2-Chloroethyl ethyl sulfide
| Half mustard | |
|---|---|
 | |
| Molecular structure via molpic based on CDK |
| Rotamer [] | |
|---|---|
| Conformer structure via 3Dmol.js |
| Physical properties [] | |
|---|---|
| Molecular mass | 124.63 g/mol [1] |
| Density | 1.0663 at 20 °C/4 °C g/cm3 [1] |
| Appearance | Colorless liquid [1] |
| Odor | Mild sulfide [1] |
| Boiling point | 156 °C [1] |
| Decomposition | The mustard /stimulant, 2-chloroethyl ethyl sulfide/ decomposes by a mechanism involving formation of dimeric sulfonium ions which transform slowly to 1,4-dithiane as a primary product. [1] |
| Solubility | Slightly soluble in water [1] |
| Predicted LogP | 1.8 [1] |
| Structural Identifiers [] | |
|---|---|
| Molecular formula | C4H9ClS [1] |
| IUPAC name | 1-chloro-2-ethylsulfanylethane [1] |
| SMILES | CCSCCCl [1] |
| InChI | InChI=1S/C4H9ClS/c1-2-6-4-3-5/h2-4H2,1H3 [1] |
| InChIKey | GBNVXYXIRHSYEG-UHFFFAOYSA-N [1] |
2-Chloroethyl ethyl sulfide (also known as 2-Ethylthioethyl chloride, 1-Chloro-2-(ethylthio)ethane, Ethyl 2-chloroethyl sulfide, 2-(Ethylthio)chloroethane, Sulfide, 2-chloroethyl ethyl, Sulfide, chloroethyl ethyl, Chlordiethylsulfid, 2-Chloroethyl ethyl thioether, h-Mg; half-mustard gas or Chlorothiolalcohol) is a
Chemistry
Stereochemistry []
2-Chloroethyl ethyl sulfide is a achiral mixture.
See also []
External links []
References []
National Center for Biotechnology Information. PubChem Compound Summary for CID 12733, 2-Chloroethyl ethyl sulfide. Accessed August 24, 2026. https://pubchem.ncbi.nlm.nih.gov/compound/12733
U.S. Food and Drug Administration; National Center for Advancing Translational Sciences. 2-Chloroethyl ethyl sulfide. UNII: 5MN267Q6RG. Global Substance Registration System. Accessed August 24, 2026. https://gsrs.ncats.nih.gov/ginas/app/beta/substances/5MN267Q6RG