The 5-Nitrobenzofuran-2-carboxylic acid, with the CAS registry number 10242-12-3, is also known as 2-Carboxy-5-nitrobenzofuran. This chemical's molecular formula is C₉H₅NO₅ and molecular weight is 207.14. What's more, its systematic name is 5-nitro-1-benzofuran-2-carboxylic acid.

Physical properties of 5-Nitrobenzofuran-2-carboxylic acid are: (1)ACD/LogP: 2.14; (2)# of Rule of 5 Violations: 0; (3)ACD/BCF (pH 5.5): 1; (4)ACD/BCF (pH 7.4): 1; (5)ACD/KOC (pH 5.5): 1; (6)ACD/KOC (pH 7.4): 1; (7)#H bond acceptors: 6; (8)#H bond donors: 1; (9)#Freely Rotating Bonds: 2; (10)Polar Surface Area: 85.26 Å²; (11)Index of Refraction: 1.688; (12)Molar Refractivity: 49.87 cm³; (13)Molar Volume: 130.7 cm³; (14)Polarizability: 19.77×10^-24cm³; (15)Surface Tension: 73.4 dyne/cm; (16)Density: 1.584 g/cm³; (17)Flash Point: 204.2 °C; (18)Enthalpy of Vaporization: 70.31 kJ/mol; (19)Boiling Point: 414 °C at 760 mmHg; (20)Vapour Pressure: 1.35E-07 mmHg at 25°C.

Preparation of 5-Nitrobenzofuran-2-carboxylic acid: this chemical can be prepared by (2-formyl-4-nitro-phenoxy)-acetic acid at the temperature of 110 °C. This reaction will need reagents AcONa, Ac₂O with the reaction time of 3 hours. The yield is about 73.9%.

Uses of 5-Nitrobenzofuran-2-carboxylic acid: it can be used to produce 5-[(5-nitro-benzofuran-2-carbonyl)-amino]-1H-indole-2-carboxylic acid ethyl ester at the temperature of 20 °C. It will need reagent 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and solvents dimethylformamide, tetrahydrofuran. The yield is about 52%.

When you are using this chemical, please be cautious about it as the following:
It is irritating to eyes, respiratory system and skin. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. When using it, you need wear suitable protective clothing, gloves and eye/face protection.

You can still convert the following datas into molecular structure:
(1)Canonical SMILES: C1=CC2=C(C=C1[N+](=O)[O-])C=C(O2)C(=O)O
(2)InChI: InChI=1S/C9H5NO5/c11-9(12)8-4-5-3-6(10(13)14)1-2-7(5)15-8/h1-4H,(H,11,12)
(3)InChIKey: LZKWLHXJPIKJSJ-UHFFFAOYSA-N