Description

m-Peg7-Tos is a high-purity, heterobifunctional polyethylene glycol (PEG) derivative featuring a tosylate (p-toluenesulfonate) group at one terminus. This compound is a critical intermediate for the synthesis of complex bioconjugates and functionalized materials, enabling precise chemical modifications. It is primarily utilized by researchers and manufacturers in the pharmaceutical, biotechnology, and advanced materials sectors for applications such as drug delivery system development, protein and peptide modification, and surface functionalization.

Application

• Pharmaceutical Linker Chemistry: Acts as a versatile spacer and linker for attaching drug molecules, targeting ligands, or imaging agents to nanoparticles, polymers, or biological carriers.
• PEGylation Reagent: Used to introduce PEG chains onto proteins, peptides, or small molecules to enhance solubility, improve pharmacokinetics, and reduce immunogenicity.
• Polymer & Material Science: Serves as a functional monomer or initiator for creating PEG-based hydrogels, smart polymers, and surface coatings with tailored properties.
• Bioconjugation: Facilitates the site-specific modification of antibodies, enzymes, and other biomolecules for diagnostic and therapeutic applications.
• Cross-linking Agent: Employed in the synthesis of cross-linked networks for controlled release systems and biomaterial scaffolds.
• Research & Development: A valuable tool in academic and industrial R&D for exploring novel drug delivery routes and material functionalities.

Basic Information

Item	Details
Product Name	m-Peg7-Tos
CAS No.	155887-96-0
Molecular Formula	C24H42O10S
Molecular Weight	522.65 g/mol
Synonyms	α-Methyl-ω-(p-toluenesulfonyl)heptaethylene glycol; 2-[2-[2-[2-[2-[2-[2-(4-Methylphenyl)sulfonyloxyethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethanol; mPEG7-OTs; Monomethoxy PEG7 Tosylate; PEG7 Monomethyl Ether Tosylate; Heptaethylene glycol monomethyl ether tosylate; mPEG7-Tosylate; Tos-PEG7-OMe
EINECS	Contact for details

Quality Control

Our m-Peg7-Tos is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and assay, NMR for structural confirmation, and residual solvent analysis. We provide a detailed Certificate of Analysis (COA) with every shipment to ensure traceability and compliance with your research or cGMP-grade requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 2-8°C or as indicated on the label. This material is hygroscopic (moisture-sensitive) and should be handled under anhydrous conditions to maintain stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Assay	≥ 98.0%
Water Content (KF)	≤ 1.0%
Residual Solvents (GC)	Meets ICH guidelines

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