Prop-1-yne
C3H4
prop-1-yne
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Identification
- CAS Number
- 74-99-7
- EC Number
- 200-828-4
- UN Number
- 3161
- PubChem CID
- 6335
Physical-chemical properties
- Molecular Formula
- C3H4
- Molar Mass
- 40.06 g/mol
- IUPAC Name
- prop-1-yne
Chemical Identifiers
- InChI
- InChI=1S/C3H4/c1-3-2/h1H,2H3
- InChI Key
- MWWATHDPGQKSAR-UHFFFAOYSA-N
Overview
Prop-1-yne (CAS 74-99-7) is a terminal alkyne hydrocarbon with a triple bond between the first and second carbon atoms. This three-carbon acetylenic compound, also known by its IUPAC designation prop-1-yne, represents one of the simplest terminal alkynes in organic chemistry. With the molecular formula C3H4 and a molecular mass of 40.06 g/mol, this gaseous hydrocarbon exhibits the characteristic reactivity of terminal alkynes due to its acidic hydrogen atom attached to the sp-hybridized carbon. The presence of the carbon-carbon triple bond makes prop-1-yne a valuable synthetic intermediate in various chemical processes. As a Class 2 substance under ADR regulations, prop-1-yne requires appropriate handling protocols for transportation, though it carries no specific GHS pictogrammes or signal words under standard classification systems. The compound's physical properties include high volatility and flammability, necessitating proper storage conditions and safety measures during handling. Like other small gaseous molecules such as nitrous oxide, prop-1-yne must be managed with appropriate pressure vessel systems and ventilation controls. In industrial applications, prop-1-yne serves primarily as a chemical intermediate in organic synthesis, particularly in the production of specialty chemicals and pharmaceuticals where terminal alkyne functionality is required. The compound finds use in alkylation reactions and as a building block for more complex acetylenic compounds. Additionally, it serves as a precursor in the synthesis of various propargyl derivatives used in agricultural chemicals and polymer additives. OYSI provides prop-1-yne to European industrial customers requiring reliable access to high-quality acetylenic intermediates for their specialized chemical manufacturing processes.
Safety & Classification
No Hazard Classification
This substance is not classified as hazardous according to CLP Regulation (EC) No 1272/2008.
Transport (ADR)
| UN Number | 3161 |
| ADR Class | 2 |
| Packing Group | |
| Tunnel Code | B/D |
| Proper Shipping Name | Methylacetylen, unter Druck verflüssigt |
| Marine Pollutant | No |
Frequently Asked Questions
What is prop-1-yne?
Prop-1-yne is an alkyne hydrocarbon with the molecular formula C3H4 and CAS number 74-99-7. It is the simplest alkyne containing a terminal triple bond, consisting of a three-carbon chain with the triple bond located between the first and second carbon atoms. With a molecular weight of 40.06 g/mol, prop-1-yne is a highly reactive compound due to its triple bond functionality, making it valuable in organic synthesis and chemical manufacturing processes.
What are the physicochemical properties of prop-1-yne?
Prop-1-yne is a colorless gas at room temperature and atmospheric pressure with a characteristic acetylene-like odor. It has a boiling point of approximately -23°C and is highly flammable. The compound is slightly soluble in water but readily dissolves in organic solvents such as alcohols and ethers. Its triple bond makes it highly reactive toward addition reactions, and it can form explosive mixtures with air under certain conditions.
What is prop-1-yne used for?
Prop-1-yne is primarily used as an intermediate in organic synthesis and chemical manufacturing. It serves as a building block for producing various pharmaceuticals, agrochemicals, and specialty chemicals through addition and substitution reactions. The compound is also utilized in polymer chemistry for creating specialized materials and in research applications. Its reactive triple bond makes it valuable for synthesizing more complex organic molecules in fine chemical production.
How to handle prop-1-yne safely?
Prop-1-yne requires careful handling due to its flammable nature and reactivity. Use appropriate personal protective equipment including safety goggles, flame-resistant clothing, and ensure adequate ventilation in work areas. Eliminate all ignition sources and use explosion-proof equipment when handling. Work in well-ventilated areas or under fume hoods to prevent accumulation of vapors. Ground all equipment to prevent static electricity buildup and have appropriate fire suppression systems readily available.
How to store prop-1-yne correctly?
Prop-1-yne should be stored in properly designed pressure vessels in cool, dry, well-ventilated areas away from heat sources and ignition points. Storage areas must be equipped with appropriate fire detection and suppression systems. Keep containers tightly sealed and protect from physical damage. Store separately from oxidizing agents and other incompatible materials. Ensure storage facilities comply with local regulations for flammable gases and maintain appropriate temperature controls to prevent excessive pressure buildup.
What to do in case of contact with prop-1-yne?
Prop-1-yne exposure requires immediate action depending on the route of contact. For inhalation, move the person to fresh air immediately and seek medical attention if breathing difficulties occur. In case of skin contact, remove contaminated clothing and wash affected areas with soap and water. For eye contact, flush immediately with clean water for at least 15 minutes. If ingestion occurs (unlikely due to its gaseous state), seek immediate medical attention and do not induce vomiting.
How to dispose of prop-1-yne properly?
Prop-1-yne disposal must comply with local and national hazardous waste regulations. The compound should never be released directly into the environment or sewer systems. Unused material should be returned to the supplier when possible or disposed of through licensed hazardous waste contractors. Small quantities may be carefully burned off in a suitable combustion chamber with proper emission controls. Always consult local environmental authorities and follow established waste disposal protocols for flammable gases.
How to transport prop-1-yne?
Prop-1-yne is classified under ADR Class 2 for transport as a flammable gas. Transportation requires specialized pressure vessels designed for gas transport, properly labeled according to ADR regulations. Vehicles must be equipped with appropriate safety equipment and drivers must hold valid certifications for transporting hazardous materials. Ensure compliance with routing restrictions and emergency response procedures. Transport documentation must include proper shipping names, hazard classifications, and emergency contact information.
Is prop-1-yne subject to specific regulations?
Prop-1-yne is subject to various chemical regulations including REACH registration requirements in Europe for commercial use. While not classified as a Substance of Very High Concern (SVHC), it must comply with CLP regulation for classification, labeling, and packaging. Users must follow occupational safety regulations and environmental protection standards. Industrial users should maintain safety data sheets and ensure proper risk assessments are conducted according to local chemical safety legislation.
Where to buy prop-1-yne in Europe?
Prop-1-yne is available through OYSI, a specialized European distributor of technical chemicals. OYSI provides reliable supply chains for industrial and research customers across Europe, ensuring compliance with all relevant regulations and quality standards. As a professional chemical distributor, OYSI offers technical support and proper documentation for prop-1-yne purchases. Contact OYSI directly to discuss availability, specifications, and delivery options for your specific requirements in the European market.
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Data Sources
Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.