IUPAC Name: 2H-Benzotriazole-5-carboxylic acid 
Following is the structure of Benzotriazole-5-carboxylic acid (CAS NO.23814-12-2):
                              
Empirical Formula: C₇H₅N₃O₂
Molecular Weight: 163.1335 g/mol
Molar Refractivity: 41.64 cm³
Molar Volume: 100.8 cm³
Density: 1.617 g/cm³
Flash Point: 229.5 °C
Index of Refraction: 1.763
Melting point: 305-307 °C
Surface Tension: 102.8 dyne/cm
Enthalpy of Vaporization: 75.43 kJ/mol
Boiling Point: 455.9 °C at 760 mmHg
Vapour Pressure: 4.18E-09 mmHg at 25 °C
Product Categories: Acids and Derivatives; Heterocycles; Carboxylic Acids; Carboxylic Acids; Fused Ring Systems; Benzotriazoles; Building Blocks; Heterocyclic Building Blocks
Canonical SMILES: C1=CC2=NNN=C2C=C1C(=O)O
InChI: InChI=1S/C7H5N3O2/c11-7(12)4-1-2-5-6(3-4)9-10-8-5/h1-3H,(H,11,12)(H,8,9,10)
InChIKey: GUOVBFFLXKJFEE-UHFFFAOYSA-N

Hazard Codes: Xi
Risk Statements: 36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
WGK Germany: 3
Hazard Note: Harmful

 Benzotriazole-5-carboxylic acid , its cas register number is 23814-12-2. It also can be called Benzotriazole-5-carboxylic acid ; and 1H-1,2,3-Benzotriazole-5-carboxylic acid .