trans-4-formylcyclohexanecarboxylic acid ethyl ester; CAS No.: 104802-53-1; ChemShuttle specializes in aldehyde-containing esters like trans-4-formylcyclohexanecarboxylic acid ethyl ester for bioconjugation. The aldehyde enables oxime ligation while ester enhances stability. With molecular weight 198.22 and reactivity >90%, it serves as versatile linker. Technical support includes conjugation efficiency optimization data.