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

What is the A-Terpinene?

The molecule A-Terpinene presents a molecular formula of C10H16 and its IUPAC name is α,α,-dichlorotoluene.

A-Terpinene is a molecule that belongs in many essential oils. It is a terpene, which is a type of organic compound that is produced by plants. A-Terpinene has a strong, fresh, and citrusy aroma. It is used in many different products, including perfumes, cosmetics, and cleaning products. A-Terpinene is also used as a flavoring agent in food and beverages..

3D structure

Cartesian coordinates

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

2D drawing


A-Terpinene YHQGMYUVUMAZJR-UHFFFAOYSA-N chemical compound 2D structure molecule svg


Molecule descriptors

IUPAC nameα,α,-dichlorotoluene
InChI codeInChI=1S/C4H10O2/c1-4(5-2)6-3/h4H,1-3H3

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 nameα,α,-dichlorotoluene
Molecular formulaC10H16
Molecular weight136.234
Melting point (ºC)-
Boiling point (ºC)174
Density (g/cm3)0.840
Molar refractivity47.12
Topological polar surface area18.5

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.