Lewisite

CAS Registry Number®

541-25-3

CAS Name

Lewisite

Molecular Formula

C2H2AsCl3

Molecular Mass

207.32

Cite this Page

Lewisite.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=541-25-3 (retrieved 2025-03-28) (CAS RN: 541-25-3).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Boiling Point (1)

    30-35 °C @ Press: 4 Torr

  • Melting Point (2)

    0.1 °C

  • Density (2)

    1.888 g/cm³ @ Temp: 20 °C

Source(s)

Other Names and Identifiers

InChI

InChI=1S/C2H2AsCl3/c4-2-1-3(5)6/h1-2H

InChIKey

InChIKey=GIKLTQKNOXNBNY-UHFFFAOYSA-N

SMILES

C([As](Cl)Cl)=CCl

Canonical SMILES

ClC=C[As](Cl)Cl

Other Names for this Substance

  • Arsonous dichloride, As-(2-chloroethenyl)-
  • Arsine, dichloro(2-chlorovinyl)-
  • Arsonous dichloride, (2-chloroethenyl)-
  • Lewisite
  • As-(2-Chloroethenyl)arsonous dichloride

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