1,4-Diiodobutane, a chemical compound with the CAS number 628-21-7 and molecular formula C4H8I2, is recognized for its unique chemical characteristics and broad utility. As a bifunctional alkyl halide, it serves as a pivotal reagent and intermediate in numerous chemical processes. Understanding its properties is fundamental to effectively utilizing it in organic synthesis, polymer modification, and other specialized chemical applications.

Physically, 1,4-Diiodobutane is typically described as a colorless liquid. Its melting point is relatively low, often cited around 6°C, which means it remains in a liquid state under standard laboratory conditions. The boiling point is significantly higher, approximately 246.1°C at atmospheric pressure, indicating a relatively low volatility. Its density is around 2.3 g/cm³, reflecting the presence of heavy iodine atoms. While the provided sources may offer slight variations in these figures, they consistently point towards a compound that is manageable under typical laboratory or industrial settings.

Chemically, the key feature of 1,4-Diiodobutane is the presence of two iodine atoms situated at the terminal positions of a butane chain. Iodine is a good leaving group, making these carbon-iodine bonds susceptible to nucleophilic attack. This reactivity is the basis for its extensive use as an organic synthesis intermediate. For instance, it can readily react with nucleophiles such as amines, thiols, or carbanions to form new carbon-heteroatom or carbon-carbon bonds. This capability is essential for constructing more complex organic molecules, including those used in the pharmaceutical industry and in the synthesis of specialty materials.

Beyond its role in synthesis, 1,4-Diiodobutane also finds application as a crosslinking agent in polymer chemistry. By reacting with appropriate functional groups on polymer chains, it can create linkages that enhance the mechanical strength, thermal stability, and chemical resistance of the resulting polymeric materials. This property is valuable in developing advanced polymers for demanding applications, from coatings to specialized plastics.

When sourcing this chemical, it is important to consult with a reliable 1,4-diiodobutane supplier who can provide accurate specifications and quality assurance. Purity levels, often specified as 97% or higher, are critical for achieving predictable reaction outcomes. Whether you are looking to purchase 1,4-diiodobutane for research or industrial use, understanding its properties will guide its effective application.

In essence, the physical and chemical properties of 1,4-Diiodobutane (CAS 628-21-7) make it an indispensable tool in modern chemistry, facilitating complex syntheses and enhancing material performance.