But-2-yne-1,4-diol
C4H6O2
but-2-yne-1,4-diol
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Identification
- CAS Number
- 110-65-6
- EC Number
- 203-788-6
- UN Number
- 2716
- Index Number
- 603-076-00-9
- PubChem CID
- 8066
Physical-chemical properties
- Molecular Formula
- C4H6O2
- Molar Mass
- 86.09 g/mol
- IUPAC Name
- but-2-yne-1,4-diol
Chemical Identifiers
- InChI
- InChI=1S/C4H6O2/c5-3-1-2-4-6/h5-6H,3-4H2
- InChI Key
- DLDJFQGPPSQZKI-UHFFFAOYSA-N
Overview
But-2-yne-1,4-diol (CAS 110-65-6) is an alkyne diol compound with terminal hydroxyl groups and significant industrial utility. But-2-yne-1,4-diol, also known by its IUPAC name but-2-yne-1,4-diol, represents a unique organic compound featuring both alkyne and diol functionalities within its four-carbon structure. This colorless crystalline substance, with the molecular formula C4H6O2 and molecular weight of 86.09 g/mol, serves as an important intermediate in various chemical synthesis processes and industrial applications. The compound's structure contains a central triple bond flanked by two primary alcohol groups, making it highly reactive and versatile in chemical transformations. This dual functionality allows but-2-yne-1,4-diol to participate in both alkyne chemistry and alcohol reactions, positioning it as a valuable building block in organic synthesis. Unlike simpler compounds such as chloromethylbenzene, this diol offers multiple reactive sites for complex molecular construction. Safety considerations are paramount when handling but-2-yne-1,4-diol, as it carries significant hazard classifications including acute toxicity (categories 3 and 4), skin corrosion (1B), skin sensitization (1), and specific target organ toxicity following repeated exposure (category 2). The substance requires careful handling protocols and appropriate personal protective equipment, reflected in its ADR class 6.1 classification and danger signal word designation. Industrial applications for but-2-yne-1,4-diol include its use as an intermediate in pharmaceutical synthesis, polymer production, and specialty chemical manufacturing. The compound serves as a precursor for various downstream products and finds particular utility in the production of surfactants and corrosion inhibitors. OYSI maintains reliable supply chains for but-2-yne-1,4-diol, ensuring consistent availability for European industrial customers requiring this specialized chemical intermediate.
Safety & Classification
Acute Tox. 3 *; Acute Tox. 4 *; Acute Tox. 3 *; STOT RE 2 *; Skin Corr. 1B; Skin Sens. 1
GHS Pictograms
HHazard Statements (H-Statements)
Describe the nature and severity of the hazard
Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).
First Aid Measures
Inhalation
Measures if vapours or dust are inhaled
First Aid Actions
- +P304IF INHALED:
- +P340Remove person to fresh air and keep comfortable for breathing.
- +P311Call a POISON CENTER/doctor.
Related hazard statements:
Skin Contact
Measures if substance contacts the skin
Eye Contact
Measures if substance gets into the eyes
First Aid Actions
- +P305IF IN EYES:
- +P351Rinse cautiously with water for several minutes.
- +P338Remove contact lenses, if present and easy to do. Continue rinsing.
- +P313Get medical advice/attention.
Related hazard statements:
Ingestion
Measures if substance is accidentally swallowed
First Aid Actions
- +P301IF SWALLOWED:
- +P330Rinse mouth.
- +P331Do NOT induce vomiting.
- +P310Immediately call a POISON CENTER/doctor.
Related hazard statements:
General Measures
Emergency 112 | Poison Control: +49 30 19240 (DE), +33 1 45 42 59 59 (FR), +31 30 274 88 88 (NL)
First aid measures are based on CLP classification and associated P-statements. They do not replace the Safety Data Sheet (SDS). In case of emergency, always consult the full SDS and a physician.
Transport (ADR)
| UN Number | 2716 |
| ADR Class | 6.1 |
| Packing Group | III |
| Tunnel Code | E |
| Proper Shipping Name | Butin-1,4-diol, fest |
| Marine Pollutant | No |
Frequently Asked Questions
What is but-2-yne-1,4-diol?
But-2-yne-1,4-diol is an organic chemical compound with the molecular formula C4H6O2 and CAS number 110-65-6. This acetylenic diol features a triple bond between carbon atoms 2 and 3, with hydroxyl groups at both terminal positions. With a molecular weight of 86.09 g/mol, it belongs to the alkyne alcohol family and serves as an important intermediate in organic synthesis and industrial applications.
What are the physicochemical properties of but-2-yne-1,4-diol?
But-2-yne-1,4-diol is typically a white to pale yellow crystalline solid at room temperature with a characteristic odor. The compound is highly soluble in water and polar organic solvents due to its two hydroxyl groups, which enable hydrogen bonding. Its triple bond structure contributes to its reactivity, making it susceptible to various chemical transformations including hydrogenation, oxidation, and polymerization reactions.
What is but-2-yne-1,4-diol used for?
But-2-yne-1,4-diol serves as a valuable intermediate in organic synthesis and industrial manufacturing. It is primarily used in the production of specialty chemicals, pharmaceuticals, and polymer precursors. The compound finds applications in research laboratories for synthetic chemistry, as a building block for complex organic molecules, and in the development of materials with specific properties due to its unique acetylenic structure.
How to handle but-2-yne-1,4-diol safely?
But-2-yne-1,4-diol must be handled with extreme caution due to its corrosive and toxic properties (Danger signal word). Personnel must wear appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing. Work should be conducted in well-ventilated areas or under fume hoods to prevent inhalation. Avoid direct skin and eye contact, and ensure emergency eyewash stations and safety showers are readily accessible.
How to store but-2-yne-1,4-diol correctly?
But-2-yne-1,4-diol should be stored in tightly sealed containers in a cool, dry, well-ventilated area away from heat sources and incompatible materials. Keep containers upright and protected from physical damage. Storage areas must be equipped with appropriate spill containment measures and emergency equipment. Maintain proper inventory rotation and ensure containers are properly labeled with hazard information and safety precautions.
What to do in case of contact with but-2-yne-1,4-diol?
In case of skin contact with but-2-yne-1,4-diol, immediately remove contaminated clothing and flush the affected area with copious amounts of water for at least 15 minutes. For eye contact, rinse immediately with water for 15 minutes while holding eyelids open. If inhaled, move the person to fresh air. Seek immediate medical attention in all cases due to the compound's corrosive and toxic nature. Do not induce vomiting if ingested.
How to dispose of but-2-yne-1,4-diol appropriately?
But-2-yne-1,4-diol waste must be disposed of according to local, national, and international hazardous waste regulations. Contact licensed hazardous waste disposal companies for proper treatment and disposal. Do not discharge into drains, soil, or waterways. Contaminated packaging should be treated as hazardous waste. Maintain proper documentation of waste disposal activities and ensure compliance with environmental protection requirements and chemical waste management protocols.
How to transport but-2-yne-1,4-diol?
But-2-yne-1,4-diol is classified under ADR as Class 6.1 (toxic substances), Packing Group III. Transportation must comply with dangerous goods regulations including proper packaging, labeling, and documentation. Vehicles must carry appropriate safety equipment and emergency response information. Drivers require hazardous materials training and certification. Ensure packages are secured, properly marked with UN identification numbers, and accompanied by transport documents specifying the chemical's hazardous properties.
Is but-2-yne-1,4-diol subject to specific regulations?
But-2-yne-1,4-diol is subject to various chemical regulations including REACH registration requirements in Europe and CLP classification obligations. The compound is classified with multiple hazard classes requiring compliance with occupational safety standards and chemical safety assessments. While not currently listed as a SVHC substance, users must maintain safety data sheets, implement risk management measures, and ensure worker protection according to applicable chemical safety legislation.
Where to buy but-2-yne-1,4-diol in Europe?
But-2-yne-1,4-diol is available through OYSI, a specialized European distributor of technical chemicals. OYSI provides reliable supply chain solutions for industrial and research applications across European markets. As a professional chemical distributor, OYSI ensures proper handling, packaging, and regulatory compliance for hazardous substances. Contact OYSI directly for availability, technical specifications, safety documentation, and delivery options tailored to your specific requirements and location.
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Data Sources
Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.