Product Description
Dimethyl disulfide (DMDS) is an organic sulfur compound with the molecular formula C₂H₆S₂. It is typically a colorless to pale yellow liquid with a strong, unpleasant sulfur-like odor. It has relatively low water solubility but dissolves readily in many organic solvents. Due to its chemical properties, DMDS is widely used in petroleum refining, chemical manufacturing, and agricultural applications. It serves as a sulfur-containing intermediate in organic synthesis and is also used as a sulfiding agent in petrochemical processes. In addition, it has applications in soil treatment and the production of various sulfur-based chemicals.
Chemical Properties
| Melting point | -85 °C |
| Boiling point | 109 °C(lit.) |
| density | 1.0625 |
| vapor density | 3.24 (vs air) |
| vapor pressure | 22 mm Hg ( 20 °C) |
| refractive index | n20/D 1.525(lit.) |
| FEMA | 3536 | DIMETHYL DISULFIDE |
| Fp | 76 °F |
| storage temp. | Flammables area |
| solubility | 2.7g/l |
| form | Liquid |
| Specific Gravity | 1.0647 (20/4℃) |
| color | Clear yellow |
| Odor | at 0.10 % in propylene glycol. sulfurous vegetable cabbage onion |
| Odor Type | sulfurous |
| Odor Threshold | 0.0022ppm |
| explosive limit | 1.1-16.1%(V) |
| Water Solubility | <0.1 g/100 mL at 20 ºC |
| JECFA Number | 564 |
| BRN | 1730824 |
| Exposure limits | ACGIH: TWA 0.5 ppm (Skin) |
| Dielectric constant | 9.7699999999999996 |
| Stability: | Stable. Incompatible with strong bases, strong oxidizing agents, strong reducing agents. Flammable. |
| InChIKey | WQOXQRCZOLPYPM-UHFFFAOYSA-N |
| LogP | 1.91 at 20℃ |
| CAS DataBase Reference | 624-92-0(CAS DataBase Reference) |
| NIST Chemistry Reference | Disulfide, dimethyl(624-92-0) |
| EPA Substance Registry System | Methyl disulfide (624-92-0) |
Safety Information
| Hazard Codes | F,Xn,N,T+ |
| Risk Statements | 11-20/22-36-51/53-36/37/38-26-22-36/37 |
| Safety Statements | 26-61-45-38-36/37/39-28A-16-60-57-39-29 |
| RIDADR | UN 2381 3/PG 2 |
| WGK Germany | 2 |
| RTECS | JO1927500 |
| Autoignition Temperature | 304 °C |
| TSCA | Yes |
| HazardClass | 3 |
| PackingGroup | II |
| HS Code | 29309070 |
| Hazardous Substances Data | 624-92-0(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 290 - 500 mg/kg |
Product Application
Dimethyl disulfide is widely used as an important chemical intermediate in various industrial applications. It serves as a solvent and raw material in the production of pesticides and other sulfur-containing compounds. It is also added to fuels and lubricants to improve their performance and processing properties. In the petrochemical industry, dimethyl disulfide is commonly employed as a sulfiding agent and coking inhibitor in ethylene cracking furnaces and petroleum refining units. Furthermore, it helps reduce coke formation, maintain equipment efficiency, and improve the stability of industrial operations. Its versatility makes it valuable in chemical manufacturing and petroleum processing.
