1.2-Butadiene

Updated: 2026-07-20

Overview

1.2-Butadiene is an organic compound belonging to the diene family, characterized by two double bonds in its structure. It is a colorless gas at room temperature and is primarily used in industrial applications. Unlike its more common isomer, 1.3-butadiene, 1.2-butadiene is less prevalent but still plays a role in specialized chemical processes. Its reactivity makes it valuable in polymerization reactions, where it serves as a monomer for producing synthetic rubbers and plastics. The compound is typically synthesized through petroleum refining processes or as a byproduct of ethylene production.

Physical and Chemical Properties

1.2-Butadiene exhibits typical properties of aliphatic dienes, including high flammability and reactivity. Its molecular structure features two double bonds, which contribute to its ability to participate in addition reactions, such as Diels-Alder reactions. The compound has a low boiling point of 10.9°C and a melting point of -136°C, making it gaseous under standard conditions. Its density is approximately 0.650 g/cm³ at 20°C, and it is slightly soluble in water but more soluble in organic solvents like ethanol and acetone. The double bonds in 1.2-butadiene make it susceptible to polymerization, especially when exposed to heat, light, or catalysts.

Main Applications

The primary use of 1.2-butadiene is in the production of polymers and synthetic rubbers. It serves as a monomer in copolymerization reactions, contributing to the elasticity and durability of the resulting materials. These polymers are widely used in automotive tires, footwear, and industrial hoses. Additionally, 1.2-butadiene is employed as a chemical intermediate in the synthesis of other organic compounds, including specialty chemicals and adhesives. Its reactivity allows it to be used in the manufacture of resins and coatings, where it enhances performance characteristics such as flexibility and resistance to wear.

Safety and Storage

Due to its high flammability and potential health hazards, 1.2-butadiene requires careful handling and storage. It should be kept in tightly sealed containers in a cool, well-ventilated area, away from ignition sources and oxidizing agents. Exposure to heat or open flame can lead to explosive combustion. Personal protective equipment (PPE), such as gloves and goggles, should be worn when handling the compound. Inhalation or skin contact can cause irritation or more severe health effects, so proper ventilation and containment measures are essential. Emergency procedures should be in place to address spills or leaks, including the use of appropriate fire suppression methods.

B2B Procurement Guide

When procuring 1.2-butadiene, B2B buyers should prioritize suppliers with a strong track record of safety compliance and reliable logistics. The compound is typically transported in pressurized cylinders or bulk containers, depending on the quantity required. Buyers should verify the purity and quality of the product, as impurities can affect its performance in industrial applications. Pricing varies based on market conditions, with bulk purchases often offering cost advantages. It is advisable to establish long-term contracts with reputable suppliers to ensure consistent supply and favorable terms. Always request Material Safety Data Sheets (MSDS) and ensure proper documentation for regulatory compliance.