Kallikrein 5-IN-2 TFA is the TFA salt form of Kallikrein 5-IN-2. Kallikrein 5-IN-2 TFA is a selective inhibitor for kallikrein 5 ( KLK5 ) with pIC 50 of 7.1. Kallikrein 5-IN-2 TFA is non-phototoxic (100 μg/mL) and non-irritant. Kallikrein 5-IN-2 is stable at pH 4-pH 8 under non-oxidative condition. Kallikrein 5-IN-2 is potent in ameliorating the Netherton syndrome.