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Common name: Phosphorus Tribromide
Chemical formula: PBr3
Appearance: Colorless to pale yellow fuming liquid
Odor: Sharp and pungent, has a way of clearing the room as soon as the bottle opens
Uses: Common reagent in organic chemistry, especially for converting alcohols to alkyl bromides
Main dangers: This chemical triggers chemical burns without much warning. It damages skin, eyes, throat, and lungs even if you don’t realize it at first. Gives off hydrogen bromide and other toxic fumes if it touches water or gets heated; nobody wants that in a poorly ventilated area.
Signal word: Danger
GHS pictograms: Corrosive, Acute toxicity, Environmental hazard
Immediate health effects: Corrodes tissue, damages respiratory system, causes severe eye injuries
Long-term effects: Irritation lingers, lungs can take a beating after repeated exposure, not to mention headaches and nosebleeds caused by vapors
Main ingredient: Phosphorus tribromide (Concentration: upwards of 98%)
Significant impurities: Trace levels of hydrogen bromide, phosphorus compounds
CAS number: 7789-60-8
Skin contact: Strip contaminated clothes, rinse skin with lots of water, seek medical help fast
Eye contact: Hold eyelids open, flood with water for at least 15 minutes, get medical attention
Inhalation: Move the person to fresh air, keep them warm and silent, get immediate medical attention
Ingestion: Rinse mouth, never try to trigger vomiting, call toxicology or head straight for the ER
Notes for the doctor: Watch out for fluid in lungs, chemical burns, delayed pulmonary complications
Flash point: Not easily flammable, but heating up invites real disaster by releasing noxious gases
Suitable extinguishing agents: Dry powder, carbon dioxide; never try foam or water due to violent reactions
Hazardous combustion products: Hydrogen bromide vapors, phosphorus oxides
Firefighting advice: Gear up with full protective suits and self-contained breathing apparatus; keep your boots dry, stay far, and contain run-off from fire control to avoid contaminating downspouts
Personal protection: Splash goggles, sturdy gloves, lab coat or coveralls, chemical splash boots
Environmental precautions: Keep the chemical off drains and soil, bund up the area if possible
Cleanup methods: Use dry absorbent, shovel into labeled containers for disposal, ventilate space thoroughly afterwards, avoid exposing the clean-up crew for too long
Emergency measures: Evacuate others if the release is big or if fumes spread beyond the designated area
Handling advice: Work under a chemical fume hood, keep bottles sealed tight, keep your gloves and goggles on the whole time.
Storage recommendations: Store in corrosion-resistant containers with tight seals. Keep it cool, dry, and shielded from moisture. Never shelve near bases, oxidizers, or flammable substances.
Incompatibilities: Water, alcohols, strong bases
Engineering controls: Run reactions behind a good fume hood, install air monitors for hydrogen bromide in industries using bulk amounts
Personal protective equipment: Butyl/neoprene gloves, safety goggles, face shield for large-scale tasks, long-sleeve chemical-resistant lab coats, ideally closed shoes and pants
Workplace exposure limits: Inhalation exposure should stick below levels set by national standards—usually sub-ppm or as low as reasonably possible
Additional tips: Never eat or drink near this stuff; keep emergency showers and eyewash stations accessible
Physical state: Liquid
Color: Ranges colorless to pale yellow
Odor: Strong, irritating—a little goes a long way
Boiling Point: Around 175°C
Melting Point: -41°C
Density: About 2.85 g/cm³
Solubility: Reacts violently with water, so forget dissolving it in plain tap
Chemical stability: Stays stable if dry and sealed; the second it hits moisture, it starts to break down
Reactivity risks: Reacts with water to form hydrogen bromide and phosphorous acid, causing heat and possibly boiling
Dangerous combinations: Avoid mixing with alcohols, amines, bases, water, and oxidizers because new chemicals and heat result quickly
Routes of exposure: Skin contact, inhalation, ingestion
Symptoms of exposure: Burns and blisters, eye damage, severe coughing, choking, hoarseness, chest pain, headache, nausea
Acute effects: Severe irritation and burns, risk of pulmonary edema if inhaled
Chronic effects: Repeat exposure nastily irritates nose, throat, lungs—long term might lead to lung issues, chronic bronchitis, or asthma-like symptoms
Environmental toxicity: Toxic to aquatic life, causes long-lasting side effects in water bodies
Persistence and degradability: Hydrolyzes in water to phosphorus acids and hydrogen bromide; both can stress rivers and streams
Bioaccumulation: Unlikely in higher animals, but local impact from slow releases piles up over time
Waste treatment: Collect and label all waste in sturdy, corrosion-proof containers. Send to hazardous waste specialists—never toss down the drain.
Disposal advice: Use licensed disposal outfits, make sure landfill or incineration facilities can handle this particular danger
Cleanup materials: Gloves, absorbents, mops, and everything else that touches the chemical counts as hazardous waste and needs careful packaging
UN number: 1808
Proper shipping name: Phosphorus tribromide
Transport hazard class: 8 (Corrosive)
Packing group: I (high level of danger)
Special precautions: Bottle up tight, cushion containers, label clearly, only use approved trucks or tankers, keep paperwork handy
OSHA status: Classified as a hazardous chemical
EPA regulation: Shows up on lists for hazardous substances, needs reporting for big spills, never dilute and dispose in general waste streams
Workplace labeling: All containers need hazard labels, Safety Data Sheets must be accessible for everyone in the lab or shop.
Transport labeling: Packages need hazard diamonds and handling instructions in plain view
