99.9% Purity Ethylene Glycol

99.9% pure ethylene glycol undergoes multiple purification processes, including distillation and molecular sieve adsorption, to control the moisture content below 0.08% and significantly reduce impurities such as aldehydes, acids, and metal ions. Its color is far lower than that of conventional industrial-grade products. This ultra-low impurity content eliminates the risks of side reactions such as hydrolysis and oxidation. In purity-sensitive processes like polyester synthesis, it effectively avoids color deviations and performance fluctuations caused by trace impurities, providing a fundamental guarantee for the stable production of high-quality downstream products.

High-purity ethylene glycol exhibits outstanding chemical inertness and low volatility. With a boiling point as high as 197.4°C, it maintains constant properties over a wide temperature range and is not easily oxidized or decomposed. This characteristic prevents the formation of acidic corrosion products due to its own deterioration in high-temperature processes or long-term operation scenarios, greatly reducing equipment corrosion and solution acidification problems. It also ensures batch-to-batch consistency of key physical parameters such as refractive index and viscosity, laying a solid foundation for standardized production and quality control.

With its two hydrophilic hydroxyl groups, 99.9% pure ethylene glycol possesses extremely strong solubility for many inorganic salts, as well as organic compounds such as resins and fragrances. It is also miscible with a variety of solvents, including water and acetone. High purity means extremely low reaction interference. When used as a solvent or reactant in fine organic synthesis processes such as esterification and condensation, it ensures that the reaction proceeds strictly along the predetermined pathway, improving product yield and purity. This makes it an ideal medium for efficient extraction and chemical reactions in pharmaceuticals, coatings, and inks.

High-purity ethylene glycol, used as a base for antifreeze, has a freezing point of -13.2°C. When mixed with water in an appropriate proportion, the freezing point can be significantly lowered to -40°C or even lower, while the boiling point increases to above 108°C, providing a wide liquid-phase operating window. In automotive engines and industrial refrigeration and HVAC systems, this characteristic ensures that equipment does not freeze in frigid environments and does not boil under high-temperature, heavy-load conditions, significantly improving the safety and reliability of cooling system operation through efficient heat transfer.

In the production of polyester fibers and bottle-grade polyester resins, 99.9% pure ethylene glycol is the primary raw material choice. This grade of product not only meets purity standards but also possesses excellent ultraviolet transmittance, satisfying the stringent requirements of national standards for polyester at wavelengths of 220nm, 275nm, and 350nm. Extremely low moisture and metal ion content prevents abnormal polymer chain termination and color degradation, ensuring the whiteness of polyester filaments and the clarity of bottle flakes, directly determining the grade and competitiveness of end-use textile and packaging products.