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Structure of 933-76-6
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4,5-Dichloro-2-methylpyridazin-3(2H)-one is a bench-stable heterocyclic scaffold featuring two chlorine substituents at the 4 and 5 positions and a methyl group at C2. This electron-deficient core integrates readily into medicinal chemistry campaigns, offering enhanced metabolic stability and strategic reactivity for coupling reactions in drug discovery workflows.
4,5-Dichloro-2-methylpyridazin-3(2H)-one serves as a versatile building block in medicinal chemistry, enabling the construction of heterocyclic scaffolds through nucleophilic substitution and coupling reactions. Its dichloro substitution pattern facilitates selective functionalization at C4 or C5, while the methyl and carbonyl groups offer orthogonal reactivity for downstream derivatization. The compound exhibits bench stability and compatibility with standard purification methods, making it well-suited for scalable synthesis and API development workflows.
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GHS No : GHS06
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Signal Word : Danger
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UN#: 2811
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Class : 6.1
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Packing Group : Ⅲ
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Hazard Statements : H301-H315-H317-H319-H335
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Precautionary Statements : P261-P264-P270-P271-P272-P280-P302+P352-P304+P340-P330-P362-P405-P501
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Lot numbers can be found on the outside label of a product: