Urea

CAS Registry Number®

57-13-6

CAS Name

Urea

Molecular Formula

CH4N2O

Molecular Mass

60.06

Cite this Page

Urea.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/ChemicalDetail.aspx?ref=57-13-6 (retrieved 2025-07-08) (CAS RN: 57-13-6).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Boiling Point (1)

    317-389 °C

  • Melting Point (2)

    132.70 °C

  • Density (2)

    1.3230 g/cm³ @ Temp: 20 °C

Source(s)

Other Names and Identifiers

InChI

InChI=1S/CH4N2O/c2-1(3)4/h(H4,2,3,4)

InChIKey

InChIKey=XSQUKJJJFZCRTK-UHFFFAOYSA-N

SMILES

C(N)(N)=O

Canonical SMILES

O=C(N)N

Other Names for this Substance

  • Urea
  • Carbamide
  • UR
  • Isourea
  • Carbamimidic acid

View All

Deleted or Replaced CAS Registry Numbers

30535-50-3, 41488-96-4, 118548-06-4, 860639-56-1, 923953-70-2, 1202865-46-0, 1228376-38-2, 1262769-89-0, 1637232-71-3, 2060607-07-8, 2417243-36-6, 2694035-40-8

CAS INSIGHTSTM
Aspergillus fungus, computer illustration. This is a toxic fungus that causes diseases in humans.