d031b852_ध_रस_यन___क__स_च____व_क_प_ड_य___Source_and_description
[Chemical name] magnesium sulfate [Chemical formula] MgSO47H2O [Common or alternative name] Epsom Salt [Source and description] 
Epsom salt is sold at most drug stores and is used as a laxative or as an anti-inflammatory soak. Also available as a chemical for photographic development.
सरलता से उपलब्ध रसायनों की सूची - विकिपीडिया