2-chlorobuta-1,3-diene

2-chlorobuta-1,3-diene is a synthetic organochlorine compound with the molecular formula C4H5Cl and CAS number 126-99-8. This chemical belongs to the diene family and features a chlorine atom attached to a conjugated butadiene backbone. With a molecular weight of 88.53 g/mol, it is classified as a highly hazardous substance due to its carcinogenic properties (Category 1B) and multiple health risks. It requires careful handling under strict safety protocols in industrial applications.

2-chlorobuta-1,3-diene is typically a colorless to pale yellow liquid at room temperature with a characteristic pungent odor. As a conjugated diene compound, it exhibits high reactivity and volatility. The substance has a relatively low molecular weight of 88.53 g/mol and is classified as a flammable liquid (Category 2). Its conjugated double bond system makes it highly reactive toward polymerization and addition reactions, requiring stabilizers during storage and handling.

2-chlorobuta-1,3-diene is primarily used as an intermediate in chemical synthesis and polymer production. It serves as a building block for manufacturing specialty rubber compounds, synthetic elastomers, and various chlorinated organic chemicals. The compound is utilized in research applications for developing new materials and in the pharmaceutical industry for synthesizing complex organic molecules. Its reactive diene structure makes it valuable for Diels-Alder reactions and other cycloaddition processes.

2-chlorobuta-1,3-diene requires extreme caution due to its carcinogenic and toxic properties. Personnel must wear full chemical-resistant clothing, nitrile gloves, safety goggles, and respiratory protection when handling. Work should be conducted in well-ventilated areas or fume hoods to prevent inhalation exposure. Avoid skin contact and ingestion completely. Use explosion-proof equipment due to its flammable nature, and ensure emergency shower and eyewash stations are readily accessible.

2-chlorobuta-1,3-diene must be stored in tightly sealed containers in a cool, dry, well-ventilated area away from heat sources and ignition points. Keep containers in secondary containment and separate from oxidizing agents, strong acids, and bases. Storage temperatures should be maintained below 25°C to prevent degradation and polymerization. Use appropriate stabilizers to prevent spontaneous polymerization, and implement strict inventory rotation. Store in explosion-proof areas with appropriate fire suppression systems.

Immediate action is critical for any contact with 2-chlorobuta-1,3-diene. For skin contact, remove contaminated clothing and flush affected area with copious amounts of water for at least 15 minutes. If inhaled, move to fresh air immediately and seek medical attention. For eye contact, rinse thoroughly with water for at least 15 minutes while holding eyelids open. Never induce vomiting if ingested. Seek immediate medical attention in all cases and provide safety data sheet to medical personnel.

2-chlorobuta-1,3-diene must be disposed of as hazardous waste through licensed waste management companies specializing in halogenated organic compounds. Never dispose of in regular trash, sewers, or waterways due to its carcinogenic and environmental hazard properties. Incineration at high temperatures (>1000°C) with appropriate scrubbing systems is the preferred disposal method. All disposal activities must comply with local, national, and EU waste regulations. Maintain detailed disposal records for regulatory compliance.

2-chlorobuta-1,3-diene is classified as ADR Class 3 (flammable liquids), Packing Group I, indicating high danger level during transport. Shipments require specialized hazardous goods packaging, proper labeling with GHS02, GHS07, and GHS08 pictograms, and documentation including transport emergency cards. Only certified carriers experienced in hazardous chemical transport should handle shipments. Vehicles must be equipped with appropriate fire suppression systems and emergency response equipment. Temperature-controlled transport may be necessary to prevent degradation.

2-chlorobuta-1,3-diene is subject to extensive regulatory oversight under REACH, CLP, and various national chemical safety regulations. As a Category 1B carcinogen, it requires authorization for many uses and is subject to strict exposure limits and reporting requirements. Companies must maintain detailed safety data sheets, conduct regular risk assessments, and implement comprehensive worker protection programs. Import/export may require special permits, and use restrictions apply in consumer products.

2-chlorobuta-1,3-diene is available through specialized chemical distributors in Europe, including OYSI, which serves as a reliable supplier of technical chemicals across European markets. Due to its hazardous classification and regulatory requirements, purchases typically require proof of legitimate industrial use, appropriate handling facilities, and compliance documentation. OYSI can provide technical support, safety documentation, and regulatory guidance to ensure compliant procurement and use of this specialized chemical compound.