Calcium chloride (CaCl2) is an ionic compound used for calcium supplementation in conditions like hypocalcemia and hyperkalemia and as an antidote for magnesium toxicity. It also functions as a co-adjuvant in hemostatic formulations and effectively treats refractory hypotension and complete heart block. It enhances the activity of MoPtc1 and MoPtc2, type 2C protein phosphatases involved in the ionic stress response and MAPK signalling regulation in Magnaporthe oryzae. It can also be used as a desiccant and dehydrating agent.