A summary of the most common chemical descriptors (InChI Key and SMILES codes) for 8-Hydroxyquinoline are summarized together with 3D and 2D structures and relevant physico-chemical properties.

What is the 8-Hydroxyquinoline?

The molecule 8-Hydroxyquinoline presents a molecular formula of C9H7NO and its IUPAC name is 8-hydroxyquinoline.

8-Hydroxyquinoline is a molecule with the chemical formula C9H7NO. It is a white solid that is soluble in water and organic solvents. It is used as a corrosion inhibitor, a chelating agent, and a precursor to other chemicals..

8-Hydroxyquinoline was first synthesized in 1887 by the German chemist Emil Fischer. It is produced by the oxidation of quinoline with nitric acid. It is also produced by the reaction of hydroxylamine with quinoline..

8-Hydroxyquinoline is used as a corrosion inhibitor in metalworking fluids and in boiler water. It is also used as a chelating agent for metals such as iron, copper, and zinc. It is used in the production of dyes, rubber chemicals, and pharmaceuticals..

8-Hydroxyquinoline is a strong base. It reacts with acids to form salts. It is corrosive to metals and is a skin and eye irritant..

3D structure

Cartesian coordinates

Geometry of 8-Hydroxyquinoline in x, y and z coordinates (Å units) to copy/paste elsewhere. Generated with Open Babel software.

2D drawing


8-Hydroxyquinoline MCJGNVYPOGVAJF-UHFFFAOYSA-N chemical compound 2D structure molecule svg


Molecule descriptors

IUPAC name8-hydroxyquinoline
InChI codeInChI=1S/C8H8Cl2/c9-5-7-3-1-2-4-8(7)6-10/h1-4H,5-6H2

Other names (synonyms)

IUPAC nomenclature provides a standardized method for naming chemical compounds. Although this system is widely used in chemistry, many chemical compounds have also other names commonly used in different contexts. These synonyms can come from a variety of sources and are used for a variety of purposes.

One common source of synonyms for chemical compounds is the common or trivial names, assigned on the basis of appearance, properties, or origin of the molecule.

Another source of synonyms are historical or obsolete names employed in the past, however replaced nowadays by more modern or standardized names.

In addition to common and historical names, chemical compounds may also have synonyms that are specific to a particular field or industry.

Reference codes for other databases

There exist several different chemical codes commonly used in orded to identify molecules:

Physico-Chemical properties

IUPAC name8-hydroxyquinoline
Molecular formulaC9H7NO
Molecular weight145.158
Melting point (ºC)74
Boiling point (ºC)267
Density (g/cm3)-
Molar refractivity43.77
Topological polar surface area-

LogP and topological polar surface area (TPSA) values were estimated using Open Babel software.

The n-octanol/water partition coeficient (Kow) data is applied in toxicology and drug research. Kow values are used, to guess the environmental fate of persistent organic pollutants. High partition coefficients values, tend to accumulate in the fatty tissue of organisms. Molecules with a log(Kow) (or LogP) greater than 5 are considered to bioaccumulate.

TPSA values are the sum of the surface area over all polar atoms or molecules, mainly oxygen and nitrogen, also including hydrogen atoms.

In medicinal chemistry, TPSA is used to assess the ability of a drug to permeabilise cells.

For molecules to penetrate the blood-brain barrier (and act on receptors in the central nervous system), TPSA values below 90 Å2 are required. Thus, molecules with a polar surface area greater than 140 Å2 tend to be poorly permeable to cell membranes.