Dimethyl disulfide / DMDS CAS624-92-0
specification
|
Item |
Specifications |
|
Appearance |
liquid |
|
Colour |
Light yellowish |
|
Odour |
With the odor of sulfur-containing vegetables, such as onions. |
|
Odor Threshold |
0.0022ppm |
|
explosive limit |
1.1-16.1%(V) |
|
Water solubility |
<0.1 g/100 mL at 20 ºC |
|
Exposure limit |
ACGIH: TWA 0.5 ppm (Skin) |
|
Dielectric constant |
9.7699999999999996 |
|
Melting Point |
-98 |
|
Boiling Point |
110 |
|
Vapor Pressure |
29 (25 C) |
|
Density |
0.8483g/cm3 (20 C) |
|
Partition Coefficient |
1.77 |
|
Heat Of Vaporization |
38.4 kJ/mol |
|
Saturation Concentration |
37600 ppm (3.8%) at 25 C (calc.) |
|
Refractive Index |
1.5248 (20 C) |
Usage
Dimethyl Disulfide (DMDS) is a chemical compound with the formula C2H6S2. It is a colorless liquid with a strong, unpleasant odor. Here are some of its main uses:
1. In the petroleum industry: DMDS is widely used as a sulfur - containing additive in petroleum refining. It helps to improve the efficiency of desulfurization processes by acting as a sulfur source. It can react with metal oxides on the surface of desulfurization catalysts, enhancing their activity and stability, and thus improving the removal rate of sulfur - containing compounds in petroleum products.
2. In the chemical industry: It is an important raw material for the synthesis of various organic sulfur - containing compounds. For example, it can be used to prepare methanethiol, which is further used in the production of pesticides, pharmaceuticals, and other fine chemicals. DMDS can also be used in the synthesis of some sulfur - containing heterocyclic compounds, which have important applications in the field of organic synthesis.
3. As a fumigant: Due to its toxicity to insects and microorganisms, DMDS can be used as a fumigant to control pests and fungi in stored grains, warehouses, and greenhouses. It can effectively kill a variety of pests and fungi, helping to protect stored agricultural products and prevent the spread of diseases.
4. In the field of electronics: DMDS is used in the semiconductor industry for certain processes such as chemical vapor deposition (CVD). It can be used to deposit sulfur - containing thin films, which have applications in the fabrication of electronic devices such as transistors and sensors.
5. In analytical chemistry: DMDS can be used as a derivatization reagent in analytical chemistry. It can react with some functional groups in organic compounds to form derivatives with better chromatographic or spectroscopic properties, facilitating the separation and detection of these compounds. For example, it can be used in the analysis of fatty acids and other organic compounds by gas chromatography - mass spectrometry (GC - MS).
Keep and storage
Shelf life:24 month from date of manufacture in original unopened packaging stored in a cool dry place out of direct sunlight, water.
Ventilated warehouse, Low temperature drying, Separated from oxidants, acids.
