Molecular Structure:

Molecular Formula: C₈H₈O₄
Molecular Weight: 168.1467
IUPAC Name: 2,5-Dimethoxycyclohexa-2,5-diene-1,4-dione
Synonyms of 2,5-Dimethoxybenzo-1,4-quinone (CAS NO.3117-03-1): 2,5-Dimethoxy-4-benzoquinone ; 2,5-Dimethoxy-1,4-benzoquinone ; 2,5-Dimethoxy-p-benzoquinone ; 2,5-Dimethoxybenzoquinone ; AI3-31839 ; NSC 509720 ; 2,5-Cyclohexadiene-1,4-dione, 2,5-dimethoxy- (9CI) ; p-Benzoquinone, 2,5-dimethoxy- (8CI)
CAS NO: 3117-03-1
Product Categories: Anthraquinones, Hydroquinones and Quinones ; Benzoquinones ; Benzoquinones, etc. (Charge Transfer Complexes) ; Charge Transfer Complexes for Organic Metals ; Functional Materials 
Index of Refraction: 1.503
Molar Refractivity: 40.11 cm³
Molar Volume: 135.5 cm³
Surface Tension: 39.3 dyne/cm
Density: 1.24 g/cm³
Flash Point: 139.2 °C
Enthalpy of Vaporization: 55.2 kJ/mol
Boiling Point: 311.1 °C at 760 mmHg
Vapour Pressure of 2,5-Dimethoxybenzo-1,4-quinone (CAS NO.3117-03-1): 0.000576 mmHg at 25°C

Risk Statements of 2,5-Dimethoxybenzo-1,4-quinone (CAS NO.3117-03-1): 36/37/38 
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36: Wear suitable protective clothing.