The 4-Hydroxypyridine, with the CAS registry number of 626-64-2, is also known as 4-Pyridinol. It belongs to the product categories of Pyridine; Heterocyclic Compounds; Pyridines. Its EINECS registry number is 210-958-3. This chemical's molecular formula is C₅H₅NO and molecular weight is 95.1. What's more, its IUPAC name is 1H-Pyridin-4-one. In addition, it should be stored in dry, cool, airtight place. And it should avoid contact with oxidant, otherwise it would decompose.

Physical properties about 4-Hydroxypyridine are: (1)ACD/LogP: -0.99; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -1; (4)ACD/LogD (pH 7.4): -0.99; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 6.82; (8)ACD/KOC (pH 7.4): 6.86; (9)#H bond acceptors: 2; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 20.31 Å²; (13)Index of Refraction: 1.513; (14)Molar Refractivity: 25.74 cm³; (15)Molar Volume: 85.5 cm³; (16)Polarizability: 10.2×10^-24 cm³; (17)Surface Tension: 35.7 dyne/cm; (18)Density: 1.111 g/cm³; (19)Flash Point: 107.8 °C; (20)Enthalpy of Vaporization: 44.06 kJ/mol; (21)Boiling Point: 204.3 °C at 760 mmHg; (22)Melting Point: 150-151 °C(lit. ); (23)Vapour Pressure: 0.265 mmHg at 25 °C.

Preparation: this chemical is prepared by 4-Methoxy-pyridine. The reaction needs reagents Hexamethyldisilathiane and Sodium methoxide. The reaction time is 24 hours with reaction temperature of 180 °C. The yield is about 60 %.

Uses: (1)it can be used as intermediate to synthetic diuretic drug Torasemide or other drugs; (2)it is used to produce other chemicals. For example, it is used to produce 3-Nitro-pyridin-4-ol at heating. This reaction needs reagents HNO₃, H₂SO₄ and SO₃. Other condition of this reaction is reaction time of 1 hour. The yield is about 72 %.

When you are using this chemical, please be cautious about it as the following:
As a chemical, it is irritating to eyes, respiratory system and skin. In addition, this chemical may cause inflammation to the skin or other mucous membranes. During using it, wear suitable protective clothing, gloves and eye/face protection. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

You can still convert the following datas into molecular structure:
(1) SMILES: O=C\1\C=C/N/C=C/1
(2) InChI: InChI=1/C5H5NO/c7-5-1-3-6-4-2-5/h1-4H,(H,6,7)
(3) InChIKey: GCNTZFIIOFTKIY-UHFFFAOYAB