CytosineCytosine (symbol C or Cyt) is one of the four nucleotide bases found in DNA and RNA, along with adenine, guanine, and thymine (uracil in RNA). It is a pyrimidine derivative, with a heterocyclic aromatic ring and two substituents attached (an amine group at position 4 and a keto group at position 2). Read from the Chembox of the Wikipedia article Cytosine, revision 1368838451.

Property

Value

Formula

C4H5N3O, 111.10 g/mol

Melting point

322.5 °C

Density

1.55 g/cm³

pKa

4.45

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