O-Methyl-undecaethylene glycol
O-Methyl-undecaethylene glycol (CAS: 114740-40-8; Formula: HO(CH2CH2O)11CH3; MW: 516.62) is a polyethylene glycol derivative with a terminal methoxy group and a hydroxyl group. This high oligomer purity PEG is utilized in chemical biology and chemical synthesis. Its specific structure makes it suitable for applications requiring controlled chain lengths and defined end-group functionality, often employed in PEGylation processes.
- IUPAC
- Methoxyundecaethylene glycol,Monomethoxy-PEG (n=11)
- Synonyms
- Monomethoxy-PEG (n=11)Methoxyundecaethylene glycol

Chemical Biology Research
O-Methyl-undecaethylene glycol serves as a valuable reagent in chemical biology for developing probes, modifying biomolecules, or creating specific microenvironments. Its defined molecular structure aids in understanding biological interactions and processes.
Chemical Synthesis
In chemical synthesis, this compound can be used as a building block or a functionalising agent. It allows for the introduction of a hydrophilic polyethylene glycol chain with a defined length and a reactive hydroxyl end-group.
PEGylation Applications
This monodisperse PEG derivative is suitable for PEGylation strategies, where it can be attached to proteins, peptides, or small molecules to improve their pharmacokinetic properties, reduce immunogenicity, or enhance solubility.
Oligomer Purity Applications
The high oligomer purity of O-Methyl-undecaethylene glycol makes it suitable for applications where precise molecular weight and minimal polydispersity are critical for reproducible experimental results or product performance.
| Molecular weight | 516.62 |
|---|---|
| Linear formula | HO(CH2CH2O)11CH3 |
| Assay | ≥95% (oligomer purity) |
| Protective equipment | Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is O-Methyl-undecaethylene glycol used for?
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O-Methyl-undecaethylene glycol is used in chemical biology and chemical synthesis, including PEGylation applications, where a polyethylene glycol chain of defined length with specific end-groups is required.
What are the CAS number and formula for O-Methyl-undecaethylene glycol?
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The CAS number for O-Methyl-undecaethylene glycol is 114740-40-8, and its linear formula is HO(CH2CH2O)11CH3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies O-Methyl-undecaethylene glycol with an assay of ≥95% oligomer purity. We do not represent this product as USP, BP, or EP grade.
What safety precautions should be taken when handling O-Methyl-undecaethylene glycol?
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When handling O-Methyl-undecaethylene glycol, it is essential to wear eyeshields and gloves. Refer to the Safety Data Sheet for comprehensive handling information. The WGK Germany classification is 3.
How is O-Methyl-undecaethylene glycol packed and shipped?
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Tech Serve Solutions packs and exports O-Methyl-undecaethylene glycol according to industry best practices to ensure product integrity and safety during transit. Please contact us for specific shipping details.
How can I request a sample or a quote for O-Methyl-undecaethylene glycol?
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To request a sample or a quote for O-Methyl-undecaethylene glycol, please use the contact form on our website or reach out to our sales team directly.
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