© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Chemical name: 1,4-Dihydroxy-2-Butyne
Synonyms: Butyne-2, 1,4-diol
Chemical formula: C4H6O2
Appearance: Colorless solid or crystalline powder with a faint odor
CAS number: 110-65-6
GHS Classification: Irritant to eyes and respiratory tract
Hazard pictograms: Exclamation mark
Signal word: Warning
Risk: May cause skin and eye irritation. Vapors can add to headaches and respiratory discomfort. Accidental swallowing brings out toxic symptoms and abdominal distress. Handling the powder without skin protection bruises the skin with redness.
Precautionary statements: Keep away from open flames and hot surfaces. Avoid skin and eye contact. Do not breathe dust or vapor.
Main component: 1,4-Dihydroxy-2-Butyne
Purity: Typically above 95% for technical applications
Impurities: Traces of related diols and alkynes possible in commercial lots
Additives: None for standard lab or industrial use
Inhalation: Move affected person to fresh air rapidly. Give oxygen if breathing troubles arise. Seek medical attention if symptoms remain.
Skin contact: Remove contaminated clothing. Flush skin with water and soap for up to 15 minutes. Scars or ongoing pain deserve doctor attention.
Eye contact: Rinse eyes with lots of clean water, keep lids open. Sticky sensation or blurred vision means a trip to the doctor.
Ingestion: Rinse mouth, never force vomiting. Settle person in a calm state and find medical help quickly.
Flammability: May catch fire at high temperatures or near sparks.
Suitable extinguishing media: Choose foam, dry powder, or carbon dioxide for most fires. Avoid spraying water directly.
Special hazards: Fire smoke can carry carbon monoxide and other toxic fragments.
Advice for firefighters: Full protective gear with breathing apparatus makes the job safer. Keep surrounding drums or sacks cool with water if not directly burning.
Personal precautions: Shield skin and eyes. If in doubt, pick chemical splash goggles and gloves, and turn up ventilation.
Environmental precautions: Stop leakage towards drains, soil, and waterways. Collect powder carefully so wind doesn’t spread it farther.
Cleanup methods: Sweep up solid spills, then bag up waste in solid containers. Wash surfaces with water and mild detergent.
Handling: Choose non-sparking tools, keep containers shut tight, and run work with a fume hood or exhaust fan. Protective gloves and goggles cut down risks.
Storage: Store in a cool, dry location, in well-labeled containers. Keep away from acids, strong bases, and sources of ignition. Don’t pile up near food or drink.
Engineering controls: Local exhaust ventilation keeps airborne dust to a minimum. Fume hoods help in weighing and charging tasks.
Personal protection: Put on chemical-resistant gloves and lab coats as a habit. Goggles act as a good shield for eyes. Use a mask if powders are handled for long stints.
Occupational exposure limits: Data on specific workplace limits sits in short supply, though the rules for general irritants usually serve as a base guideline.
Molecular weight: 86.09 g/mol
Boiling point: Around 180°C under standard pressure
Melting point: Near 58°C
Solubility: Dissolves well in water and many organic solvents
Vapor pressure: Low at room temperatures
Odor: Mild, sweet
Color: Solid white or pale, waxy
Chemical stability: Stable if stored cool and dry, sealed well against moisture.
Reactions: Meets trouble with strong oxidizers and strong acids, picking up heat and perhaps gas. Catches fire if heated high enough.
Decomposition products: Burns can kick out carbon monoxide, carbon dioxide, and organic fragments.
Likely routes of exposure: Inhalation, skin, and eye contact
Acute effects: Irritation of skin, eyes, nose, and throat. High doses spark headaches and nausea.
Chronic effects: Repeated exposure may not have been detailed in major studies, but as with many alkynes and diols—long-term contact probably spells continued irritation.
Environmental impact: May hurt aquatic life if tossed out carelessly. No major long-term persistence shown in studies, yet careful use is best.
Mobility: Soluble in water, so quick spreading through soil is possible if not contained.
Bioaccumulation: Not expected to pile up in plants or animals.
Recommendation: Gather waste in sealed drums or containers marked as hazardous for chemical waste firms.
Avoid: Do not flush large amounts into drains or watercourses. Burning creates toxic smoke, only permitted in incinerators with scrubbers.
Regulatory notes: Local rules on hazardous waste apply; check with city or regional authorities before final disposal.
UN Identification: Classified based on its flammable and irritant properties under international guidelines.
Proper shipping: Use sturdy, leakproof packaging, label clearly, and never store near oxidizers or acids.
Transport category: Moderate hazard materials class—ensure all handlers have chemical awareness training.
Global regulations: Sits under national and regional chemical control acts for laboratory and industrial compounds. Safety training and documented risk assessments feature in all larger workplaces.
Worker protection: Occupational exposure standards and health surveillance checklists are usually referenced. Hazard communication regulations require up-to-date labeling and easy access to handling instructions.
