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Tos-PEG4-acid - CAS 1453117-42-4

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Tos-PEG4-acid contains a tosyl group and a terminal carboxylic acid. Tosyl group is a very good leaving group for nucleophilic substitution reaction. Terminal carboxylic acid is easy to react with primary and secondary amines and form stable amide bonds in the presence of activators (e.g. EDC, or DCC) to form a stable amide bond. The hydrophilic PEG spacer increases the solubility in aqueous media.

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Molecular Formula
C16H24O8S
Molecular Weight
376.42

Tos-PEG4-acid

    • Specification
      • Purity
        ≥95%
        Solubility
        Soluble in DMSO
        Appearance
        Pale Yellow or Colorless Oily Matter
        Storage
        Store at 2-8°C for short term (days to weeks) or -20°C for long term (months to years)
        Shipping
        Room temperature in continental US; may vary elsewhere.
        IUPAC Name
        3-[2-[2-[2-(4-methylphenyl)sulfonyloxyethoxy]ethoxy]ethoxy]propanoic acid
        Synonyms
        3-[2-[2-[2-(4-methylphenyl)sulfonyloxyethoxy]ethoxy]ethoxy]propanoic acid; Tos-PEG4-COOH; 3-(2-(2-(2-(tosyloxy)ethoxy)ethoxy)ethoxy)propanoic acid
    • Properties
      • Boiling Point
        548.3±50.0 °C at 760 mmHg
        Density
        1.3±0.1 g/cm3
        InChI Key
        BAXYSSILQKCWFA-UHFFFAOYSA-N
        InChI
        InChI=1S/C16H24O8S/c1-14-2-4-15(5-3-14)25(19,20)24-13-12-23-11-10-22-9-8-21-7-6-16(17)18/h2-5H,6-13H2,1H3,(H,17,18)
        Canonical SMILES
        CC1=CC=C(C=C1)S(=O)(=O)OCCOCCOCCOCCC(=O)O
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