Synergy can Disposal of Bromomethane (CH₃Br)

Overview

  • Chemical Formula: CH₃Br

  • Description: Bromomethane, also known as methyl bromide, is a colourless, odourless gas that is both toxic and ozone-depleting. It is used primarily as a fumigant for soil, buildings, and commodities.

Label Information

  • Contents: The canister contains bromomethane (CH₃Br).

  • UN Number: 1062

    • Purpose of UN Number: The United Nations number 1062 is used to identify bromomethane for transport and emergency response purposes.

  • Hazard Symbols:

    • Toxic Symbol: The label features a toxic hazard symbol (typically a skull and crossbones) indicating that bromomethane is highly poisonous.

    • Ozone Depletion Symbol: Some labels may include an environmental hazard symbol indicating its potential to deplete the ozone layer.

  • Warning Information:

    • Respiratory Protection: The label warns users to employ proper respiratory protection when handling the gas to avoid inhalation.

    • Handling Instructions: Handle the gas with extreme care due to its toxic and ozone-depleting properties. Use in well-ventilated areas or within controlled environments with appropriate safety equipment.

    • Emergency Procedures: The label may include first aid instructions in case of exposure, such as moving the affected individual to fresh air and seeking immediate medical attention.

Physical and Chemical Properties

  • Appearance: Colourless gas.

  • Odour: Odourless (however, an odorant may be added for leak detection).

  • Boiling Point: 3.56°C (38.4°F)

  • Melting Point: -93.66°C (-136.59°F)

  • Density: Heavier than air, with a density of 3.97 g/L at 25°C.

Health Effects

  • Acute Exposure: Inhalation of bromomethane can cause central nervous system depression, headaches, dizziness, nausea, and vomiting. High concentrations can lead to convulsions, respiratory failure, and death.

  • Chronic Exposure: Long-term exposure can cause neurological effects, kidney damage, and liver damage.

  • Skin and Eye Contact: Bromomethane can cause severe irritation and burns upon contact with skin and eyes.

Reactivity and Compatibility

  • Reactivity: Bromomethane is stable under normal conditions but can react with strong oxidisers, alkali metals, and aluminium. It can also react violently with strong bases.

  • Incompatible Materials: Avoid contact with strong bases, oxidising agents, and metals such as aluminium and magnesium.

Environmental Impact:

  • Ozone Depletion: Bromomethane is a potent ozone-depleting substance. Its release into the atmosphere can lead to the depletion of the stratospheric ozone layer, which protects the Earth from harmful ultraviolet (UV) radiation.

  • Toxicity to Wildlife: Bromomethane is toxic to aquatic life and can cause long-term adverse effects in the aquatic environment.

Safety Measures:

  • Storage: Store in a cool, dry, and well-ventilated place away from incompatible substances. Ensure storage areas are equipped with proper ventilation and spill containment systems.

  • Handling: Use appropriate leak detection methods and regularly inspect equipment. Handle with care to prevent leaks and spills. Use in areas with proper ventilation or within fume hoods.

  • Protective Equipment: Use personal protective equipment (PPE) such as respirators, gloves, eye protection, and flame-resistant clothing when handling bromomethane. Ensure that all personnel are trained in handling toxic and ozone-depleting gases and emergency response procedures.

Regulatory Information

  • Occupational Exposure Limits: Various regulatory bodies have established exposure limits for bromomethane. These limits are set to protect workers from the harmful effects of the gas.

  • Transport Regulations: When transporting bromomethane, it must be properly labeled and packaged according to international regulations, such as those set by the International Air Transport Association (IATA) and the International Maritime Organisation (IMO).

  • Phase-Out: Due to its ozone-depleting properties, the use of bromomethane has been phased out in many countries under the Montreal Protocol. Exceptions exist for critical uses where no feasible alternatives are available.