Buta-1,3-diene

Buta-1,3-diene is a highly flammable organic compound with the molecular formula C4H6 and CAS number 106-99-0. It is a conjugated diene hydrocarbon with a molecular weight of 54.09 g/mol. This chemical exists as a pressurized gas under normal conditions and is classified as a Category 1A carcinogen and Category 1B mutagen, making it a substance of significant health concern in industrial applications.

Buta-1,3-diene is a colorless gas at room temperature and atmospheric pressure, typically stored and handled under pressure. It has a mild aromatic odor and is highly volatile due to its low boiling point. The compound is slightly soluble in water but readily soluble in organic solvents. Its conjugated double bond structure makes it highly reactive and prone to polymerization, requiring stabilizers during storage and transport.

Buta-1,3-diene is primarily used as a monomer in the production of synthetic rubber, particularly styrene-butadiene rubber (SBR) and polybutadiene rubber. It serves as a key raw material in the manufacture of automotive tires, footwear, and various rubber products. Additionally, it is used in the production of plastics like ABS (acrylonitrile-butadiene-styrene) and as an intermediate in the synthesis of other chemical compounds in the petrochemical industry.

Buta-1,3-diene requires strict safety measures due to its carcinogenic and mutagenic properties. Personnel must wear appropriate respiratory protection, chemical-resistant gloves, and protective clothing. Work areas must have adequate ventilation and explosion-proof equipment due to its high flammability. All ignition sources must be eliminated, and only trained personnel should handle this substance. Regular air monitoring and health surveillance programs are essential for worker protection.

Buta-1,3-diene must be stored in pressurized containers in cool, well-ventilated areas away from heat sources, sparks, and open flames. Storage areas should be equipped with explosion-proof electrical equipment and adequate fire suppression systems. The substance should be kept away from strong oxidizing agents and incompatible materials. Temperature control is crucial to prevent excessive pressure buildup, and containers should be regularly inspected for leaks or damage.

In case of inhalation exposure to buta-1,3-diene, immediately move the affected person to fresh air and seek medical attention. For skin contact, remove contaminated clothing and wash thoroughly with soap and water. If eye contact occurs, flush immediately with plenty of water for at least 15 minutes. Due to its carcinogenic properties, all exposures should be documented and medical evaluation sought promptly, even for minor contact incidents.

Buta-1,3-diene waste must be disposed of according to local and national hazardous waste regulations due to its carcinogenic classification. The substance should never be released to the environment or disposed of through regular waste streams. Disposal must be carried out by licensed hazardous waste contractors through approved methods such as controlled incineration at high temperatures. All disposal activities must be properly documented and tracked according to regulatory requirements.

Buta-1,3-diene is classified under ADR Class 2 as a flammable gas for transport purposes. It must be shipped in pressure-resistant containers that meet UN specifications and are properly labeled with appropriate hazard placards. Vehicles must be equipped with suitable fire extinguishers and electrical equipment must be explosion-proof. Drivers require specialized training for transporting dangerous goods, and specific routing restrictions may apply in populated areas.

Buta-1,3-diene is subject to strict regulatory oversight under REACH and CLP regulations in Europe due to its carcinogenic and mutagenic properties. It requires authorization for certain uses and is subject to workplace exposure limits and monitoring requirements. Companies must implement risk management measures and provide safety data sheets. The substance may also be subject to import/export controls and requires compliance with occupational health and safety legislation in all jurisdictions.

Buta-1,3-diene is available through specialized chemical distributors like OYSI, which supplies industrial chemicals across Europe. Due to its hazardous nature and regulatory requirements, procurement is typically limited to qualified industrial users with appropriate handling facilities and permits. Suppliers must ensure proper documentation, safety data sheets, and compliance with transportation regulations. Purchase quantities and applications may be subject to regulatory approval and monitoring requirements.