Carboxylic acid functionalized methoxyl polyethylene glycol, PEG acid (mPEG-COOH) is a mono reactive PEG derivative that can be used to modify proteins, peptides and other materials via amino or other acid reactive chemical groups. PEGylation can increase solubility and stability and reduce immunogenicity of peptides and proteins. It can also suppress the non-specific binding of charged molecules to the modified surfaces.

Specifications

Specifications & Purity

MW 550 Da

Storage

Protected from light,Store at -20°C,Argon charged

Shipped In

Ice chest + Ice pads

This product requires cold chain shipping. Ground and other economy services are not available.

Advanced Data

Certificates (CoA,COO,BSE/TSE and Analysis Chart)

C of A & Other Certificates(BSE/TSE, COO):

Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

9 results found

Lot Number	Certificate Type	Date	Item
A2411327	Certificate of Analysis	Oct 09, 2026	C163414
H1723051	Certificate of Analysis	Jun 15, 2026	C163414
I2515570	Certificate of Analysis	Sep 04, 2025	C163414
K2414516	Certificate of Analysis	Nov 01, 2024	C163414
K2414529	Certificate of Analysis	Nov 01, 2024	C163414
A2411303	Certificate of Analysis	Dec 28, 2023	C163414
K2310219	Certificate of Analysis	Nov 02, 2023	C163414
K2310220	Certificate of Analysis	Nov 02, 2023	C163414
B2207311	Certificate of Analysis	Jan 10, 2022	C163414

Chemical and Physical Properties

Solubility	Off-white/white solid or viscous liquid depends on molecule weight;Soluble in regular aqeous solution as well as most organic solvents;
Sensitivity	Light sensitive

Documents & Articles

General Conjugation Protocols of PEG linkers——PEG Acid

Categories: Technical Articles: Reagent Chemistry, Synthesis & Bioscience Guides

Tags:

Buffer Polyglycolic acid Aqueous solution method organic solvent method

Solution Calculators

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Reconstitution Calculator

Reviews

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Related Products

mPEG-COOH - MW 2000 Da , CAS No.67665-18-3

mPEG-COOH - ≥95%, MW 350 Da

mPEG-COOH - ≥95%, MW 30000 Da

mPEG-COOH - MW 750 Da

mPEG-COOH - MW 3000 Da

mPEG-COOH - ≥95%, MW 20000 Da

mPEG-COOH - MW 10000 Da

mPEG-COOH - MW 40000 Da

mPEG-COOH - MW 1000 Da

mPEG-COOH - MW 5000 Da

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mPEG-COOH - MW 550 Da

Overview