Bromomethane

Bromomethane is an organobromine compound with the molecular formula CH3Br and CAS number 74-83-9. This chemical substance has a molecular weight of 94.94 g/mol and exists as a pressurized gas under normal conditions. Bromomethane is classified as a hazardous substance with multiple danger classifications including acute toxicity, mutagenicity, and potential for causing organ damage. It requires careful handling due to its toxic properties and environmental concerns.

Bromomethane is a colorless gas at room temperature with a sweet, chloroform-like odor. As a pressurized gas (GHS04 pictogram), it has a low boiling point and can easily transition between gas and liquid phases. The compound is slightly soluble in water but readily dissolves in organic solvents. Its molecular structure consists of a methyl group bonded to a bromine atom, making it a simple halomethane with relatively high volatility.

Bromomethane serves primarily as a fumigant and pesticide in agricultural applications, particularly for soil sterilization and pest control in stored products. It is also used as a methylating agent in organic synthesis and as an intermediate in the production of other chemicals. Additionally, bromomethane finds application in pharmaceutical manufacturing and as a solvent in certain industrial processes, though its use has been restricted in many applications due to environmental and health concerns.

Bromomethane requires strict safety measures including respiratory protection, chemical-resistant gloves, and eye protection due to its acute toxicity and skin irritation potential. Work should be conducted in well-ventilated areas or under fume hoods to prevent inhalation. Personnel must be trained in emergency procedures and monitoring equipment should be used to detect gas leaks. Regular health surveillance is recommended for workers exposed to this mutagenic substance with potential for organ damage.

Bromomethane must be stored in pressurized containers designed for gas storage, away from heat sources and ignition points. Storage areas should be well-ventilated, cool, and dry to prevent pressure buildup and potential container failure. The substance should be kept away from incompatible materials and stored in compliance with local regulations for hazardous gases. Regular inspection of storage containers and pressure relief systems is essential for safe storage.

Bromomethane exposure requires immediate action: for skin contact, remove contaminated clothing and wash thoroughly with soap and water. In case of eye contact, flush immediately with plenty of water for at least 15 minutes. If inhaled, move the person to fresh air immediately and seek medical attention. For ingestion, do not induce vomiting and seek immediate medical care. Always consult emergency services for significant exposure incidents due to the substance's high toxicity.

Bromomethane disposal must comply with hazardous waste regulations and should never be released into the environment due to its toxic and potentially ozone-depleting properties. The substance must be collected by licensed hazardous waste disposal companies who can handle pressurized gas containers safely. Incineration at high temperatures in specialized facilities is typically required. Empty containers should also be treated as hazardous waste and disposed of according to local environmental regulations.

Bromomethane is classified as ADR Class 2 dangerous goods, requiring specialized transport procedures for pressurized gases. Transportation must comply with international dangerous goods regulations, using appropriate packaging, labeling, and documentation. Vehicles must be properly placarded and drivers must hold valid dangerous goods transport certifications. Temperature control and pressure monitoring may be necessary during transport to ensure container integrity and prevent accidental release.

Bromomethane is subject to extensive regulations under REACH, CLP, and various environmental protection laws. It is classified with multiple hazard categories including mutagenicity and acute toxicity, requiring comprehensive safety data sheets and risk assessments. Many countries have restricted or banned its use due to ozone depletion concerns under the Montreal Protocol. Industrial users must comply with emission limits, worker protection standards, and environmental monitoring requirements.

Bromomethane is available through OYSI, a European distributor of technical chemicals specializing in hazardous substances. As a regulated chemical with strict handling requirements, purchase is typically limited to qualified industrial users with proper licensing and safety infrastructure. OYSI provides technical support and regulatory guidance to ensure compliant procurement and use. Contact OYSI directly to discuss availability, regulatory requirements, and technical specifications for your specific application needs.