The Benzofurazan, with the CAS registry number 273-09-6, is also known as Benzo-2,1,3-oxadiazole. It belongs to the product categories of Miscellaneous; Fused Ring Systems; Benzofurans; Building Blocks; Heterocyclic Building Blocks. This chemical's molecular formula is C₆H₄N₂O and molecular weight is 120.11. What's more, its systematic name is 2,1,3-benzoxadiazole. Its classification code is Drug/Therapeutic Agent. 

Physical properties of Benzofurazan are: (1)ACD/LogP: 1.69; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.69; (4)ACD/BCF (pH 5.5): 11.33; (5)ACD/KOC (pH 5.5): 197.86; (6)#H bond acceptors: 3; (7)#H bond donors: 0; (8)#Freely Rotating Bonds: 0; (9)Polar Surface Area: 38.92 Å²; (10)Index of Refraction: 1.619; (11)Molar Refractivity: 32.57 cm³; (12)Molar Volume: 92.7 cm³; (13)Surface Tension: 55.5 dyne/cm; (14)Density: 1.294 g/cm³; (15)Flash Point: 70.8 °C; (16)Enthalpy of Vaporization: 40.49 kJ/mol; (17)Boiling Point: 186 °C at 760 mmHg; (18)Vapour Pressure: 0.929 mmHg at 25°C.

Preparation: this chemical can be prepared by benzo[1,2,5]oxadiazole 1-oxide, 2-triphenylphosphoranylidene-proπonic acid methyl ester by heating. This reaction will need solvent benzene with the reaction time of 6 hours. The yield is about 45%.

Uses of Benzofurazan: it can be used to produce 4-nitro-benzo[1,2,5]oxadiazole at the ambient temperature. It will need reagent conc. H₂SO₄, fuming HNO₃ with the reaction time of 30 min. The yield is about 76%.

When you are using this chemical, please be cautious about it as the following:
It is harmful if swallowed. You should not breathe dust. When using it, you need avoid contacting with skin and eyes.

You can still convert the following datas into molecular structure:
(1)SMILES: n1onc2ccccc12
(2)InChI: InChI=1S/C6H4N2O/c1-2-4-6-5(3-1)7-9-8-6/h1-4H
(3)InChIKey: AWBOSXFRPFZLOP-UHFFFAOYSA-N

The toxicity data is as follows: