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Medchemexpress LLC 4,7,10,13-tetraoxatetradecanoic acid, 2,5-dioxo-1-pyrrolidinyl ester | 622405-78-1 | MFCD11041112 | >95.0% | 333.33 g·mol⁻¹ | C14H23NO8 | 250MG
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Supplier:  Medchemexpress LLC HY124323250MG

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m-PEG4-NHS ester is a methyl-terminated polyethylene glycol linker bearing an N-hydroxysuccinimide (NHS) ester functional group. It reacts with primary amines to form stable amide bonds and is used for PEGylation, bioconjugation, and as a linker in PROTAC synthesis. The compound has molecular weight 333.33 g·mol⁻¹, chemical formula C14H23NO8, and CAS 622405-78-1; consult the certificate of analysis for batch-specific purity and storage instructions.

  • Methyl-terminated PEG4 backbone with an active NHS ester for amine coupling.
  • Suitable for PROTAC linker assembly and general bioconjugation workflows.
  • Molecular weight 333.33 g·mol⁻¹ and formula C14H23NO8 for accurate formulation.
  • High purity: ≥95.0% as reported on batch certificate of analysis.
  • Recommend storage: pure form -20 °C; in solvent -80 °C for up to 6 months.

Catalog No. 50-002-35371


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