KMgSO4Cl3H2O
KMgSO4Cl3H2O is an inorganic salt comprising potassium, magnesium, sulfate, chloride, and a water of crystallisation. Its molecular formula can be represented as KMg(SO4)Cl3·H2O and it is sometimes referred to as potassium magnesium trichlorosulfate monohydrate. The compound crystallises in a monoclinic lattice and typically appears as a pale yellow to colorless hygroscopic powder. The presence of both sulfate and chloride anions provides this salt with distinctive solubility characteristics: it dissolves readily in water to give a clear, colourless solution, but is less soluble in ethanol or dilute organic solvents. Because of its mixed halide and oxyanion character, it is sometimes employed as a laboratory reagent in the preparation of magnesium or potassium halides.
Preparation routes for KMgSO4Cl3H2O usually involve a double displacement reaction between a soluble chloride salt of
In terms of safety, the compound should be handled with standard laboratory precautions. It is non‑toxic in