Description

o-Methyl-Undecaethylene Glycol is a high-purity, synthetic polyethylene glycol (PEG) derivative with a specific methyl ether termination. This chemical is valued for its precise chain length and terminal methoxy group, which provides enhanced solubility and controlled reactivity compared to standard PEGs. It serves as a critical intermediate and functional additive for advanced material synthesis in the pharmaceutical, biotechnology, and specialty chemical industries, where consistent quality and molecular uniformity are paramount.

Application

• Pharmaceutical Intermediate: Used in the synthesis of prodrugs, PEGylated therapeutics, and drug delivery systems (e.g., liposomes, nanoparticles) to improve solubility, stability, and circulation time.
• Bioconjugation Linker: Acts as a spacer or linker for attaching proteins, peptides, or diagnostic agents, reducing immunogenicity and enhancing bioavailability.
• Polymer Chemistry: Serves as a macroinitiator or monomer for creating block copolymers and functionalized polymers with tailored hydrophilic properties.
• Surface Modification Agent: Applied to modify the surface properties of materials (e.g., nanoparticles, medical devices) to impart stealth characteristics, reduce protein adsorption, and improve biocompatibility.
• Formulation Additive: Employed in cosmetic and personal care formulations as a non-ionic surfactant and humectant to stabilize emulsions and control viscosity.
• Chemical Research & Development: Utilized as a building block in organic synthesis and material science research for developing novel functional materials.

Basic Information

Product Name	o-Methyl-Undecaethylene Glycol
CAS No.	114740-40-8
Molecular Formula	C23H48O12
Molecular Weight	516.62 g/mol
Synonyms	2-Methoxyundecaethylene glycol; Methoxy-PEG11-OH; α-Methyl-ω-hydroxyundeca(oxyethylene); Poly(ethylene glycol) methyl ether (Mn ~550); MPEG 550; 3,6,9,12,15,18,21,24,27,30,33-Undecaoxapentatetracontane-1-ol, 45-methoxy-; PEG-11 Methyl Ether; Undecaethylene glycol monomethyl ether
EINECS	Contact for details

Quality Control

Our o-Methyl-Undecaethylene Glycol is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for demanding applications. Key parameters such as purity, molecular weight distribution, and functional group content are verified. A comprehensive Certificate of Analysis (COA) documenting identity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under an inert atmosphere (e.g., nitrogen) to prevent moisture absorption and potential degradation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Average Molecular Weight (GPC)	500 - 550 g/mol
Polydispersity Index (PDI)	≤ 1.10
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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