Overview
Cyclohexanedimethanol (CHDM) is a diol compound widely used in industrial chemistry. Its structure consists of a cyclohexane ring with two hydroxymethyl groups, providing unique reactivity and stability. CHDM is commercially available in cis- and trans-isomeric forms, each offering distinct properties for polymer synthesis. First developed in the mid-20th century, CHDM has become essential for manufacturing high-performance polyester resins. Its ability to enhance material properties like clarity, flexibility, and heat resistance makes it valuable for advanced material formulations.
Physical and Chemical Properties
CHDM exhibits excellent thermal stability, with a melting point range of 42-44°C and boiling point around 285-290°C. The compound is soluble in common organic solvents and water, facilitating its use in various chemical processes. Its density of 1.04 g/cm³ is typical for cycloaliphatic compounds. The cis- and trans-isomers display different crystallization behaviors and reactivity profiles. The trans-isomer generally offers higher melting points and better crystallinity, while the cis-isomer provides improved solubility in certain applications. Both forms contribute to the material's resistance to UV degradation and hydrolysis.
Main Applications
CHDM's primary use is in polyester resin production, particularly for polyethylene terephthalate (PET) modifications. It improves the thermal and mechanical properties of packaging materials and fibers. The compound is also crucial for manufacturing specialty plastics used in automotive parts and electronic components. In coatings and adhesives, CHDM enhances durability and chemical resistance. Its compatibility with other polyols makes it valuable for polyurethane systems. Additionally, CHDM serves as a precursor for high-performance plasticizers in PVC applications, offering superior low-temperature flexibility.
Safety and Storage
While CHDM is generally considered low in toxicity, proper handling procedures should be followed. Workers should use gloves and eye protection to prevent potential irritation from prolonged exposure. The compound is not classified as flammable but should be stored away from strong oxidizers. Optimal storage conditions include temperature control below 30°C in tightly sealed containers. Bulk storage tanks should be constructed from stainless steel or lined carbon steel to prevent contamination. Shelf life typically exceeds two years when stored properly in dry conditions.
B2B Procurement Guide
When sourcing CHDM, buyers should specify the required isomer ratio as it significantly affects material performance. Technical grade (98%+ purity) is commonly used for polymer applications, while higher purity grades are available for specialty uses. Leading manufacturers are concentrated in Asia, Europe, and North America. Buyers should verify supplier certifications and request material safety data sheets (MSDS). Bulk shipments typically come in 25kg bags or 1,000kg supersacks, with discounts available for container-load quantities. Sample testing is recommended to confirm product specifications before large purchases.
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