Organo-Metalloid Compounds

Sigma Aldrich Fine Chemicals Biosciences Methane electronic grade 9

Methane electronic grade 9

Medchemexpress LLC Methoxy-PEG3 tosylate | 62921-74-8 | MFCD13184964 | 98.8% | 318.39 g/mol | C14H22O6S | 250 MG

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m-PEG3-Tos is a methoxy-terminated PEG3 tosylate used as a short, flexible PEG linker and intermediate in small-molecule synthesis. It provides three ethylene glycol units with a tosylate leaving group, making it suitable for nucleophilic substitution to install PEG chains and build PROTAC linkers or other conjugates.

• Provides three ethylene glycol units for short, flexible spacing.
• Contains a tosylate leaving group suitable for nucleophilic substitution.
• High purity (98.75%) appropriate for synthetic applications.
• Available in small-scale quantities for research use, such as 250 mg.

Medchemexpress LLC 2-(2-(2-methoxyethoxy)ethoxy)ethyl 4-methylbenzenesulfonate | 62921-74-8 | MFCD06200731 | 98.8% | 318.39 | C14H22O6S | 1 G

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m-PEG3-Tos is a tosyl-terminated polyethylene glycol (PEG) linker used in small-molecule synthesis, commonly as a PROTAC linker or as a tosylate alkylating reagent. It provides a PEG3 spacer with a tosyl leaving group for nucleophilic substitution.

• Tosyl-terminated PEG3 linker suitable for building linkers and conjugates.
• Provides a good leaving group for nucleophilic substitution reactions.
• Used in PROTAC linker synthesis and other small-molecule modifications.
• Reported purity approximately 98.8% for select batches.
• Available in small lab pack sizes, including 1 g.

Medchemexpress LLC 2-[2-(2-methoxyethoxy)ethoxy]ethyl 4-methylbenzene-1-sulfonate | 62921-74-8 | MFCD06200731 | 98.8% | 318.39 g/mol | C14H22O6S | 500 MG

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m-PEG3-Tos is a tosyl-terminated polyethylene glycol (PEG) linker used as a reactive PEG3 spacer for conjugation and PROTAC synthesis. The tosyl leaving group enables nucleophilic substitution reactions to attach functional groups or linker arms in medicinal chemistry and bioconjugation workflows.

• Tosyl-terminated PEG3 linker for conjugation and PROTAC synthesis.
• Chemical name: 2-[2-(2-methoxyethoxy)ethoxy]ethyl 4-methylbenzene-1-sulfonate.
• CAS number: 62921-74-8.
• Molecular formula: C14H22O6S.
• Molecular weight: 318.39 g/mol.
• Purity: 98.8%.
• Package size: 500 MG.