Description

m-Peg9-Phosphonic Acid is a high-purity, functionalized polyethylene glycol derivative featuring a terminal phosphonic acid group. This compound is engineered to serve as a versatile linker and surface modifier, offering excellent water solubility and reactive sites for conjugation. It is essential for researchers and manufacturers in the pharmaceutical, bioconjugation, and materials science sectors who require precise molecular tools for creating advanced drug delivery systems, diagnostic agents, and functional coatings.

Application

• Bioconjugation & Drug Delivery: Acts as a hydrophilic spacer and linker for attaching targeting ligands, drugs, or imaging agents to nanoparticles, proteins, or other biomolecules.
• Surface Functionalization: Used to modify the surface of inorganic materials (e.g., metal oxides, quantum dots) and polymers to impart hydrophilicity, improve biocompatibility, and enable further chemical grafting.
• Chelation & Metal Binding: The phosphonic acid group provides strong chelating properties for metal ions, useful in catalysis, wastewater treatment, and the preparation of metal-organic frameworks (MOFs).
• Pharmaceutical Intermediates: Serves as a key building block in the synthesis of prodrugs and novel therapeutic agents where a PEGylated phosphonate moiety is required.
• Research & Development: A critical reagent in academic and industrial R&D for exploring new polymer architectures, hydrogel formation, and advanced material properties.

Basic Information

Product Name	m-Peg9-Phosphonic Acid
CAS No.	2055016-25-4
Molecular Formula	C19H41O13P
Molecular Weight	508.49 g/mol
Synonyms	Phosphonic acid, P-[2-[2-[2-[2-[2-[2-[2-[2-(2-methoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethyl-; Methoxy-PEG9-phosphonic acid; mPEG9-phosphonic acid; 2-[2-[2-[2-[2-[2-[2-[2-(2-Methoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethylphosphonic acid; α-Methoxy-ω-phosphonic acid-poly(ethylene glycol); PEGylated phosphonic acid (n=9)
EINECS	Contact for details

Quality Control

Our m-Peg9-Phosphonic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and NMR for structural confirmation, to ensure it meets exacting standards for research and production. Certificates of Analysis (COA) with detailed specifications are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 2-8°C. This material is hygroscopic (moisture-sensitive); ensure the container is sealed under an inert atmosphere after each use to maintain stability and prevent degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Water Content (KF)	≤ 1.0%
Phosphonic Acid Content (Titration)	Contact for details

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