Bis(2-hydroxyethyl) terephthalate

Updated: 2026-09-19

Overview

Bis(2-hydroxyethyl) terephthalate (BHET) is a key intermediate in the production of polyethylene terephthalate (PET), a widely used polymer in packaging, textiles, and engineering plastics. BHET is synthesized through the esterification of terephthalic acid with ethylene glycol, forming a monomer that polymerizes to create PET. Its role as a precursor makes it indispensable in the polyester industry. BHET is favored for its relatively simple synthesis and high reactivity, which facilitate efficient polymerization processes. The compound's stability and solubility in common solvents also contribute to its widespread industrial use. Understanding BHET's properties and handling requirements is essential for manufacturers aiming to optimize PET production.

Physical and Chemical Properties

BHET appears as a white crystalline powder with a melting point between 110-115°C. It is soluble in hot water, methanol, and ethanol, which makes it versatile for various industrial processes. The compound's molecular weight is 254.24 g/mol, and its molecular formula is C12H14O6. Chemically, BHET is stable under normal conditions but can degrade at elevated temperatures or in the presence of strong acids or bases. Its solubility and reactivity are critical for polymerization reactions, where it serves as a building block for PET. Proper handling and storage are necessary to maintain its quality and efficacy in industrial applications.

Main Applications

BHET's primary application is in the production of PET, which is used to make bottles, films, fibers, and other polyester-based products. The compound's ability to polymerize efficiently makes it a cornerstone of the polyester industry. PET derived from BHET is known for its strength, durability, and recyclability. Beyond PET, BHET is also explored in research for developing new polymeric materials with enhanced properties. Its role as an intermediate allows for modifications that can lead to innovations in biodegradable plastics and other advanced materials. The versatility of BHET ensures its continued relevance in both established and emerging markets.

Safety and Storage

BHET should be handled with care to avoid inhalation or skin contact, which can cause irritation. Personal protective equipment, such as gloves and goggles, is recommended when working with the compound. Proper ventilation is also essential to minimize exposure to dust or vapors. Storage conditions for BHET include keeping it in a cool, dry place away from direct sunlight and moisture. Containers should be tightly sealed to prevent contamination and degradation. Following these guidelines ensures the compound remains effective and safe for industrial use.

B2B Procurement Guide

When procuring BHET, buyers should prioritize suppliers with a proven track record of quality and reliability. Verifying the compound's purity and consistency is crucial, as impurities can affect polymerization processes. Bulk purchasing may offer cost advantages, but storage capacity and shelf life should be considered. Negotiating contracts with suppliers that include technical support and after-sales service can be beneficial. Additionally, staying informed about market trends and regulatory changes can help buyers make informed decisions and secure competitive pricing.