1H-Benzotriazole

Empirical Formula: C₆H₅N₃
Molecular Weight: 119.124
Nominal Mass: 119 Da
Average Mass: 119.124 Da
Monoisotopic Mass: 119.048347 Da 
EINECS: 202-394-1 
Index of Refraction: 1.715
Molar Refractivity: 34.71 cm³
Molar Volume: 88.3 cm³
Surface Tension: 73.9 dyne/cm
Density: 1.348 g/cm³
Flash Point: 133.9 °C
Enthalpy of Vaporization: 51.46 kJ/mol
Boiling Point: 276.1 °C at 760 mmHg
Vapour Pressure: 0.00491 mmHg at 25 °C
Melting point: 97-99 °C(lit.)
Water solubility: 025 g/l in water (20 °C)
Appearance: White to light tan crystals or white powder
Structure of 1H-Benzotriazole (CAS NO.95-14-7):
                       
IUPAC Name: 2H-Benzotriazole
Canonical SMILES: C1=CC2=NNN=C2C=C1
InChI: InChI=1S/C6H5N3/c1-2-4-6-5(3-1)7-9-8-6/h1-4H,(H,7,8,9)
InChIKey: QRUDEWIWKLJBPS-UHFFFAOYSA-N
Product Category of 1H-Benzotriazole (CAS NO.620-17-7): Industrial/Fine Chemicals;Heterocyclic Compounds;Imidaxoles;Copper corrosion inhibitor;Organic Chemicals

It is produced by reaction of o-phenylenediamine, sodium nitrite and acetic acid. The conversion proceeds via diazotization of one of the amine groups.

 1H-Benzotriazole (CAS NO.95-14-7) is used as a corrosion inhibitor, an aircraft deicer and anti-icer fluid as well as for silver protection in dishwashing detergents.

  1H-Benzotriazole (CAS NO.95-14-7) hasn't been listed as a carcinogen by NTP, IARC, ACGIH, or CA Prop 65. And the toxicological properties have not been fully investigated. You can see actual entry in RTECS for complete information.

Hazard Codes: Xn,Xi,F
Risk Statements: 20/22-36-52/53-5-36/37/38-20/21/22-11
R11:Highly flammable. 
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed. 
R20/22:Harmful by inhalation and if swallowed. 
R36/37/38:Irritating to eyes, respiratory system and skin. 
R36:Irritating to eyes. 
R52/53:Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: 26-36/37-61-45-36/37/39-28A 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S28:After contact with skin, wash immediately with plenty of soap-suds.
S36/37:Wear suitable protective clothing and gloves. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.

 1H-Benzotriazole , its cas register number is 95-14-7. It also can be called 1,2,3-Benzotriazole ; Benzotriazole ; 1,2,-Aminozophenylene ; and Azimidobenzene . It is hazardous, so the first aid measures and others should be known. Such as: When on the skin: first, should flush skin with plenty of water immediately for at least 15 minutes while removing contaminated clothing. Secondly, get medical aid. Or in the eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Then get medical aid soon. While, it's inhaled: Remove from exposure and move to fresh air immediately. Give artificial respiration while not breathing. When breathing is difficult, give oxygen. And as soon as to get medical aid. Then you have the ingesting of the product: Wash mouth out with water, and get medical aid immediately. Notes to physician: Treat supportively and symptomatically.
In addition, 1H-Benzotriazole (CAS NO.95-14-7) is light sensitive. Dusts may form an explosion hazard. It is not compatible with strong oxidizing agents, heavy metals, and you must not take it with incompatible materials, light, ignition sources, heat. And also prevent it to broken down into hazardous decomposition products: Nitrogen oxides, carbon monoxide, carbon dioxide.