硫酸マグネシウム (無水)

解説硫酸マグネシウム，化学式はMgSO4。比重2.66，融点1185℃。無色の結晶。水に溶け，水溶液からは１，６，７，12水和物などが得られる。７水和物が普通で，これは瀉利(しゃり)塩またはエプソム塩ともいい，比重1.68の無色の結晶。乾燥した空気中では風解し，水溶液は苦味がある。紙の充填(じゅうてん)剤，媒染剤，下剤として使用。天然には１水和物がキーゼリットとして岩塩鉱床から得られる。また海水中に存在し，苦汁(にがり)の成分。工業的には苦汁の濃縮，酸化マグネシウムや炭酸マグネシウムの硫酸処理によってつくる。

用途洗剤のビルダー、グラウト剤、固結防止剤

説明Magnesium sulfate is an inorganic salt (chemical compound) containing magnesium, sulfur and oxygen, with the formula MgSO4. It is strongly hygroscopic and often encountered as the heptahydrate sulfate mineral epsomite (MgSO4•7H2O), commonly called Epsom salt. And the monohydrate, MgSO4•H2O, is found as the mineral kieserite. In gardening and other agriculture, magnesium sulfate is used to correct a magnesium or sulfur deficiency in soil. In food preparation, magnesium sulfate is used as a brewing salt in beer production or used as a coagulant for making tofu. In chemistry, anhydrous magnesium sulfate is commonly used as a desiccant in organic synthesis due to its affinity for water. For Marine use, magnesium sulfate heptahydrate is used to maintain the magnesium concentration in marine aquaria which contain large amounts of stony corals. For medicine use, it is used in pregnant women to control seizures due to certain complications of pregnancy (eg, severe toxemia) and to control high blood pressure, severe brain function problems (encephalopathy), and seizures in children who have sudden, severe inflammation of the kidneys (acute nephritis). Besides, magnesium sulfate is also used as a laxative to relieve occasional constipation.

使用Magnesium sulfate is used widely in several industries including fertilizer, cement, textile, chemicals, and medicine. In the cement industry, it is used in manufacturing oxysulfate cement. In medicine, it is an analgesic and cathartic. An important application of anhydrous magnesium sulfate in the laboratory involves drying organic solvents required for syntheses and GC analysis. In the textile industry, magnesium sulfate is used in finishing composition for dressing cotton; for weighting and sizing silk; as a mordant for fixing basic dyestuffs on wool; and in fireproofing fabrics. It also is a component of certain types of electrolytic plating baths; of various photographic solutions; of cosmetic lotions. It is a catalyst carrier; a dietary supplement in cattle feed; a coagulant for rubber and plastic; and is used in making citric acid and several magnesium salts, such as magnesium stearate.

一般的な説明Magnesium sulfate is an anhydrous magnesium salt.