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Structure of 14918-21-9
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Mal-PEG2-NHS ester is a PEG linker containing a maleimide group and an NHS ester group. The hydrophilic PEG spacer increases solubility in aqueous media. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.
5-Cyano-1-pentyne serves as a versatile building block in synthetic organic chemistry, enabling efficient access to nitrile-containing alkynes for subsequent transformations. Its terminal alkyne functionality facilitates copper-catalyzed azide-alkyne cycloaddition (CuAAC), while the pendant nitrile group offers compatibility with nucleophilic additions and functionalization under mild conditions. The molecule exhibits excellent bench stability and is readily purified by distillation or column chromatography, making it well-suited for use in multistep syntheses of complex heterocycles and pharmaceutical intermediates.
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GHS Pictogram :
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GHS No : GHS02,GHS07
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Signal Word : Danger
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UN#: 1993
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Class : 3
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Packing Group : Ⅲ
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Hazard Statements : H226-H302+H312+H332-H315-H319-H335
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Precautionary Statements : P210-P233-P240-P241-P242-P243-P261-P264-P270-P271-P280-P302+P352-P304+P340-P330-P362+P364-P370+P378-P405-P501
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Lot numbers can be found on the outside label of a product: