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Common Name: Potassium tert-Butoxide
Chemical Formula: C4H9KO
Other Names: Potassium 2-methyl-2-propanolate
Appearance: White or off-white powder, sometimes lumpy
Odor: Sharp, strong odor, almost undetectable in small quantities but stings the nose if you get too close
Major Uses: Often shows up in organic synthesis for deprotonation and as a strong base, colleagues use it in making pharmaceuticals, big batches of fine chemicals, and sometimes just to get a tricky reaction across the finish line
Main Dangers: Burns skin, chews through eyes, eats through mucous membranes — it’s a real brute. Catch a whiff and you might start coughing; spill it and you’ll realize that’s only part of the problem. If it gets wet, it might give off butanol vapor, which brings its own fire hazard.
GHS Classification: Flammable solid, serious eye damage, corrosive to metals, serious skin hazard
Label Elements: Signal word “Danger,” skull and crossbones never out of place here; those pictograms jump out for a reason
Hazard Statements: Contact causes severe skin burns and eye damage. It reacts violently with water. Breathing dust or vapor can give you a nasty cough and could seriously injure the lungs.
Precautionary Feedback: Keep away from sources of ignition. Always use personal protective equipment. Don’t store near water or acid.
Primary Ingredient: Potassium tert-Butoxide — nearly pure, rarely mixed
Chemical Identity: CAS 865-47-4
Other Substances: Sometimes trace potassium hydroxide or organic impurities from manufacturing
Inhalation: Get the person into fresh air as quickly as possible; oxygen, deep breathing, and a trip to the doctor if they can’t catch their breath or start coughing up anything odd
Skin Contact: Strip off contaminated clothing without delay and rinse with lots of cool running water; keep at it for 15 minutes or more; stubborn pain means you should seek out a professional
Eye Contact: Flush with gentle running water for plenty of time, making sure to roll the eyes every way; if lenses are present, fish them out and keep rinsing
Ingestion: Do not try to induce vomiting; drink lots of water if conscious and get expert care on the line
Needed Actions: Always reach out to medical professionals, especially for deep burns, persistent pain, trouble breathing, or if any powder may have gotten inside the airway
Suitable Extinguishing Media: Dry powder designed for metal fires, sometimes sand if nothing else is around; regular water only makes things worse
Specific Risks: Burning releases fumes of potassium oxides, butanol, maybe something worse if there’s contamination; pressure can build up fast in closed spaces
Special Equipment: Full gear, with chemical splash suit and independent breathing gear — not many things are worth risking your lungs
Fire Tips: Always keep bystanders back. Aim to confine the fire, don’t rush in or try to douse with water. Move containers out only if it’s safe.
Personal Precautions: Evacuate anyone not directly involved. Gear up with gloves, goggles, splash-protective clothing, some folks go with full face shields
Environmental Steps: Block off drains, make sure no runoff can make it outside the building — it’ll ruin groundwater or hurt aquatic life. Work dry, always avoid water.
Cleanup: Scoop up using only non-sparking tools, transfer to a steel or polyethylene drum, keep sealed and dry till proper disposal. Ventilation is always your friend.
Aftermath: Wash the area down with lots of dry sand if needed, air the place out well. Any contaminated material is hazardous waste and takes special handling.
Handling: Open containers only inside a fume hood or well-ventilated room, far from heat, sparks, or humid air. Always ground containers and wear eye/skin protection. Avoid any and all sources of moisture. Small spills can flare up if ignored.
Storage: Keep sealed tight in original container or approved drum, stored in a dry, cool space away from acids and water lines. Label the drum clearly. Limit access to only those who know their way around reactive chemicals.
Incompatible Materials: Water, acids, halogenated solvents, oxidizing agents — even glassware sometimes cracks with strong bases like this
Engineering Controls: Strong ventilation is critical — local exhausts at the hood, general air flow in the lab or storage. Explosion-proof equipment helps.
Personal Protective Equipment: Chemically resistant gloves (nitrile, butyl rubber), safety goggles, aprons, long sleeves, and sometimes a full-face respirator for big batches or spill handling
Exposure Limits: No set OSHA threshold, but the harshness of the powder and fumes means no one wants to breathe it in for long
Appearance: Dry, flaky white or pale lumps; if it starts to cake or feels damp, things have gone wrong
Odor: Pungent, sharp smell; not much fun to work with
Sensitivity: Moisture and air set it off; keep it dry and out of the humidity
Melting Point: Just above room temperature, starts breaking down fast if heated
Flash Point: Highly flammable as dust or fine solid
Water Reactivity: Explosive in the presence of water; don’t let a single drop anywhere near
Chemical Stability: Stable only in dry, airtight conditions; gets lively if exposed to air or humidity
Hazardous Reactions: Violent reaction with water, giving off heat and flammable butanol vapor; reacts with acids, halogenated compounds, unprotected metals
Hazardous Decomposition Products: Potassium oxides, butanol, and possibly irritating organic vapors
Routes of Exposure: Inhalation, skin, and eyes all at risk
Acute Effects: Corrosive burns on skin and eyes, respiratory irritation, sore throat, coughing — can damage tissue even after brief exposure
Chronic Exposure: Scarring, long-term respiratory or skin trouble if exposed repeatedly
Ingestion Risk: Internal burns, life-threatening if not treated fast
Environmental Impact: Damages aquatic life, can raise pH sharply in ponds and rivers, which wipes out fish and plants
Mobility: Quick to dissolve in water, which makes accidental leaks a big deal
Persistence and Degradation: Likely breaks down to inorganic salts, but not before causing chemical burns to anything living nearby
Waste Management: Don’t dump it down the drain or with regular trash. Hazardous waste contractors will know what to do — most places send it for high-temperature incineration or treat with special neutralizing agents in sealed systems.
Container Disposal: Empty drums need full decontamination before recycling or disposal.
Regulatory Angle: Rules on both national and local level make it a controlled hazardous material.
Recycling: No realistic recycling path, only safe destruction.
UN Number: Listed as a hazardous solid, flammable and reactive
Classification: Flammable solid, Class 4.2, pyrophoric in some situations
Packing Considerations: Use only sealed steel drums with built-in desiccant packs, label everything clearly, keep the paperwork for emergencies
Special Precautions: Protect against moisture at all stages, avoid stacking or jostling during transit
OSHA Status: Covered as a hazardous chemical under federal workplace standards
EPA Requirement: Releases considered reportable; not a compound to casually lose in the environment
Workplace Control: Employers must train workers handling this chemical, keep written records of procedures, and report large-scale use
SDS Mandate: Safety Data Sheets must be close at hand wherever it’s stored or used
Other Guidelines: REACH registration in Europe, full transport labeling globally, clear paperwork for health and fire authorities
