2,3,4-trichlorobut-1-ene
C4H5Cl3
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Identification
- CAS Number
- 2431-50-7
- EC Number
- 219-397-9
- UN Number
- 2322
- Index Number
- 602-076-00-6
- PubChem CID
- 17073
Physical-chemical properties
- Molecular Formula
- C4H5Cl3
- Molar Mass
- 159.44 g/mol
- IUPAC Name
- 2,3,4-trichlorobut-1-ene
Chemical Identifiers
- InChI
- InChI=1S/C4H5Cl3/c1-3(6)4(7)2-5/h4H,1-2H2
- InChI Key
- WZUZDBPJFHQVJC-UHFFFAOYSA-N
Overview
2,3,4-trichlorobut-1-ene (CAS 2431-50-7) is a chlorinated alkene compound with significant industrial applications and notable safety considerations. This halogenated organic compound, with the molecular formula C4H5Cl3 and a molecular weight of 159.44 g/mol, belongs to the family of chlorinated butenes that serve important roles in chemical synthesis and industrial processes. The EC number 219-397-9 identifies this substance within European chemical regulations, where it is classified under multiple hazard categories requiring careful handling protocols. The compound exhibits considerable toxicological properties, classified as a Category 2 carcinogen with acute toxicity ratings that demand professional expertise in handling and application. Its classification under GHS pictograms GHS08 (health hazard), GHS06 (toxic), and GHS09 (environmental hazard) reflects the comprehensive safety measures required during transport, storage, and use. The ADR Class 6.1 designation further emphasizes its toxic nature for transportation purposes. From a safety perspective, 2,3,4-trichlorobut-1-ene presents risks including skin and eye irritation, specific target organ toxicity, and acute aquatic toxicity. These characteristics place it alongside other carefully regulated industrial chemicals such as N-methylaniline, which shares similar toxicity profiles in industrial applications. Primary industrial applications include its use as a chemical intermediate in organic synthesis, particularly in the production of specialized polymers and as a building block for more complex chlorinated compounds. The compound also finds application in certain pharmaceutical intermediates and specialty chemical manufacturing processes. OYSI maintains availability of 2,3,4-trichlorobut-1-ene for qualified industrial customers with appropriate handling capabilities and regulatory compliance frameworks.
Safety & Classification
Carc. 2; Acute Tox. 3 *; Acute Tox. 4 *; STOT SE 3; Skin Irrit. 2; Eye Irrit. 2; Aquatic Acute 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
Skin Contact
Measures if substance contacts the skin
First Aid Actions
- +P302IF ON SKIN:
- +P352Wash with plenty of water.
- +P361Take off immediately all contaminated clothing.
- +P313Get medical advice/attention.
Related hazard statements:
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 | 2322 |
| ADR Class | 6.1 |
| Packing Group | II |
| Tunnel Code | D/E |
| Proper Shipping Name | Trichlorbuten |
| Marine Pollutant | No |
Frequently Asked Questions
What is 2,3,4-trichlorobut-1-ene?
2,3,4-trichlorobut-1-ene is an organochlorine compound with the molecular formula C4H5Cl3 and CAS number 2431-50-7. This chemical features a four-carbon chain with an alkene double bond at the first position and three chlorine atoms substituted at positions 2, 3, and 4. With a molecular weight of 159.44 g/mol, it belongs to the class of halogenated alkenes and is classified as a hazardous substance requiring careful handling due to its toxicological properties.
What are the physicochemical properties of 2,3,4-trichlorobut-1-ene?
2,3,4-trichlorobut-1-ene is a chlorinated organic liquid at room temperature due to its molecular structure and halogen content. The presence of three chlorine atoms increases its density compared to non-halogenated alkenes and affects its volatility. Like most organochlorine compounds, it likely has limited water solubility but good solubility in organic solvents. The compound's physical properties are influenced by intermolecular forces between the polar C-Cl bonds and the unsaturated carbon chain.
What is 2,3,4-trichlorobut-1-ene used for?
2,3,4-trichlorobut-1-ene serves as a chemical intermediate in organic synthesis and industrial manufacturing processes. Its reactive double bond and chlorine substituents make it valuable for producing other chlorinated compounds, pharmaceuticals, or specialty chemicals. The compound may also function as a building block in polymer chemistry or as a precursor for more complex molecular structures. Its specific applications depend on its reactivity profile and the requirements of downstream chemical processes.
How to handle 2,3,4-trichlorobut-1-ene safely?
2,3,4-trichlorobut-1-ene must be handled with extreme caution due to its Danger signal word and multiple hazard classifications. Essential personal protective equipment includes chemical-resistant gloves, safety goggles, and respiratory protection in well-ventilated areas. Avoid skin and eye contact, inhalation, and ingestion. Work in fume hoods when possible, use appropriate containment measures, and ensure emergency procedures are readily available. Given its acute toxicity and carcinogenic potential, minimize exposure time and maintain strict hygiene protocols.
How to store 2,3,4-trichlorobut-1-ene correctly?
2,3,4-trichlorobut-1-ene must be stored in tightly sealed, compatible containers in a cool, dry, well-ventilated area away from heat sources and ignition points. Keep containers away from incompatible materials such as strong oxidizers, bases, and reactive metals. Storage areas should be equipped with appropriate spill containment measures and emergency equipment. Ensure proper labeling with hazard warnings and maintain inventory records. Regular container inspection is essential to prevent leaks and environmental contamination.
What to do in case of contact with 2,3,4-trichlorobut-1-ene?
Immediate action is critical following contact with 2,3,4-trichlorobut-1-ene. For skin contact, remove contaminated clothing and rinse affected areas with plenty of water for at least 15 minutes. In case of eye contact, flush immediately with water for 15 minutes while holding eyelids open. If inhaled, move to fresh air and seek medical attention if breathing difficulties occur. For ingestion, do not induce vomiting and seek immediate medical care. Always consult a physician and provide the safety data sheet.
How to dispose of 2,3,4-trichlorobut-1-ene properly?
2,3,4-trichlorobut-1-ene disposal must comply with local, national, and European waste regulations due to its hazardous classification. The substance requires treatment as hazardous waste and cannot be disposed of through regular waste streams. Contact licensed hazardous waste disposal companies for proper collection and treatment. Incineration at appropriate temperatures in authorized facilities is typically required. Ensure proper waste classification, documentation, and tracking throughout the disposal process to meet regulatory requirements and environmental protection standards.
How to transport 2,3,4-trichlorobut-1-ene?
2,3,4-trichlorobut-1-ene is classified as ADR Class 6.1 (toxic substances), Packing Group II, requiring specialized transportation procedures. Shipments must use appropriate UN-approved packaging, proper labeling with hazard diamonds, and transport documents. Vehicles must carry emergency equipment and drivers need ADR certification for toxic materials. The compound requires specific handling procedures during loading, transport, and unloading. Compliance with international dangerous goods regulations is mandatory for road, rail, sea, and air transport.
Is 2,3,4-trichlorobut-1-ene subject to specific regulations?
2,3,4-trichlorobut-1-ene falls under European REACH regulation requiring registration for commercial use and CLP regulation for classification and labeling. Its Carc. 2 classification subjects it to specific carcinogen handling requirements under occupational health regulations. While not currently listed as SVHC, its hazard profile means it may face future regulatory restrictions. Companies must maintain safety data sheets, conduct risk assessments, and implement appropriate risk management measures. National chemical safety laws may impose additional requirements for handling and use.
Where to buy 2,3,4-trichlorobut-1-ene in Europe?
2,3,4-trichlorobut-1-ene is available through OYSI, a specialized European distributor of technical chemicals and hazardous substances. OYSI provides professional-grade chemicals with proper documentation, safety data sheets, and regulatory compliance support. As a European supplier, OYSI ensures adherence to REACH requirements and provides technical expertise for safe handling and application guidance. Contact OYSI directly for availability, specifications, and regulatory compliance documentation to meet your specific industrial or research requirements.
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2,3,4-trichlorobut-1-ene is a dangerous good. We support you with labeling, packaging, and transport documentation.
Data Sources
Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.