Description

Peg5-Acid CAS NO 937188-59-5 is a functionalized polyethylene glycol derivative featuring a terminal carboxylic acid group. This bifunctional structure is critical for creating stable, water-soluble conjugates and linkages in advanced chemical synthesis. It is an essential building block for researchers and manufacturers in the pharmaceutical, biotechnology, and specialty materials sectors who require precise molecular modification and controlled release properties.

Application

• Pharmaceutical Conjugation: A key linker for attaching drug molecules, peptides, or targeting ligands to nanoparticles, polymers, or proteins to enhance solubility, stability, and pharmacokinetics.
• Bioconjugation & PEGylation: Used to modify therapeutic proteins, antibodies, and enzymes to reduce immunogenicity, increase circulation half-life, and improve therapeutic efficacy.
• Polymer & Material Science: Serves as a reactive macromonomer or cross-linking agent for synthesizing hydrogels, smart materials, and functionalized surfaces with tailored properties.
• Diagnostic Reagents: Employed in the development of contrast agents, fluorescent probes, and assay components where biocompatibility and specific conjugation are required.
• Cosmetic & Personal Care Formulations: Acts as a functional ingredient in advanced delivery systems for active compounds in skincare and cosmetic products.

Basic Information

Product Name	Peg5-Acid
CAS No.	937188-59-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	5-Amino-3-oxapentanoic acid 2,5,8,11,14-pentaoxahexadecan-16-oic acid; 2,5,8,11,14-Pentaoxahexadecanedioic acid; 15-Amino-4,7,10,13-tetraoxapentadecanoic acid; PEG5-CH2COOH; Tetraethylene glycol acetic acid; HO-PEG4-CH2COOH; mPEG4-acid; Carboxy-PEG4-alcohol
EINECS	Contact for details

Quality Control

Our Peg5-Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and NMR for structural confirmation, to ensure it meets the high standards required for research and commercial applications. A Certificate of Analysis (COA) detailing all specifications is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (typically 15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture. For long-term storage, consider using desiccants or an inert atmosphere.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 1.0%

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