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

What is the Catechol?

The molecule Catechol presents a molecular formula of C6H6O2 and its IUPAC name is catechol.

Catechol is a molecule that is produced by the body as a by-product of the metabolism of the amino acid tyrosine. It is also found in a number of plants, including the Catechu tree. Catechol has a number of important functions in the body, including acting as a precursor to the neurotransmitters dopamine and norepinephrine, and as a coenzyme in the production of the amino acid tryptophan. It is also a powerful antioxidant, and has been shown to protect cells from damage caused by oxidative stress..

3D structure

Cartesian coordinates

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

2D drawing


Catechol YCIMNLLNPGFGHC-UHFFFAOYSA-N chemical compound 2D structure molecule svg


Molecule descriptors

IUPAC namecatechol
InChI codeInChI=1S/C9H18/c1-3-5-9-7-4-6-8(9)2/h8-9H,3-7H2,1-2H3/t8-,9+/m1/s1

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 namecatechol
Molecular formulaC6H6O2
Molecular weight110.111
Melting point (ºC)105
Boiling point (ºC)245
Density (g/cm3)-
Molar refractivity30.49
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.