WNK1-IN-1 is a selective inhibitor of WNK1 with an IC 50 value of 1.6 μM. WNK1-IN-1 inhibits OSR1 phosphorylation with an IC 50 value of 4.3 μM. WNK1-IN-1 can be used for the research of blood pressure regulation and cancer In Vitro WNK1-IN-1 (0-1000 μM; 30 min) shows high potency to WNK1 with an IC 50 value of 1.6 μM. WNK1-IN-1 (0.2-12.5 μM; 24 h) inhibits endogenous OSR1 phosphorylation with an IC 50 value of 4.3 μM in MDAMB231 breast-cancer cells. WNK1-IN-1 (0-100 mM) is 10-fold more potent to WNK1 than WNK3 in Kinase-Glo assay. MCE has not independently confirmed the accuracy of these methods. They are for reference only. Form:Solid IC50& Target:IC50: 1.6 μM (WNK1), 4.3 μM (OSR1 phosphorylation)