Strontium dichloride is an inorganic compound with the chemical formula SrCl2. It is a white crystalline solid that is highly soluble in water. Strontium is a soft, silvery alkaline earth metal in the second column of the periodic table. When strontium reacts with chlorine, it forms Strontium dichloride through a straightforward redox reaction. The resulting compound has many interesting physical and chemical properties that make it useful for various applications.

Physical Properties of Strontium Chloride

Strontium Chloride crystallizes in the orthorhombic crystal system. Its melting point is quite high at 1045°C and it has a boiling point of 1630°C. In the solid state, srontium chloride has a density of 3.31 g/cm3. However, when dissolved in water, it produces a concentrated aqueous solution with a density of around 2.6 g/cm3. Strontium dichloride is highly soluble in water, with 1 gram dissolving in only 0.4 grams of water at room temperature. This high solubility stems from strontium's affinity for water as well as the electronegativity difference between strontium and chloride ions.

Uses in Pyrotechnics and Flares

One of the primary uses of Strontium dichloride is in pyrotechnics and flares due to its flaming properties. When Strontium dichloride is burned, it produces a brilliant red color that is very noticeable even in bright sunlight. For this reason, it has replace calcium chloride in many modern safety flares and fusees that provide visible warning signals. Strontium dichloride produces a longer-lasting glow than older pyrotechnic formulas, thus enhancing safety. It is also used to color fireworks red and make colored smoke shells. The compound decomposes upon heating and releases chlorine gas while strontium atoms emit intense red light.

Get more insights on - Strontium Chloride