L-Aspartic acid

CAS Registry Number®

56-84-8

CAS Name

L-Aspartic acid

Molecular Formula

C4H7NO4

Molecular Mass

133.10

Cite this Page

L-Aspartic acid.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/ChemicalDetail.aspx?ref=56-84-8 (retrieved 2025-07-08) (CAS RN: 56-84-8).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Melting Point (1)

    270-271 °C

  • Density (1)

    1.661 g/cm³ @ Temp: 12.5 °C

Source(s)

  • (1) Hazardous Substances Data Bank data were obtained from the National Library of Medicine (US)

Other Names and Identifiers

InChI

InChI=1S/C4H7NO4/c5-2(4(8)9)1-3(6)7/h2H,1,5H2,(H,6,7)(H,8,9)/t2-/m0/s1

InChIKey

InChIKey=CKLJMWTZIZZHCS-REOHCLBHSA-N

SMILES

[C@H](CC(O)=O)(C(O)=O)N

Canonical SMILES

O=C(O)CC(N)C(=O)O

Other Names for this Substance

  • L-Aspartic acid
  • Aspartic acid, L-
  • L-Aminosuccinic acid
  • Asparagic acid
  • Asparaginic acid

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Deleted or Replaced CAS Registry Numbers

6899-03-2, 181119-33-5, 2139279-07-3

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