Oligoethylene Glycols for Polymer Intermediates | Aure Chemical
Aure Chemical is a China-based specialty chemical supplier offering oligoethylene glycols and hydroxyl-terminated PEG intermediates that function as precise polymer intermediates and specialty chemical building blocks. These short-chain polyether glycols support projects in R&D, polymer synthesis, specialty chemical synthesis, polymer modification, surface modification, and polyether intermediate sourcing.
What Are Oligoethylene Glycols?
Oligoethylene glycols are short-chain polyethylene glycol structures consisting of a defined number of repeating ethylene glycol units terminated by hydroxyl groups at both ends. Unlike high-molecular-weight PEG polymers, which are polydisperse mixtures, oligoethylene glycols are discrete, well-characterized molecules with specific molecular formulas and CAS numbers. They belong to the broader family of hydroxyl-terminated PEG intermediates (HO-PEG-OH) and are commonly referred to as PEG diols or polyether glycols.
The ether oxygen atoms distributed along the chain confer hydrophilicity and flexibility, while the terminal hydroxyl groups provide sites for further chemical modification. Common members of this series include pentaethylene glycol (5 ethylene glycol units), hexaethylene glycol (6 units), heptaethylene glycol (7 units), octaethylene glycol (8 units), nonaethylene glycol (9 units), and decaethylene glycol (10 units). These compounds occupy the space between simple glycols such as diethylene glycol and longer PEG chains, offering a balance of defined structure and useful physical properties for synthetic applications.
Because they possess exact chain lengths and narrow molecular weight distributions, oligoethylene glycols serve as reliable building blocks where reproducibility and precise spacing are required. Their manageable viscosity and good solubility in water and many polar organic solvents further enhance their utility as intermediates in polymer and specialty chemical synthesis.
Why Oligoethylene Glycols Are Used as Polymer Intermediates
Oligoethylene glycols function as versatile polymer building blocks and flexible spacers in a wide range of synthetic applications. Their dual terminal hydroxyl groups enable participation in esterification, etherification, urethane formation, and other coupling reactions, allowing chemists to incorporate hydrophilic, flexible segments into larger molecular architectures.
In polymer synthesis, these compounds act as chain extenders and hydrophilic modifiers. They can be incorporated into polyesters, polyurethanes, and epoxy resins to adjust hydrophilicity, flexibility, and compatibility with aqueous systems. In specialty chemical synthesis, oligoethylene glycols serve as precursors for preparing more complex functional PEG derivatives. Through straightforward transformations, the terminal hydroxyl groups can be converted into halogenated, amino, methoxy, carboxyl, or protected intermediates, expanding the range of available building blocks.
These short-chain PEG diols are also employed as intermediates in the production of surfactants, emulsifiers, and resin components where controlled hydrophile-lipophile balance is important. Their ability to act as surface modification intermediates stems from the capacity to attach PEG segments to substrates or molecules, imparting improved water compatibility or adjusted surface properties in research and industrial formulations.
Because oligoethylene glycols occupy a defined position within the larger PEG & Polyether Derivatives family, they often serve as starting materials or reference compounds when selecting or synthesizing other functional polyether intermediates for advanced applications.
Chain Length and Application Direction
The number of ethylene glycol repeating units directly influences the physical and chemical behavior of oligoethylene glycols. Shorter chains, such as pentaethylene glycol and hexaethylene glycol, provide more compact hydrophilic spacers with lower viscosity and easier handling in many synthesis workflows. As chain length increases to hepta-, octa-, nona-, and decaethylene glycol, hydrophilicity strengthens, flexibility improves, and the ability to act as a longer molecular spacer increases. These longer variants may also show higher viscosity and stronger hydration behavior, which can be useful in polymer modification and formulation work.
Selection of the appropriate chain length therefore depends on the required distance between functional groups, the desired balance between hydrophilicity and lipophilicity, and the handling characteristics needed for the downstream reaction or formulation. Members of this series are commonly selected for their water solubility and compatibility with many polar organic solvents, which helps simplify their use across diverse synthetic routes.
| Product | CAS No. | Approximate Chain Type | Application Direction | Product Page |
|---|---|---|---|---|
| Pentaethylene glycol | 4792-15-8 | 5 ethylene glycol units (C10H22O6) | Compact hydrophilic spacer, short-distance linker, precursor for further functionalization | Pentaethylene glycol CAS 4792-15-8 |
| Hexaethylene glycol | 2615-15-8 | 6 ethylene glycol units (C12H26O7) | Short flexible spacer, balanced hydrophilicity and handling, common building block | Hexaethylene glycol CAS 2615-15-8 |
| Heptaethylene glycol | 5617-32-3 | 7 ethylene glycol units (C14H30O8) | Moderate-length spacer, increased hydrophilicity, polymer modification intermediate | Heptaethylene glycol CAS 5617-32-3 |
| Octaethylene glycol | 5117-19-1 | 8 ethylene glycol units (C16H34O9) | Flexible hydrophilic segment, good balance of properties for synthesis and formulation | Octaethylene glycol CAS 5117-19-1 |
| Nonaethylene glycol | 3386-18-3 | 9 ethylene glycol units (C18H38O10) | Longer spacer, stronger hydration behavior, useful in polymer networks and surface modification | Nonaethylene glycol CAS 3386-18-3 |
| Decaethylene glycol | 5579-66-8 | 10 ethylene glycol units (C20H42O11) | Extended flexible linker, high hydrophilicity, precursor for advanced polyether constructs | Decaethylene glycol CAS 5579-66-8 |
Selected Oligoethylene Glycols from Aure Chemical
Aure Chemical supplies a focused range of oligoethylene glycols suitable for polymer and specialty chemical synthesis. Each product is characterized by its defined chain length and terminal hydroxyl functionality, making them useful choices for reproducible synthetic work.
| Product Name | CAS No. | Functional Type | Typical Use Direction | Product Page |
|---|---|---|---|---|
| Pentaethylene glycol | 4792-15-8 | Hydroxyl-terminated PEG diol | Compact spacer and building block for short hydrophilic segments | Pentaethylene glycol CAS 4792-15-8 |
| Hexaethylene glycol | 2615-15-8 | Hydroxyl-terminated PEG diol | Versatile short-chain intermediate for polymer and specialty synthesis | Hexaethylene glycol CAS 2615-15-8 |
| Heptaethylene glycol | 5617-32-3 | Hydroxyl-terminated PEG diol | Moderate spacer for polymer modification and functional intermediate preparation | Heptaethylene glycol CAS 5617-32-3 |
| Octaethylene glycol | 5117-19-1 | Hydroxyl-terminated PEG diol | Flexible hydrophilic segment for resins, surfactants, and advanced intermediates | Octaethylene glycol CAS 5117-19-1 |
| Nonaethylene glycol | 3386-18-3 | Hydroxyl-terminated PEG diol | Extended spacer for polymer networks and surface modification research | Nonaethylene glycol CAS 3386-18-3 |
| Decaethylene glycol | 5579-66-8 | Hydroxyl-terminated PEG diol | Longer hydrophilic linker and precursor for complex polyether architectures | Decaethylene glycol CAS 5579-66-8 |
How to Select Oligoethylene Glycols for Synthesis Projects
Effective oligoethylene glycol selection begins with defining the required chain length or number of ethylene glycol units. Shorter chains are often preferred when compact spacing or lower viscosity is needed, while longer chains provide greater flexibility and stronger hydrophilic character. The terminal hydroxyl functionality is a key consideration; both ends are reactive, enabling symmetric or sequential modification depending on the synthetic strategy.
PEG diol intermediate sourcing also requires attention to hydrophilicity and solubility requirements in the intended reaction medium or final formulation. Compatibility with downstream reactions, such as esterification, urethane formation, or conversion to other functional PEG derivatives, should be evaluated early. Purity and impurity profile become especially important in sensitive polymer or specialty chemical work where residual water, solvents, or related glycols may affect performance.
Confirmation of the correct CAS number ensures the precise chain length is obtained and avoids confusion with isomeric or related structures. Product specification documents, including target purity, water content, and appearance, help align material quality with project needs. Packaging preferences and shipping conditions should be discussed for moisture-sensitive applications.
Finally, required documentation such as COA, SDS, TDS, and specification sheets should be requested at the inquiry stage. Clear communication of quantity, destination, and end-use application enables suppliers to provide accurate availability and supporting information for polyether intermediate selection projects.
Related PEG & Polyether Derivatives Applications
Oligoethylene glycols serve as foundational hydroxyl PEG intermediates that can be further transformed or used alongside other members of the PEG & Polyether Derivatives family. Many buyers exploring short-chain PEG diols also evaluate functional variants for specific reactivity requirements.
For projects requiring amine functionality for amide coupling or surface attachment, amino PEG derivatives offer complementary options. When a non-reactive methoxy cap is preferred at one terminus, methoxy PEG derivatives provide monofunctional alternatives. Carboxyl-bearing structures are available as carboxyl PEG acid derivatives for ester and amide linker chemistry, while halogenated PEG derivatives enable nucleophilic substitution routes.
These related families, together with the core PEG & Polyether Derivatives Supplier overview, allow technical teams to select or design the most appropriate polyether building blocks for their polymer and specialty chemical synthesis objectives.
Why Source Oligoethylene Glycols from Aure Chemical?
Aure Chemical is a China-based specialty chemical supplier and exporter with experience supporting global buyers in sourcing oligoethylene glycols and related PEG/polyether derivatives. Our team assists procurement and R&D professionals in matching products by exact product name, CAS number, chain length, or intended application direction.
When documentation is available, we can provide COA, SDS, TDS, or specification sheets to support internal quality systems and regulatory requirements. We handle inquiries ranging from research-scale samples to pilot and commercial quantities, taking into account packaging needs and international shipping conditions.
With established export operations in fine chemicals and specialty intermediates, Aure Chemical offers clear communication and practical support for polymer and specialty chemical synthesis projects. Whether your work involves chain extension, hydrophilic modification, or preparation of downstream functional PEG derivatives, we welcome detailed inquiries for oligoethylene glycols and related materials.
How to Send an Inquiry for Oligoethylene Glycols
To receive accurate availability and quotation information for oligoethylene glycols, please include the following details in your inquiry:
Product name, such as hexaethylene glycol, or CAS number
Required purity or specification
Quantity needed, such as sample, pilot, or commercial quantity
Destination country or port
Intended application or end use
Required documents, such as COA, SDS, TDS, or specification sheet
Packaging preference
Shipping method preference
Expected timeline
Our team will review your requirements and respond with current information on availability, documentation, and logistics.
Frequently Asked Questions
What are oligoethylene glycols used for?
Oligoethylene glycols are used as defined, short-chain polymer building blocks and flexible hydrophilic spacers in specialty chemical synthesis and polymer modification. They participate in esterification, urethane formation, and other coupling reactions, and serve as precursors for preparing functional PEG derivatives with amino, carboxyl, halogen, or protected end groups.
Are oligoethylene glycols the same as PEG polymers?
No. Oligoethylene glycols are discrete, short-chain molecules with specific numbers of ethylene glycol units and exact CAS numbers. High-molecular-weight PEG polymers are polydisperse mixtures with broad molecular weight distributions. The oligoethylene glycols discussed here, from pentaethylene glycol through decaethylene glycol, offer precise chain lengths suitable for reproducible synthetic work.
What is the difference between pentaethylene glycol and decaethylene glycol?
Pentaethylene glycol contains five ethylene glycol repeating units and provides a compact hydrophilic spacer with relatively lower viscosity. Decaethylene glycol contains ten units, offering greater flexibility, stronger hydrophilic character, and a longer molecular distance between the terminal hydroxyl groups. Both are hydroxyl-terminated PEG diols, but they differ in chain length, handling characteristics, and spacing behavior.
Can oligoethylene glycols be used to prepare functional PEG derivatives?
Yes. The terminal hydroxyl groups of oligoethylene glycols can be chemically transformed into other functional groups. Common conversions include halogenation, amination, methylation to methoxy derivatives, oxidation or carboxylation to acid derivatives, and protection with benzyl or phenyl groups. These transformations expand the utility of the base diol structures within the broader PEG derivative family.
Can Aure Chemical provide COA and SDS for oligoethylene glycols?
When available, Aure Chemical can supply COA, SDS, TDS, and specification sheets for the oligoethylene glycols we source. Please indicate your documentation requirements when submitting an inquiry so we can confirm availability and provide the appropriate files.
Can Aure Chemical help source oligoethylene glycols by CAS number?
Yes. Many customers prefer to inquire using specific CAS numbers to ensure they receive the exact chain length required. Provide the CAS number along with quantity, purity needs, destination, and application details, and our team will check matching specifications and availability.
What information is needed for an oligoethylene glycol quotation?
Quotations are influenced by product identity, quantity, purity requirements, packaging, destination, shipping method, and documentation needs. Clear communication of these details, together with the intended end use, enables us to provide accurate pricing guidance and realistic lead time information for your project.