3-Indoleacetic acid (IAA) yog ib hom tshuaj endogenous auxin ubiquitous hauv cov nroj tsuag, uas yog cov khoom sib xyaw indole. Nws yog cov organic. Cov khoom ntshiab yog xim tsis muaj kob daj los yog siv lead ua hmoov. Tig mus rau xim sawv thaum raug lub teeb. Nws yog yooj yim soluble hauv meej ethanol, ethyl acetate, dichloroethane, thiab soluble hauv ether thiab acetone. Insoluble hauv benzene, toluene, roj av thiab chloroform. 3-Indoleacetic acid muaj cov khoom sib txawv rau kev cog kev loj hlob, thiab cov khoom sib txawv ntawm cov nroj tsuag muaj cov rhiab sib txawv rau nws.