BHET Details

Name: Terephthalic Acid Bis(2-Hydroxyethyl) Ester, Bis(2-hydroxyethyl) Terephthalate (BHET)

CAS No.: 959-26-2

Molecular Formula: C₁₂H₁₄O₆

Molecular Weight: 254.24 g/mol

Appearance: White to off-white crystalline powder or granules

Main Application: Monomer or intermediate for polyesters like PET, PBT; key product in PET chemical recycling.

Solubility: Slightly soluble in water, readily soluble in hot ethylene glycol, dimethylformamide, dimethyl sulfoxide, etc.

BHET Usage

Terephthalic Acid Bis(2-Hydroxyethyl) Ester (BHET) is primarily used in:

Polyester Production: As a direct monomer or intermediate for Polyethylene Terephthalate (PET) and Polybutylene Terephthalate (PBT), widely used in:
- Chemical Fiber Industry: Production of polyester staple fibers and filaments for apparel, home textiles, industrial fabrics, etc.
- Plastics Industry: Production of PET plastics for bottle-grade PET (beverage bottles, edible oil bottles), film-grade PET (packaging films, audio tape bases), engineering plastics, etc.
- PBT Engineering Plastics: Used in automotive parts, electronic and electrical components, optical cable sheaths, etc.
PET Chemical Recycling: In the depolymerization process of waste PET, BHET is a major depolymerization product. It can be purified and directly used to synthesize new PET resins, achieving circular utilization of waste resources.
Synthesis of Other Polyester Compounds: As an organic synthesis intermediate for the preparation of other specialty polyesters or polymers.

High Purity: Ensures excellent performance and stability of polymer products.
Good Reactivity: Easily undergoes polycondensation reactions, improving production efficiency.
Essential Monomer: A necessary raw material for producing high-quality PET and PBT.
Chemical Recycling Bridge: In the chemical recycling (e.g., depolymerization) process of PET waste, BHET is a crucial intermediate that can be directly reused for polyester synthesis, enabling resource circularity.
Stable Quality: Stable physicochemical properties, facilitating storage and transportation.

Item	Results
Appearance	White granule
Water	0.4%
Melting Range	111℃
Ash	0.004%
Chrominance	Color L 97.4
	Color b 0.7
Acid	3mg/g
Dimer(HPLC)	1. 1%
Assay(HPLC）	97.0%

Conclusion	The results conforms with Enterprise standards

Packaging Specifications: 25kg/bag (PE inner liner, paper-plastic composite bag or woven bag outer), also customizable according to customer requirements.
Storage Conditions: Store in a cool, dry, and well-ventilated warehouse, sealed tightly. Avoid direct sunlight and moisture. Keep away from fire and heat sources.
Shelf Life: 12-24 months (under proper storage conditions)