SrCl2

Strontium chloride, with the formula SrCl2, is an inorganic salt composed of strontium ions (Sr2+) and chloride ions (Cl−) in a 1:2 ratio. It forms white, crystalline solids that are highly hygroscopic, meaning they readily absorb water from the air. In water, SrCl2 dissociates into Sr2+ and Cl− ions, producing clear, aqueous solutions. The compound exists in several hydrates, and the anhydrous form can be obtained by careful drying.

SrCl2 is produced commercially by reacting strontium carbonate or strontium oxide with hydrochloric acid. Typical reactions include SrCO3 + 2 HCl → SrCl2 + CO2 + H2O and SrO + 2 HCl → SrCl2 + H2O. The hydrate forms of SrCl2 are common when the compound is exposed to ambient moisture, and dehydration or controlled heating yields the anhydrous salt.

Applications of strontium chloride include use as a source of Sr2+ ions in chemical synthesis and analytical chemistry, and as an electrolyte in the electrolytic production of metallic strontium from molten SrCl2. It is also employed in pyrotechnics to produce a crimson red flame. The hygroscopic nature of SrCl2 can make it useful as a drying agent in certain laboratory contexts, though it is primarily valued for its role as a strontium source.

Safety and handling: SrCl2 is corrosive and can irritate skin and eyes. It should be handled with appropriate personal protective equipment, kept away from moisture where appropriate, and stored in a dry, well-closed container. In case of contact with eyes or skin, rinse promptly with water and seek medical advice if irritation persists.