Structure of 2,3-Dimethylphenylboronic Acid (CAS NO.183158-34-1):

IUPAC Name: (2,3-dimethylphenyl)boronic acid 
Empirical Formula: C₈H₁₁BO₂
Molecular Weight: 149.9827 
Index of Refraction: 1.523
Molar Refractivity: 42.53 cm³
Molar Volume: 139.2 cm³
Polarizability: 16.86×10^-24cm³
Surface Tension: 39.1 dyne/cm
Density: 1.07 g/cm³
Flash Point: 142.8 °C
Enthalpy of Vaporization: 58.45 kJ/mol 
Melting Point: 174-180 °C(lit.)
Boiling Point: 312.6 °C at 760 mmHg
Vapour Pressure: 0.000224 mmHg at 25°C 
Product Categories: blocks;BoronicAcids;Boronic Acid series;Aryl;Organoborons;B (Classes of Boron Compounds);Boronic Acids;Boronic acid;Boronic Acids;Boronic Acids and Derivatives

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

  2,3-Dimethylphenylboronic Acid , its cas register number is 183158-34-1. It also can be called Boronicacid, (2,3-dimethylphenyl)- (9CI) ; Boronicacid, B-(2,3-dimethylphenyl)- .