Cytosine
Compounds
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Cytosine is one of the four nucleobases found in DNA and RNA, along with adenine, guanine, and thymine. It is a pyrimidine derivative, with a heterocyclic aromatic ring and two substituents attached. The nucleoside of cytosine is cytidine. In... Wikipedia
Formula: C4H5N3O
Molar mass: 111.1 g/mol
3D model (JSmol): Interactive image
Acidity (pKa): 4.45 (secondary), 12.2 (primary)
Melting point: 320 to 325 °C (608 to 617 °F; 593 to 598 K) (decomposes)
PubChem CID: 597