Description

Terephthalic Acid Bis(2-Hydroxyethyl) Ester is a high-purity diester derivative of terephthalic acid and ethylene glycol, serving as a critical monomer and intermediate in advanced polymer synthesis. Its bifunctional hydroxyl-terminated structure makes it a versatile building block for creating materials with enhanced thermal stability and mechanical properties. This compound is essential for manufacturers in the polymer, specialty chemical, and coatings industries seeking to develop high-performance, engineered plastics and resins.

Application

• Primary monomer for unsaturated polyester resins (UPR) used in fiberglass-reinforced plastics for automotive parts, marine hulls, and construction panels.
• Key intermediate in the production of polyurethanes (PU), contributing to the formation of elastomers, adhesives, and flexible or rigid foams.
• Building block for specialty copolyesters and engineering plastics that require improved chemical resistance and thermal properties.
• Cross-linking agent and chain extender in coatings, inks, and composite materials to enhance durability and finish.
• Raw material for plasticizers and modifiers aimed at improving the flexibility and processing of PVC and other polymers.
• Intermediate in organic synthesis for pharmaceuticals, agrochemicals, and liquid crystal polymers (LCPs).

Basic Information

Product Name	Terephthalic Acid Bis(2-Hydroxyethyl) Ester
CAS No.	959-26-2
Molecular Formula	C12H14O6
Molecular Weight	254.24 g/mol
Synonyms	Bis(2-hydroxyethyl) terephthalate (BHET); 2,2'-(1,4-Phenylenebis(oxy))bis(ethanol); Ethylene glycol bis(2-hydroxyethyl terephthalate); Terephthalic acid di(2-hydroxyethyl) ester; 1,4-Bis(2-hydroxyethoxycarbonyl)benzene; Di(2-hydroxyethyl) terephthalate; Ethylene glycol terephthalate dimer; TPA-bis-HEC
EINECS	213-513-6

Quality Control

Our Terephthalic Acid Bis(2-Hydroxyethyl) Ester is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (typically 15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.5%
Melting Point	109 - 113 °C
Water Content (KF)	≤ 0.5%
Acid Value	≤ 1.0 mg KOH/g
Hydroxyl Value	420 - 440 mg KOH/g
Heavy Metals (as Pb)	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.