The 2-Chloro-3-nitropyridin-4-ol, with CAS registry number 629655-23-8, has the systematic name of 4-pyridinol, 2-chloro-3-nitro-. And it is also called 2-Chloro-3-nitropyridin-4-ol, min. 95 %.

Physical properties about this chemical are: (1)# of Rule of 5 Violations: 0; (2)ACD/BCF (pH 5.5): 1; (3)ACD/BCF (pH 7.4): 1; (4)ACD/KOC (pH 5.5): 1; (5)ACD/KOC (pH 7.4): 1; (6)#H bond acceptors: 5; (7)#H bond donors: 1; (8)#Freely Rotating Bonds: 2; (9)Polar Surface Area: 78.94 Å²; (10)Index of Refraction: 1.637; (11)Molar Refractivity: 37.66 cm³; (12)Molar Volume: 104.8 cm³; (13)Polarizability: 14.93×10^-24cm³; (14)Surface Tension: 74.1 dyne/cm; (15)Enthalpy of Vaporization: 68.59 kJ/mol; (16)Vapour Pressure: 3.01E-07 mmHg at 25°C.

You can still convert the following datas into molecular structure: 
(1)SMILES: c1cnc(c(c1O)[N+](=O)[O-])Cl
(2)InChI: InChI=1/C5H3ClN2O3/c6-5-4(8(10)11)3(9)1-2-7-5/h1-2H,(H,7,9)
(3)InChIKey: RGJVVCCIZKLJRL-UHFFFAOYAM
(4)Std. InChI: InChI=1S/C5H3ClN2O3/c6-5-4(8(10)11)3(9)1-2-7-5/h1-2H,(H,7,9)
(5)Std. InChIKey: RGJVVCCIZKLJRL-UHFFFAOYSA-N