Ammonium sulphite by Research Lab Fine Chem Industries is a high grade reagent. Also known as diammonium sulphite, this compound is an ammonium salt of sulphurous acid. This reagent is available as a white powder which is soluble in water and insoluble in acetone and alcohol. It has a melting point of 65 C at which it decomposes. Ammonium sulphite can be synthesized by the reaction of ammonia with sulfur dioxide in aqueous solution. CAS No.: 10196-04-0 Quantity Provided: 500 gm per bottle Molecular Formula: (NH4)2SO3 Molecular Weight: 116.14 Assay: Minimum 20 %Ammonium sulphite has a variety of applications in chemical and biological sectors. This compound is used as is caramel colouring in the food industry. While in cosmetics, ammonium sulphite is used as a hair straightening agent and a hair waving agent. It is furthermore used as a preservative for fixers in photography, making of bricks, used in gas scrubbers, used in lubricants for cold metal working etc. This reagent is suitable for industrial synthesis of products and research applications.