A summary of the most common chemical descriptors (InChI Key and SMILES codes) for 1H-pyrazole-5-carbonitrile are summarized together with 3D and 2D structures and relevant physico-chemical properties.

What is 1H-pyrazole-5-carbonitrile?

The molecule 1H-pyrazole-5-carbonitrile presents a molecular formula of C4H3N3 and its IUPAC name is 1H-pyrazole-5-carbonitrile.

3D structure

Cartesian coordinates

Geometry of 1H-pyrazole-5-carbonitrile in x, y and z coordinates (Å units) to copy/paste elsewhere. Generated with Open Babel software.

2D drawing


1H-pyrazole-5-carbonitrile YMJLEPMVGQBLHL-UHFFFAOYSA-N chemical compound 2D structure molecule svg


Molecule descriptors

IUPAC name1H-pyrazole-5-carbonitrile
InChI codeInChI=1S/C4H3N3/c5-3-4-1-2-6-7-4/h1-2H,(H,6,7)

Physico-Chemical properties

IUPAC name1H-pyrazole-5-carbonitrile
Molecular formulaC4H3N3
Molecular weight93.09
Melting point (ºC)
Boiling point (ºC)
Density (g/cm3)
Molar refractivity
Topological polar surface area52.5

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.