© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Tetrabromomethane, also called carbon tetrabromide, draws interest in chemistry circles for its unique set of properties. This chemical compound holds the formula CBr4. Four bromine atoms huddle tightly around a single carbon atom, producing a molecule that tips the scales at a molecular weight of about 331.63 g/mol. The arrangement shouts “tetrahedral,” like so many carbon-halide molecules. This specific structure explains much of what makes CBr4 stand out: its solids glisten with a crystalline quality, while its density and stability guide its uses in industry and laboratories.
CBr4 isn’t one to slosh around freely — it takes a solid form at room temperature, presenting itself as colorless to white, with a faintly sweet odor that’s hard to forget once encountered. Held in the hand, the solid feels dense, tipping the density meter at 3.42 g/cm3. That’s heavy for an organic compound, owed to those four bromines. The melting point hovers close to 94.5°C, while the boiling point stretches up to 189°C. Pour some into a closed vessel, and it’ll form a vapor that sits heavy and persistent, since the vapor pressure at room temperature is low. In practice, the substance appears as flakes, pearls, or sometimes a lumpy powder — not much flow, but it can be shaped and packed with care.
One carbon, four bromines, tetrahedral symmetry. Such simple oxygen-free arrangements provide stability, but Tetrabromomethane doesn’t just sit inert. With all positions saturated with hefty bromine atoms, the molecule refuses to dissolve in water but gives in easily to organic solvents like carbon disulfide, chloroform, or benzene. High halogen content guarantees density and a degree of chemical inertia, but under fire or ultraviolet light, the molecule will decompose, producing toxic bromine vapors and, at extremes, carbon monoxide or dioxide. The formula’s simplicity — CBr4 — hides a material that’s both a tool and a hazard.
Producers ship Tetrabromomethane as high-purity solids, mostly as free-flowing powder, compact pearls, or flakes for research and manufacturing. Material leaks or air exposure risk the formation of toxic dust or fumes, so sealed, air-tight packaging stands as the norm. A kilo of this stuff pulls more weight and packs more punch than you might guess, splitting easily into laboratory flasks or bulk chemical tanks. Bulk shipments bear the shipping name “Carbon tetrabromide,” though some industry paperwork uses the abbreviation CBr4. The HS Code most-referenced is 2903.69.90, placing it squarely in the family of halogenated derivatives.
Lab workers learn early to respect Tetrabromomethane’s potential for harm. Breathing in dust can lead to headaches, dizziness, or nausea, since the vapors irritate lungs and mucous membranes. Persistent exposure has the potential to cause liver and kidney damage. The chemical’s heavy molecules slide through the bloodstream with alarming ease, which means gloves, goggles, and fume hoods count for more than just routine safety theater. Direct skin contact causes irritation, and accidental ingestion requires immediate medical attention. Firefighters and first responders need full protective equipment, since burning Tetrabromomethane releases hydrogen bromide and other respiratory hazards, making evacuation and containment essential during emergencies. The environmentally minded should note the material’s persistence—large spills risk local contamination, especially where water sources spread the chemical into broader ecosystems.
Industry leans on Tetrabromomethane for several niche but important applications. Its density and insolubility make it valuable in separating minerals by density — a trick still used in some barite and silver mining operations. In laboratories, CBr4 reacts quietly and predictably as a brominating agent, helping organic chemists transform alkenes and alkynes, or turn alcohols into alkyl bromides. It seldom gets commercial attention, but in some cases, manufacturers use it to make flame retardants or as a component in specialty fire extinguishers. Storage requires care: the solid doesn’t explode easily, but decomposition or mishandling turns it into something far less friendly.
Governments track Tetrabromomethane for good reason. Environmental agencies classify it as hazardous, with restrictions on dumping and strict guidances for workplace exposure. Its resistance to breakdown means CBr4 can linger in soils and groundwater, threatening aquatic life and food chains if released in bulk. Unlike many everyday chemicals, this one travels with paperwork and must meet storage, transport, and disposal regulations at every step. Some international treaties classify it as a persistent organic pollutant, though not on the level of the notorious “dirty dozen.” Responsible use always includes clear labeling and secure storage, and producers who ignore secondary containment court disaster and legal trouble.
Workers and managers should treat Tetrabromomethane with a respect that goes beyond the minimum safety manual. Frequent air monitoring, spill drills, and refreshed training set the baseline for risk reduction. Industries that rely on it for mineral separation or bromination chemistry always have a stake in finding less hazardous alternatives. Labs exploring green chemistry focus on newer reagents and separation agents, though CBr4 remains tough to replace for some transformations. Disposal strategies matter. Rather than dumping waste, incineration in specialized facilities stops persistent chemicals from escaping. On the environmental side, monitoring runoff and groundwater can catch traces before they become community-sized problems. When handled thoughtfully, Tetrabromomethane can meet industry needs yet remain contained, reducing risks to workers and the public.
