Pyrimidine (C₄H₄N₂)

Pyrimidine (C₄H₄N₂)

A heterocyclic organic compound, its derivatives are thymine, cytosine and uracil.



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Pyrimidine C₄H₄N₂


Molar mass: 80.09 g/mol

Melting point: 22 °C (71.6 °F)

Boiling point: 123 °C (253.4 °F)


Pyrimidine is a colorless, solid substance with a distinctive odor. It dissolves well in water, its aqueous solution has a neutral pH. It is a weaker base than pyridine. It forms salts with acids.

Occurrence and production

The derivatives of pyrimidine are often highly important substances biologically, such as vitamins and alkaloids. Nucleic acids and other nucleotide compounds are made up of organic bases containing nitrogen. Thymine, cytosine and uracil are derivatives of pyrimidine.


Pyrimidine is used in the manufacture of medicines.

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Purine (C₅H₄N₄)

A heterocyclic aromatic organic compound, its derivatives include guanine and adenine.


Carrier of genetic information in cells.

Organization of genetic material

Eukaryotic cells with nuclei measuring only a few micrometers may contain nearly 2 meters (6.6 ft) of DNA, coiled multiple times.


A polynucleotid made up of phosphoric acid, ribose, and nucleobases (cytosine, uracil, adenine and guanine).

Aniline (C₆H₅NH₂)

The simplest aromatic amine. Its scientific name is phenylamine.

Benzene (C₆H₆)

Benzene is the simplest aromatic hydrocarbon.

Beta-D-ribose (C₅H₁₀O₅)

A crystalline compound found in nucleic acids, coenzymes, nucleotides and nucleosides.

Covalent bonds in benzene molecules

In benzene there are sigma bonds and delocalized pi bonds between carbon atoms.

Imidazole (C₃H₄N₂)

A biologically and practically important organic compound.

Naphtalene (C₁₀H₈)

The simplest polycyclic aromatic hydrocarbon.

Pyridine (C₅H₅N)

A basic heterocyclic organic compound; a colorless, pungent toxic liquid.

Pyrrole (C₄H₅N)

A heterocyclic organic compound.

Styrene (vinyl benzene) (C₈H₈)

A colorless liquid with an odor similar to benzene. The monomer of polystyrene.


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2-deoxy-beta-D-ribose (C₅H₁₀O₄)

A component of DNA, it contains one less hydroxyl group than β-D-ribose.

Benzoic acid (C₆H₅COOH)

The simplest of the aromatic carboxylic acids.

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