Indole-3-butyric acid

Indole-3-butyric acid (IBA, CAS 133-32-4) is a strategically functionalized indole derivative renowned for its auxin-like plant growth regulatory activity and versatile applications in agricultural biotechnology and medicinal chemistry. This molecule integrates an indole core—a privileged nitrogen heterocycle prevalent in bioactive natural products—with a butyric acid side chain at the C3 position, creating an optimal spatial arrangement for auxin receptor binding. The four-carbon linker between the indole ring and carboxylic acid moiety provides conformational flexibility essential for biological activity, while the carboxyl group enables salt formation, esterification, or amide coupling for formulation optimization. Beyond agriculture, this scaffold serves as a valuable building block for synthesizing CNS-penetrant drug candidates, serotonin receptor modulators, and tryptophan-mimetic therapeutics. Manufactured with purity ≥98-99% under controlled conditions, it supports agrochemical development programs requiring reliable auxin analogs for rooting promotion, plant tissue culture, and crop yield enhancement, as well as pharmaceutical research exploring indole-based bioactive compounds.