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Structure of 294-93-9
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12-Crown-4 is a crown ether generally used as a ligand in coordination chemistry. It is also known as lithium ionophore because of its strong chelating property specific to lithium cation.12-Crown-4 can be used as: A promoter in the synthesis of poly(diethylsiloxane) (PDES) from monomer hexaethylcyclotrisiloxane using NaOH as a catalyst via anionic ring-opening polymerization. As an additive in the preparation of triarylmethane derivatives by palladium-catalyzed cross coupling reaction of aryl bromides with diarylmethane derivatives. A phase transfer catalyst in organic synthesis.
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GHS Pictogram :
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GHS No : GHS06
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Signal Word : Danger
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UN#: 2810
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Class : 6.1
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Packing Group : Ⅱ
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Hazard Statements : H330
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Precautionary Statements : P260-P271-P284-P304+P340-P405-P501
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Lot numbers can be found on the outside label of a product: