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Chemical Name: 1-Butyn-3-ol
Chemical Formula: C4H6O
Synonyms: 3-Butyn-1-ol
Appearance: Colorless to pale yellow liquid
Odor: Slight, alcohol-like
Molecular Weight: 70.09 g/mol
Common Uses: Organic synthesis, specialty chemicals, and pharmaceutical intermediates
Classification: Flammable liquid (Category 3), Eye irritant (Category 2A), Skin irritant (Category 2)
Hazard Statements: May cause skin and eye irritation. Flammable liquid and vapor. Harmful if swallowed or inhaled.
Symbol: Flame, exclamation mark (GHS)
Pictogram: Standard flammable and irritant icons
Primary Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Component: 1-Butyn-3-ol
Concentration: Over 98% (typical for laboratory or industrial supply)
Impurities: Trace amounts of other butynols or water possible
Inhalation: Move to fresh air quickly, provide oxygen if breathing is difficult, seek immediate medical attention if symptoms persist.
Skin Contact: Remove contaminated clothing, wash affected area under running water and mild soap, consult medical care for persistent irritation.
Eye Contact: Rinse slowly with clean water for at least 15 minutes, lifting upper and lower eyelids occasionally; seek prompt medical review, especially if pain or blurred vision develops.
Ingestion: Do not induce vomiting, rinse mouth with water, never give liquids to an unconscious person, seek immediate emergency assistance.
Suitable Extinguishing Media: Dry chemical, foam, carbon dioxide, water spray in small amounts only
Special Hazards: Vapors can form explosive mixtures with air, containers exposed to fire may rupture
Protective Equipment: Self-contained breathing apparatus, full protective gear to avoid vapor and thermal exposure
Firefighting Tips: Cool containers with water from safe distance, keep unnecessary personnel away
Personal Precautions: Use chemical splash goggles, protective gloves, and flame-resistant clothing
Environmental Precautions: Prevent entry into sewage systems and watercourses
Containment: Ventilate area, eliminate all ignition sources, use inert material for absorption, collect and seal waste for proper disposal
Cleaning Up: Wash down spill site with water after visible material is picked up, avoid direct skin contact
Safe Handling: Ground and bond containers during transfer, avoid inhalation, use with local exhaust ventilation where available
Storage Conditions: Store in tightly capped containers, away from heat, sparks, open flames, and direct sunlight
Incompatible Materials: Strong oxidizers, acids, alkalis, ignition sources
General Hygiene: Do not eat, drink, or smoke near the substance; wash hands after handling
Engineering Controls: Use chemical fume hood, maintain adequate ventilation in work areas
Respiratory Protection: Organic vapor respirator or supplied air respirator if ventilation can't control vapor
Eye Protection: Chemical splash goggles
Skin Protection: Nitrile or neoprene gloves, lab coat or apron
Workplace Monitoring: Regular air quality checks, routine personal exposure surveillance
Physical State: Liquid
Color: Near colorless to pale yellow
Odor: Mild alcohol-like scent
Boiling Point: Around 120–122°C
Melting Point: Approximately –73°C
Flash Point: Close to 32°C (closed cup)
Solubility: Miscible with water and most organic solvents
Vapor Pressure: Moderate at room temperature
Vapor Density: Heavier than air
Autoignition Temperature: Unstable if temperature rises sharply
Stability: Stable under recommended storage conditions
Reactivity: Forms explosive mixtures with air, reacts with strong oxidizing agents
Hazardous Reactions: May polymerize or decompose at elevated temperatures
Decomposition Products: Carbon monoxide, carbon dioxide, other toxic vapors if heated or burned
Acute Effects: Can irritate skin, eyes, and respiratory tract; possible central nervous system depression if inhaled at high vapor concentrations
Chronic Effects: Prolonged or repeated exposure may cause dermatitis or more pronounced respiratory effects
Sensitization: Not commonly a skin or respiratory sensitizer
Symptoms of Exposure: Dizziness, headache, nausea, skin redness, eye discomfort
LD50 Oral (rat): Data not widely published for this exact compound; similar alcohols range from moderate to low toxicity
Aquatic Toxicity: Harmful to aquatic organisms if released in significant quantities, especially in confined bodies of water
Persistence and Degradability: Likely breaks down in air and water under ordinary environmental conditions
Bioaccumulative Potential: Not expected to accumulate in animal tissues
Soil Mobility: Highly mobile in soils with potential for leaching
Environmental Impact: Proper containment is key near waterways and groundwater due to fire and health risks
Disposal Methods: Send waste to licensed hazardous chemical disposal site, follow chemical incineration protocols if permitted by regulation
Container Disposal: Triple rinse and puncture before recycling or treating as chemical waste
Preventive Steps: Never dispose to surface water drains or natural environments
Regulatory Guidance: Compliance with local, state, and national chemical waste laws
UN Number: 1987 (Alcohols, n.o.s.)
Shipping Class: Flammable liquid
Packing Group: Class III
Label: Flammable
Precautions in Transit: Keep away from heat, flame, and oxidizers; proper container labeling and secure stowage a must
Environmental Hazard Transport: Spill containment kits and emergency instructions required on board
Workplace Safety: Listed in chemical inventories such as TSCA and REACH
Exposure Limits: Consult workplace regulations for analogous alcohols if specific limits are missing
Environmental Restrictions: Obligations under hazardous air pollutant laws and wastewater disposal standards
Right-to-Know Compliance: Subject to local hazard communication requirements to ensure all who handle it understand the risks
Community Safety: Emergency planning and response duties for users storing significant volumes
