5H,6H2,1H3
InChIKey: DBJMEBUKQVZWMD-UHFFFAOYAK
Std. InChI: InChI=1S/C₉H₉NO₂/c1-10-7-4-2-3-5-8(7)12-6-9(10)11/h2-5H,6H2,1H3
Std. InChIKey: DBJMEBUKQVZWMD-UHFFFAOYSA-N
IUPAC Name: 4-Methyl-1,4-benzoxazin-3-one  
Product Categories: Miscellaneous;API intermediates;Benzoxazines;Building Blocks;Heterocyclic Building Blocks

Hazard Codes: Xi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36-37/39
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing. 
S37/39:Wear suitable gloves and eye/face protection.
WGK Germany: 3

   4-Methyl-2H-1,4-benzoxazin-3(4H)-one (CAS No.21744-84-3), its synonyms are 2H-1,4-Benzoxazin-3(4H)-one, 4-methyl- ; 6-Methyl-2H-1,4-benzoxazin-3(4H)-one .