Molecular Structure of 2-Naphthaleneboronic acid (CAS NO.204530-94-9):

IUPAC Name: naphthalen-2-ylboronic acid 
Empirical Formula: C₁₀H₉BO₂
Molecular Weight: 171.9883
H bond acceptors: 2
H bond donors: 2
Freely Rotating Bonds: 3
Polar Surface Area: 18.46Ų
Index of Refraction: 1.638
Molar Refractivity: 50.84 cm³
Molar Volume: 141.3 cm³
Surface Tension: 50.4 dyne/cm
Density: 1.21 g/cm³
Flash Point: 184.8 °C
Enthalpy of Vaporization: 66.48 kJ/mol
Boiling Point: 381.9 °C at 760 mmHg
Vapour Pressure: 1.63E-06 mmHg at 25°C
Melting point: 269-275 °C(lit.)
Storage temp: 0-6°C
BRN: 2936449
Appearance: yellow crystal powde
Product Categories: Industrial/Fine Chemicals; Boron Compounds; blocks; BoronicAcids; Boronic Acid series; Boronic acids; Boronic Acid; Naphthalene; Organoborons; B (Classes of Boron Compounds)

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
Hazard Note: Irritant
HazardClass: Irritant

  2-Naphthaleneboronic acid , with CAS number of 204530-94-9, can be called boronic acid, B-2-naphthalenyl- ; naphthalen-2-ylboronic acid ; naphthalen-2-ylboronicacid ; Naphthylene 2-Boronic Acid ; Naphthalene-2-boronic acid . It is a yellow crystal powde.