Product Introduction of Sulfur Monochloride

I. Basic Information

• Chinese Name: Sulfur monochloride
• English Name: Sulfur monochloride
• Synonym: Disulfur dichloride
• CAS Number: 10025-67-9
• EINECS Number: 233-036-2
• Molecular Formula: $S_{2}C{l}_2$
• Molecular Weight: 135.04
• Appearance: Light yellow to reddish-yellow oily liquid with a characteristic or pungent odor, strongly fuming in air.
• Density: Approximately 1.640-1.687 g/cm³
• Melting Point: -80°C
• Boiling Point: 135.6-138°C
• Solubility: Miscible with many organic solvents such as benzene, ether, chloroform, and carbon tetrachloride. Insoluble in water and decomposes upon contact with water or alcohols.

II. Chemical Properties

• Stability: Relatively stable at room temperature but decomposes into sulfur and chlorine at elevated temperatures (e.g., decomposes at 100°C and completely decomposes at 300°C).
• Reactivity: Reacts with many organic compounds, such as alcohols, phenols, and amines, as well as with some metals to form corresponding sulfides. It can also be reduced by metals to generate chlorides and sulfides, and saturated with chlorine to form sulfur dichloride.

III. Applications

• Rubber Industry: Used as a rubber foaming agent and low-temperature vulcanizing agent to promote the formation of cross-linked structures between rubber molecules, thereby improving the hardness, wear resistance, and aging resistance of rubber.
• Organic Synthesis: Serves as a chlorinating and sulfiding reagent for introducing sulfur atoms into organic molecules to synthesize sulfur-containing compounds such as thioethers and thiones. It can also undergo addition reactions with olefins and alkynes to form chlorinated hydrocarbons.
• Chemical Analysis: Applied in determining the sulfur content of some organic compounds and analyzing the sulfur content in metals.
• Bactericides and Preservatives: Widely used in the preparation of bactericides and preservatives due to its strong antibacterial properties.
• Petroleum Processing: Can react with sulfur compounds in petroleum to form thioacids that are easy to separate and treat, effectively reducing the sulfur content in petroleum and minimizing environmental pollution.
• Environmental Protection: Used as a water treatment agent to remove organic matter and heavy metal ions from water.

IV. Safety and Protection

• Toxicity: Sulfur monochloride is toxic. Its vapors irritate the eyes and mucous membranes, and its liquid can cause burns upon contact with the skin.
• Protective Measures: Workers should wear protective clothing, gas masks, safety goggles, latex gloves, and other personal protective equipment. Production equipment should be sealed, and the workshop should be well-ventilated.
• Emergency Response: In case of skin or eye contact, rinse immediately with a large amount of water. Seek medical attention promptly for severe cases. In case of fire, use sand or dry powder fire extinguishers; do not use water.

V. Packaging, Storage, and Transportation

• Packaging: Typically stored in carbon steel tanks or glass bottles, which are then packed in wooden cases.
• Storage and Transportation Conditions: Store in a cool, ventilated, and dry warehouse away from heat sources and open flames. Do not store or transport with oxidizers, flammables, food additives, or alkalis. Protect from rain and sunlight during transportation. Handle with care during loading and unloading to prevent package breakage.