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  • (9)
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1

Medchemexpress LLC M-PEG-thiol | 134874-49-0 | MFCD21363241 | 99.0% | 550 (average) g/mol | (C2H4O)nC3H8OS | 100 MG

m-PEG-thiol (MW 550) is a methoxy-terminated polyethylene glycol with a terminal thiol group. It is supplied as a research-grade reagent for introducing thiol functionality to biomolecules or surfaces, commonly used for conjugation to gold nanoparticles and in bioconjugation chemistry. The product has an average molecular weight of 550 and is supplied with high purity for research applications.

  • Provides a thiol functional group for covalent conjugation to maleimides and gold surfaces.
  • Suitable for DNA thiolation and assembly of gold nanorod constructs.
  • Supplied at research-grade purity for reproducible experimental results.
  • Soluble in DMSO (200 mg/mL with sonication) for convenient stock preparation.
  • Average molecular weight of 550 for consistent PEGylation behavior.

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2

Medchemexpress LLC m-PEG-thiol | 134874-49-0 | MFCD00803682 | 90.0% | 750 (average) | (C2H4O)nC3H8OS | 250 MG

m-PEG-thiol (average MW 750) is a methoxy-terminated polyethylene glycol bearing a terminal thiol group, supplied as a solid reagent for bioconjugation and nanoparticle surface functionalization. It is commonly used to thiolate DNA and to anchor polymers or biomolecules onto gold and other metal surfaces via thiol-gold chemistry, supporting applications in nanostructure assembly, biosensing, and drug delivery.

  • Provides terminal thiol for covalent attachment to metal surfaces and thiol-reactive chemistries.
  • Average molecular weight 750 for a short PEG spacer length.
  • Supplied as a solid suitable for solution-phase conjugation.
  • Reported purity approximately 90%.
  • Compatible with DNA thiolation and nanoparticle surface modification protocols.

ENCOMPASS_PREFERRED
3

Medchemexpress LLC Methoxy polyethylene glycol thiol | 134874-49-0 | MFCD00084534 | 90.0% | 750 (average) | (C2H4O)nC3H8OS | 100 MG

m-PEG-thiol (MW 750) is a methoxy-terminated polyethylene glycol with a thiol (-SH) end group used to introduce thiol functionality onto biomolecules and surfaces. It facilitates conjugation to gold and other thiol-reactive substrates for nanoparticle functionalization and bioconjugation. The material has an average molecular weight of 750 and a typical purity of 90.0%.

  • Thiol-terminated for efficient conjugation to gold and thiol-reactive chemistries.
  • Average molecular weight 750 for predictable steric and solubility properties.
  • Useful for DNA thiolation and nanoparticle surface modification.
  • Solid form suitable for small-scale reactions and surface treatments.
  • Available in a 100 MG pack for laboratory-scale use.

ENCOMPASS_PREFERRED
4

Medchemexpress LLC m-PEG-thiol | 134874-49-0 | MFCD21363241 | 90.0% | 750 Da (average) | (C2H4O)nC3H8OS | 500 MG

m-PEG-thiol (MW 750) is a methoxy-terminated polyethylene glycol with a terminal thiol group used for bioconjugation and surface modification. It provides a hydrophilic spacer for attaching biomolecules and for stabilizing or functionalizing metal nanoparticles via thiol-metal chemistry.

  • Average molecular weight 750 Da.
  • Thiol-terminated methoxy polyethylene glycol for surface attachment.
  • Suitable for DNA thiolation and gold nanoparticle functionalization.
  • Purity 90.0%.
  • Liquid, colorless to light yellow; store cold (pure form -20°C) to preserve stability.

ENCOMPASS_PREFERRED
5

Medchemexpress LLC M-PEG-thiol | 134874-49-0 | MFCD21363241 | 99.0% | 550 (average) | (C2H4O)nC3H8OS | 500 MG

m-PEG-thiol (average MW 550) is a methoxy-terminated polyethylene glycol with a terminal thiol group used to introduce thiol functionality onto surfaces or biomolecules. It is supplied for laboratory research and enables PEGylation and surface bioconjugation.

  • Average molecular weight 550 provides a short PEG spacer
  • Terminal thiol enables covalent attachment to gold, maleimide reagents, and disulfide exchange
  • High reported purity suitable for research applications
  • Available in small pack sizes for research workflows, e.g., 500 mg
  • Store sealed at -20°C, protected from moisture

ENCOMPASS_PREFERRED
6

Medchemexpress LLC M-PEG-thiol | 134874-49-0 | MFCD21363241 | 98.7% | (C2H4O)nC3H8OS | 50 MG

m-PEG-thiol (MW 1000) is a methoxy-terminated polyethylene glycol bearing a terminal thiol group. Supplied as a white to light yellow solid with an average molecular weight of approximately 1000 Da, it is used to introduce thiol functionality for surface modification, nanoparticle functionalization, and bioconjugation.

  • Provides a terminal thiol group for gold-thiol conjugation and thiol-maleimide coupling.
  • Suitable for surface modification of nanoparticles and thiolation of nucleic acids.
  • High purity (98.66%) supporting reproducible conjugation chemistry.
  • Physical form solid; color white to light yellow.
  • Available in 50 MG and larger pack sizes.

ENCOMPASS_PREFERRED
7

Medchemexpress LLC M-peg-thiol (mw 550) | 134874-49-0 | MFCD21363241 | 99.0% | 550 (average) | (C2H4O)nC3H8OS | 1 G

m-PEG-thiol (average molecular weight 550) is a methoxy-terminated polyethylene glycol with a terminal thiol (mPEG-SH) used to introduce PEGylation and thiolation onto biomolecules and nanoparticle surfaces. It is commonly employed to modify DNA for loading onto gold nanorods and to provide a reactive thiol for surface conjugation.

  • Provides a terminal thiol for covalent surface conjugation.
  • Imparts steric stabilization and improved solubility to modified molecules.
  • Average molecular weight of 550 for short PEG linker applications.
  • High purity suitable for biochemical and nanomaterials research.
  • Available in multiple pack sizes for flexible experimental use.

ENCOMPASS_PREFERRED
8

Medchemexpress LLC M-PEG-thiol | 134874-49-0 | MFCD21363241 | 99.0% | 550 (average) | (C2H4O)nC3H8OS | 250 MG

m-PEG-thiol (MW 550) is a monofunctional methoxy polyethylene glycol terminated with a free thiol (-SH). It has an average molecular weight of 550 Da and is supplied as a solid for research use in surface functionalization, bioconjugation, and nanoparticle modification.

  • Provides a terminal thiol for selective conjugation to maleimide or gold surfaces.
  • Average molecular weight of 550 Da for controlled PEGylation.
  • High purity suitable for research applications (reported ~98.98%).
  • Available in lab-scale pack sizes for method development and small-batch experiments.
  • Stable when stored sealed and protected from moisture; follow cold storage recommendations for solutions.

ENCOMPASS_PREFERRED
9

Medchemexpress LLC M-PEG-thiol | 134874-49-0 | MFCD21363241 | 98.7% | 1000 (average) | (C2H4O)nC3H8OS | 100 MG

m-PEG-thiol (MW 1000) is a methoxy-terminated polyethylene glycol with a terminal thiol group used for surface modification and bioconjugation. The thiol enables covalent attachment to metal and nanoparticle surfaces, while the PEG chain provides steric stabilization and improves solubility and biocompatibility.

  • Methoxy-terminated PEG with a terminal thiol functional group.
  • Average molecular weight 1000 for predictable spacer length.
  • Enables covalent attachment to gold and other metal surfaces.
  • Provides steric stabilization and reduces nanoparticle aggregation.
  • Suitable for bioconjugation of DNA, proteins, and antibodies.
  • Supplied as a solid in a 100 mg unit with purity ~98.7%.
  • Store protected from light; follow recommended cold storage for solutions.

ENCOMPASS_PREFERRED