IUPAC Name: (4-ethylsulfanylphenyl)boronic acid 
Empirical Formula: C₈H₁₁BO₂S
Molecular Weight: 182.0477 
Structure of 4-Ethylthiophenylboronic acid (CAS NO.145349-76-4):

Index of Refraction: 1.571
Molar Refractivity: 50.55 cm³
Molar Volume: 153.7 cm³
Polarizability: 20.04×10^-24cm³
Surface Tension: 46.9 dyne/cm
Density: 1.18 g/cm³
Flash Point: 161.6 °C
Enthalpy of Vaporization: 61.99 kJ/mol 
Melting Point: 104-106°C
Boiling Point: 343.5 °C at 760 mmHg
Vapour Pressure: 2.68E-05 mmHg at 25°C 
Product Categories: blocks;BoronicAcids;Boronic acids;Boronic Acid 
Canonical SMILES: B(C1=CC=C(C=C1)SCC)(O)O
InChI: InChI=1S/C8H11BO2S/c1-2-12-8-5-3-7(4-6-8)9(10)11/h3-6,10-11H,2H2,1H3
InChIKey: LMUASBOUSAMURX-UHFFFAOYSA-N

Hazard Codes: Xi,F
Risk Statements: 36/37/38-37-11 
R36/37/38:Irritating to eyes, respiratory system and skin. 
R37:Irritating to respiratory system 
R11:Highly flammable.
Safety Statements: 26-36-33-29-16-7/9 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing. 
S33:Take precautionary measures against static discharges. 
S29:Do not empty into drains. 
S16:Keep away from sources of ignition. 
S7:Keep container tightly closed. 
S9:Keep container in a well-ventilated place.
Hazard Note: Irritant

  4-Ethylthiophenylboronic acid , its cas register number is 145349-76-4. It also can be called [4-(Ethylsulfanyl)phenyl]boronic acid ; Boronic acid, B-[4-(ethylthio)phenyl]- ; 4-(Ethylthio)benzeneboronic acid .