m-PEG13-acid is a polyethylene glycol (PEG) linker bearing a terminal carboxylic acid used in bioconjugation and PEGylation chemistry. It provides a hydrophilic spacer that facilitates formation of amide bonds to primary amines after activation, improving solubility and flexibility of conjugates. Typical identifiers: molecular weight ~632.74 g·mol⁻¹, formula C28H56O15, CAS 2170098-33-4, purity >95.0%.
- Acts as a hydrophilic spacer for bioconjugation.
- Contains a terminal carboxylic acid for amide bond formation with primary amines.
- Improves solubility and flexibility of conjugated molecules.
- Compatible with common coupling agents such as EDC and HATU.
- Supplied at >95.0% purity for research applications.