Tetrachloromethane

Tetrachloromethane is a chlorinated organic solvent with the chemical formula CCl4, also known as carbon tetrachloride. This colorless liquid has a molecular weight of 153.8 g/mol and belongs to the halogenated hydrocarbon family. It is classified as a hazardous substance with multiple health and environmental risks, including carcinogenic properties and ozone depletion potential. Due to its toxicity profile, its use is heavily regulated in most industrial applications.

Tetrachloromethane is a dense, colorless liquid with a characteristic sweet odor reminiscent of chloroform. It has a high density of approximately 1.59 g/cm³, making it significantly heavier than water. The compound is practically insoluble in water but miscible with most organic solvents. It has a boiling point of 76.7°C and a melting point of -22.9°C, making it liquid at room temperature under normal atmospheric conditions.

Tetrachloromethane is primarily used as a chemical intermediate in the production of refrigerants and propellants, particularly in the synthesis of chlorofluorocarbons. It serves as a solvent in certain specialized industrial processes and laboratory applications. Historically used in dry cleaning and fire extinguishers, these applications have been largely phased out due to health and environmental concerns. Current uses are strictly regulated and limited to essential industrial processes where safer alternatives are not available.

Tetrachloromethane requires strict safety protocols due to its acute toxicity and carcinogenic properties. Personnel must wear appropriate PPE including chemical-resistant gloves, safety goggles, and respiratory protection when handling this substance. Work should be conducted in well-ventilated areas or under fume hoods to prevent inhalation exposure. Skin and eye contact must be avoided at all costs. Regular health monitoring of exposed workers is recommended due to the substance's target organ toxicity.

Tetrachloromethane must be stored in tightly sealed containers made of compatible materials, away from heat sources and direct sunlight. Storage areas should be cool, dry, and well-ventilated with appropriate containment systems for spill control. The substance should be kept away from metals, particularly aluminum and zinc, as well as strong bases and oxidizing agents. Secondary containment is recommended, and storage areas must comply with local regulations for carcinogenic substances.

Immediate action is crucial following tetrachloromethane exposure. For skin contact, remove contaminated clothing and flush the affected area with plenty of water for at least 15 minutes. In case of eye contact, rinse continuously with clean water and seek immediate medical attention. If inhaled, move the person to fresh air immediately and provide respiratory support if necessary. For ingestion, do not induce vomiting and seek emergency medical care immediately. Always contact poison control centers promptly.

Tetrachloromethane disposal must comply with strict hazardous waste regulations due to its classification as a carcinogenic and environmentally harmful substance. The waste should be collected in appropriate containers and disposed of through licensed hazardous waste treatment facilities. Incineration at high temperatures in specialized facilities is typically required. Never dispose of tetrachloromethane down drains or in regular waste streams. Always consult local environmental authorities for specific disposal requirements and approved waste contractors.

Tetrachloromethane is classified under ADR as Class 6.1 (toxic substances), Packing Group II, indicating significant transport hazards. It requires proper UN-approved packaging and labeling with appropriate hazard placards during transportation. Vehicles must carry emergency response information and comply with routing restrictions. Drivers need specialized training for transporting toxic substances. The shipment must be accompanied by proper documentation including safety data sheets and emergency contact information for spill response.

Tetrachloromethane is heavily regulated under multiple European frameworks including REACH, CLP, and the Montreal Protocol due to its ozone-depleting properties. It is classified as a Category 2 carcinogen and requires authorization for most uses under REACH. The substance is subject to strict workplace exposure limits and requires comprehensive risk assessment. Import, export, and use restrictions apply in many jurisdictions. Companies handling this substance must maintain detailed records and implement stringent occupational health measures.

Tetrachloromethane is available through specialized chemical distributors like OYSI, which serves the European market with technical-grade chemicals. Due to its regulated status, purchases typically require proper justification of intended use and compliance with regulatory requirements. Buyers must demonstrate appropriate handling capabilities and waste management procedures. OYSI provides comprehensive documentation including safety data sheets and certificates of analysis to ensure regulatory compliance for professional and industrial customers across Europe.