GLYCOFUROL CAS 31692-85-0

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GLYCOFUROL, also known tetraglycol or Poly(ethylene glycol) tetrahydrofurfuryl ether, is an important chemical with a variety of properties and applications. CAS No. 31692-85-0, the molecular formula is usually expressed as (C2H4O)nC5H10O2, where n represents the degree of polymerization of the ethylene glycol unit, which may vary depending on the specific product. It is a colorless to pale yellow transparent liquid. It is miscible with ethanol, glycerol, polyethylene glycol 400, 2-propylene glycol, propylene glycol, and water in any proportion, and is miscible with castor oil, but is immiscible with peanut oil, isopropyl ether, and petroleum ether. tetraglycolis easily converted into a gel system with excellent elasticity, so it can be used as a medium for dissolving water-insoluble drugs. Due to its good solubility and miscibility, tetraglycolis widely used as a solvent, especially in the pharmaceutical and cosmetic industries. Although tetraglycolis considered relatively safe, appropriate safety measures must still be followed when using it, such as avoiding inhalation, skin contact, and eye contact. In short, tetraglycolis a chemical substance with unique physical and chemical properties and application value, and has broad application prospects in many fields such as pharmaceuticals and cosmetics.

Tetraethylene glycol, chemical name Tetraethylene glycol, molecular formula C ₈ H ₁₈ O ₅, CAS number 112-60-7, is a colorless to pale yellow transparent liquid with multiple hydroxyl structures. It is chemically stable and soluble in solvents such as water, alcohols, and ethers, but insoluble in benzene, toluene, and fatty hydrocarbons.

Core application: Basic functions of solvents and carriers

 

1. Organic synthetic solvents
It is an important organic synthesis solvent that can provide a stable environment to promote chemical reactions. For example, in palladium catalyzed hydrogenation reactions, it can efficiently dissolve substrates such as trans stilbene as a reaction medium while maintaining catalyst activity, resulting in a significant increase in the yield of the target product 1,2-diphenylethane. In addition, it can also be used as a solvent for products such as nitro spray paint and plasticizers, improving the dispersibility and processing performance of raw materials.

 

2. Heat carrier and heat carrier
Due to its high boiling point (327-330 ℃) and low volatility, it is often used as a heat carrier, suitable for high-temperature reaction systems or industrial scenarios that require stable temperature control. For example, in chemical production, it can be recycled to transfer heat and reduce energy loss; In the laboratory, as a component of oil bath or heating medium, ensure the uniformity of reaction temperature.
3. Gas chromatography stationary phase
Glycofurol has moderate polarity and can be used as a stationary liquid for gas chromatography to separate and analyze polar compounds. Its selective separation ability enables it to be used in fields such as petrochemicals and environmental monitoring for detecting volatile organic compounds (VOCs), alcohols, ethers, and other components, with accurate and reliable analysis results.

Industry application: Deep penetration in multiple fields

 

1. Chemical and Petroleum Industries
Aromatic hydrocarbon extraction solvent: It is the core component of a new type of aromatic hydrocarbon extraction solvent, which achieves separation from non aromatic hydrocarbons by selectively dissolving aromatic hydrocarbons (such as benzene, toluene, xylene). It has high extraction efficiency, low solvent loss, significantly improves the purity of aromatic hydrocarbons, and is widely used for aromatic hydrocarbon recovery in refinery reforming units and ethylene cracking units.
Lubricant and brake oil blending agent: In aviation engine lubricating oil, it can improve the low-temperature fluidity and anti-wear performance of the oil, and extend the service life of the equipment; In brake fluid, as a blending agent, it can increase the boiling point (>230 ℃), prevent air resistance at high temperatures, and ensure the reliability of the braking system.

 

2. Cosmetics and Personal Care
Solvent and humectant: it is a commonly used solvent in cosmetics, which can dissolve essence, pigment and other ingredients, and improve product stability; At the same time, its hydroxyl structure can combine with water molecules to form a moisturizing film to reduce skin water loss, which is commonly used in skin care products such as face cream and lotion.
Softener: In shampoo and conditioner, triethylene glycol can penetrate into the gaps between hair scales, repair damaged structures, and make hair soft and shiny. Its mildness makes it suitable for children and sensitive skin products.

 

3. In the field of medicine and veterinary medicine
Drug carrier: As a liquid carrier medium, it can enhance the stability and solubility of drugs, promote the penetration and absorption of drugs in the skin or mucosa. For example, in topical formulations of isoxazoline, when combined with active ingredients, it can effectively control the invasion of animal parasites and prolong the duration of drug efficacy.
Preparation excipients: In oral preparations, triethylene glycol can be used as a plasticizer or solvent to improve the formability of tablets or capsules and ensure that the drug release rate meets therapeutic needs.

Emerging fields: Technology driven expanded applications

 

1. Environmental Protection and Energy Sector
Dehumidification solvent: can form azeotropes with water and achieve dehydration treatment of gases or liquids through distillation separation. For example, in natural gas purification, it can efficiently remove water from acidic gases such as hydrogen sulfide and carbon dioxide, preventing pipeline corrosion; In the electronics industry, it is used for dehydration of semiconductor cleaning solutions to improve product yield.
Battery electrolyte additive: With the development of lithium-ion batteries towards high energy density, triethylene glycol as an electrolyte additive can improve the stability of the electrode/electrolyte interface, suppress side reactions, and extend the battery cycle life. Its high boiling point characteristics are particularly suitable for battery systems in high-temperature environments.

 

2. Materials Science Field
Polymer modifier: The hydroxyl group of triethylene glycol can react with isocyanates, epoxy resins, etc., introducing flexible segments to improve the toughness, impact resistance, and low-temperature performance of the polymer. For example, in polyurethane elastomers, as a chain extender, it can adjust the balance between hardness and elasticity, meeting the needs of fields such as automobiles and shoe materials.
Nanomaterial dispersant: During the preparation of nanoparticles, triethylene glycol can prevent particle aggregation and improve dispersion uniformity through steric hindrance effect. For example, in the synthesis of quantum dots and metal oxide nanoparticles, they can be used as stabilizers to control particle size distribution and optimize material optical and electrical properties.

 

3. Research and Laboratory Applications
Standard material preparation: Tetraethylene glycol (TEG) has high purity (up to 99%), stable chemical properties, and is often used as a solvent or diluent for preparing standard solutions to ensure the accuracy of analysis results.
Low temperature experimental medium: Its freezing point is low (-10 ℃), which can be used as a coolant in low-temperature biological experiments to protect the activity of biological samples; Meanwhile, its low toxicity makes it suitable for sensitive systems such as cell culture.

GLYCOFUROL, also known as tetrahydrofuran polyglycol ether, is synthesized mainly through the addition reaction of tetrahydrofuran (THF) and ethylene oxide (EO). The specific synthesis process may vary depending on the manufacturer and process conditions, but generally follows the following basic steps:

• Basic synthesis steps

1.Raw material preparation

Prepare high-purity tetrahydrofuran and ethylene oxide as reaction raw materials. These raw materials need to undergo strict purification treatment to ensure the quality and safety of the product.
2.Addition reaction

Under appropriate catalysts and reaction conditions, tetrahydrofuran and ethylene oxide undergo addition reaction. In this process, the oxygen atom of ethylene oxide attacks the carbon atom on the tetrahydrofuran ring to form a new ether bond and gradually grow the polyethylene glycol chain.
3.Reaction control

By controlling the reaction temperature, pressure, catalyst dosage, reaction time and other conditions, the length and distribution of the polyethylene glycol chain can be regulated to obtain products with specific properties.
4.Post-treatment

After the reaction, the product needs to be post-treated, including neutralizing the catalyst, removing unreacted raw materials and by-products, and purifying the product. These steps help improve the purity and stability of the product.
5.Product inspection

Finally, the purified product is inspected for quality, including the determination of indicators such as appearance, density, viscosity, purity, etc., to ensure that the product meets the specified quality standards.

• Precautions

During the synthesis process, the reaction conditions need to be strictly controlled to avoid side reactions and the production of harmful substances.
Since GLYCOFUROL has certain toxicity and irritation, corresponding safety protection measures need to be taken during the synthesis and use process, such as wearing protective glasses, protective clothing and gloves.
Waste raw materials, catalysts and by-products need to be handled in accordance with relevant regulations to avoid harm to the environment and human body.

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