2-methylbuta-1,3-diene

2-methylbuta-1,3-diene is an organic compound with the molecular formula C5H8 and CAS number 78-79-5. This conjugated diene has a molecular weight of 68.12 g/mol and belongs to the family of unsaturated hydrocarbons. It features two double bonds in conjugation with a methyl substituent, making it highly reactive and useful in polymer chemistry. The compound is classified as extremely flammable and potentially carcinogenic, requiring careful handling in industrial applications.

2-methylbuta-1,3-diene is a volatile liquid at room temperature with characteristic properties typical of conjugated dienes. As a C5H8 hydrocarbon, it exhibits low water solubility but good solubility in organic solvents. The compound is highly flammable due to its unsaturated structure and low flash point. Its conjugated diene system makes it prone to polymerization and oxidation reactions. The substance requires storage under inert atmosphere to prevent unwanted reactions.

2-methylbuta-1,3-diene serves primarily as a monomer in synthetic rubber production and polymer manufacturing. It is extensively used in the production of synthetic elastomers and specialty polymers through polymerization reactions. The compound finds applications in adhesive formulations, sealants, and as an intermediate in organic synthesis. Its conjugated diene structure makes it valuable for Diels-Alder reactions and other chemical transformations in fine chemical manufacturing and research applications.

2-methylbuta-1,3-diene requires strict safety measures due to its extreme flammability and carcinogenic properties. Personnel must wear appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and respiratory protection. Work should be conducted in well-ventilated areas away from ignition sources. Grounding and bonding of equipment is essential to prevent static discharge. Emergency shower and eyewash stations must be readily accessible, and only trained personnel should handle this substance.

2-methylbuta-1,3-diene must be stored in a cool, dry, well-ventilated area away from heat, sparks, and open flames. Storage containers should be made of compatible materials and kept tightly sealed under inert atmosphere to prevent polymerization. The storage area must be equipped with appropriate fire suppression systems and maintained below recommended temperature limits. Incompatible materials such as strong oxidizers, acids, and peroxides must be stored separately to prevent dangerous reactions.

Immediate action is required upon contact with 2-methylbuta-1,3-diene due to its hazardous nature. For skin contact, remove contaminated clothing and flush affected area with plenty of water for at least 15 minutes. In case of eye contact, rinse immediately with water for 15-20 minutes and seek medical attention. If inhaled, move to fresh air immediately and seek medical care. For ingestion, do not induce vomiting and seek immediate medical attention while providing safety data sheet information.

2-methylbuta-1,3-diene disposal must comply with local, national, and international hazardous waste regulations due to its carcinogenic and flammable properties. The substance should never be discharged into drains, water courses, or soil. Disposal must be carried out by licensed hazardous waste contractors through approved methods such as controlled incineration at high temperatures. Empty containers may also require special disposal as hazardous waste. Consult local environmental authorities for specific disposal requirements.

2-methylbuta-1,3-diene is classified as ADR Class 3 (Flammable Liquids), Packing Group I, indicating the highest level of danger for flammable liquids. Transportation requires UN-approved packaging and proper hazard labeling including flammable and health hazard pictograms. Drivers must hold ADR certification for dangerous goods transport. Vehicles must be equipped with appropriate safety equipment and emergency procedures. Shipping documentation must include proper shipping names, hazard classes, and emergency contact information.

2-methylbuta-1,3-diene is subject to extensive regulations under REACH and CLP regulations in Europe due to its carcinogenic and mutagenic properties. The substance requires safety data sheets and hazard classification with appropriate GHS pictograms (GHS02, GHS08). While not currently listed as a Substance of Very High Concern (SVHC), its Carc. 1B and Muta. 2 classifications mandate strict handling protocols. Users must comply with occupational exposure limits and implement risk management measures.

2-methylbuta-1,3-diene is available through OYSI, a specialized European distributor of technical chemicals. OYSI provides this regulated substance to qualified industrial customers with proper safety documentation and regulatory compliance support. Due to the hazardous nature of this compound, purchases require verification of intended use and appropriate handling capabilities. Contact OYSI directly for availability, technical specifications, and regulatory guidance for your specific application requirements in the European market.