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ethyl 3-bromo-4-methyl-1H-pyrazole-5-carboxylate; CAS No.: 1257861-04-3; Ethyl 3-bromo-4-methyl-1H-pyrazole-5-carboxylate, a brominated pyrazole ester, is part of our **chem blocks** for agrochemical and pharmaceutical applications (excluding agriculture). The bromo substituent supports cross-coupling reactions, while the ester offers hydrolytic versatility. As a **Leading Chemicals Distributor**, we prioritize scalable synthesis routes and GC/MS validation to ensure batch consistency for global clients engaged in fragment-based drug design.