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Substance Name: Tetrabutylammonium Tetrafluoroborate
Chemical Formula: C16H36BF4N
CAS Number: 429-42-5
Appearance: White to off-white crystalline powder, sometimes with a slight odor. Known to dissolve well in acetonitrile and other polar organic solvents, it stands out in labs that use it for ionic conductivity in electrochemistry setups and as a phase-transfer catalyst.
Classification: This chemical does not light up as a high-priority threat at first glance, but treating it as an irritant is smart. Dust can cause discomfort to eyes, skin, and breathing passages. Extended exposure in a poorly ventilated space may amp up irritation. Repeated direct contact with skin can dry it out or even spark red patches for sensitive folks. The substance isn’t explosive or highly flammable, but adding the usual respect in the lab is never wasted energy.
Component: Tetrabutylammonium Tetrafluoroborate
Concentration: Substance comes near 100% purity in most bottles you see on shelves, sidestepping worries about stabilizers or impurities. It’s a single-ingredient salt—no major hidden components creep in from manufacturing.
Eye Contact: If powder or dust lands in eyes, rinse them gently with running water for several minutes. Any redness or burning—keep flushing and seek a medic.
Skin Contact: Wash area with soap and water if powder or solution spills on skin. Irritation that sticks around after washing signals a trip to the nurse.
Inhalation: Fresh air is the friend here. Sneezing or coughing after breathing dust calls for moving away from the source and breathing easy outside.
Ingestion: Rinsing mouth thoroughly, then consulting a healthcare provider works best. Avoid triggering vomiting unless a professional says so.
Suitable Extinguishing Media: Dry chemical, carbon dioxide, or foam all do the job. Water spray can douse fires in the area, but targeting powder with high-pressure jets might scatter things rather than help.
Specific Hazards: Burning the salt doesn’t bring out flames, but heat might release toxic fumes like nitrogen oxides or boron compounds. Good ventilation or moving hot materials outside makes a difference.
Protective Equipment for Firefighters: Full protective gear, gloves that block chemicals, and self-contained breathing apparatus support safety in thick smoke or vapor.
Personal Precautions: Shut off sources of ignition, grab gloves and goggles. Avoid breathing in dust and keep bystanders clear.
Methods for Cleanup: Sweep or shovel spilled powder into sturdy, labeled containers. Keeping dust down with a gentle mist (not a hose blast) prevents it from becoming airborne. Vacuuming with HEPA filters helps in big spills, but avoid brooms that fling fine particles into the air.
Environmental Precautions: Avoid dumping into drains or streams—fluorinated compounds, even in trace amounts, deserve careful treatment.
Handling: Use with local exhaust or good airflow. Gloves, safety glasses, and long sleeves go a long way. Avoid skin contact and keep containers closed tight except during dispensing.
Storage: Keep dry at room temperature, away from strong acids or bases that could kick off unwanted reactions. Moisture and humidity bring lumps and clumps, so keep containers tightly sealed and protected from water spills.
Engineering Controls: Fume hood or local venting minimizes dust.
Personal Protective Equipment (PPE): Nitrile gloves and chemical splash goggles guard against skin and eye exposure. Lab coats or dedicated clothes stop transfer to skin or regular clothes. Respiratory protection like N95 or P100 masks add a layer of defense in situations with heavy dust or spills.
Hygiene Measures: Washing hands before breaks and after cleanup means fewer skin problems down the line.
Physical State: Crystalline solid
Color: White or off-white
Melting Point: 260–265 °C
Solubility: Highly soluble in polar solvents (acetonitrile, DMF, DMSO), practically insoluble in water.
Odor: Little to none in most lab settings.
Vapor Pressure: Negligible, won’t evaporate into the air easily.
Molecular Weight: 297.29 g/mol
Chemical Stability: Tetrabutylammonium Tetrafluoroborate holds up well under normal lab storage and handling.
Possibility of Hazardous Reactions: Strong acids, oxidizers, or bases break it down and may push out hazardous gases. Heating it to decomposition risks releasing toxic fumes, so don’t heat it without strong ventilation.
Incompatible Materials: Avoid contact with strong oxidizers and acids or bases. Humidity and moisture change its form and may reduce chemical performance.
Hazardous Decomposition Products: Decomposition creates toxic boron and nitrogen compounds at high temperatures.
Likely Exposure Routes: Skin contact, inhalation of dusts, and accidental swallowing after touching mouth or food.
Acute Effects: Eyes respond with irritation and redness, skin with dryness, and the lungs with coughing in dust-heavy air. People prone to skin reactions might notice peeling or cracking with long, unprotected use.
Chronic Effects: No long-term toxicity widely reported for this salt, but like many fluorinated compounds, it pays to minimize chronic exposure by wearing gloves and using extraction fans.
Carcinogenicity, Mutagenicity, Reproductive Toxicity: No compelling evidence points to cancer or birth defect risks in scientific reviews. Still, unknowns often exist, especially if mixed with other reactive chemicals in multi-step reactions.
Ecotoxicity: This compound lands in a gray area for environmental risk. None of the studies shout immediate toxicity to wildlife, but tetrafluoroborate ions and related fluorinated anions tend to stick around in ecosystems and may pose bioaccumulation dangers over time.
Persistence and Degradability: In water, the compound breaks down slowly. Sticking with strict disposal and avoiding drain disposal cuts down on long-term buildup in aquatic zones.
Bioaccumulative Potential: Not much data to say it builds up in major food chains, but even small amounts of fluorinated compounds deserve close tracking.
Waste Treatment: Sending used or leftover material for hazardous chemical waste treatment matches best practice. Pouring any solution containing it down the drain makes future wastewater cleanup tangled and expensive.
Contaminated Packaging: Emptied bottles and gloves should head for a hazardous waste bin, not the regular trash. Marking waste for solvents or high-fluoride content helps disposal workers handle it right.
UN Number and Classification: Usually it ships as a non-hazardous material, but regional transport details may vary depending on package size and concentration. Large shipments benefit from clear documentation to avoid confusion at borders.
Packing Instructions: Leak-proof, sealed containers with proper hazard communication labeling prevent accidents. Keeping outer boxes free of residue makes handling easier for shipping crews.
Labeling Requirements: Local and global regulations (like GHS or OSHA) call for clear hazard pictograms even for mild irritants. Safety training on chemical handling and first aid ought to be up to date for labs stocking this salt.
Reporting: No widespread registration or reporting hurdles for small-scale use, but bulk importers should check for fluorinated chemical tracking in certain countries.
