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Magnesium sulfate heptahydrate(pharmaceutical grade) CAS NO.7487-88-9
Cas No: 7487-88-9
USD $ 1.0-3.0 / Metric Ton 1 Metric Ton 10 Metric Ton/Day Hebei yanxi chemical co.,LTD. Contact Supplier
Magnesium sulfate heptahydrate(pharmaceutical grade)
Cas No: 7487-88-9
No Data 100 Metric Ton 1000 Metric Ton/Week Triumph International Development Limilted Contact Supplier
Magnesium sulfate
Cas No: 7487-88-9
USD $ 3.0-3.0 / Kilogram 1 Kilogram 1-100 Metric Ton/Month Hangzhou Dayangchem Co., Ltd. Contact Supplier
Negotiable price high purity Magnesium sulfate anhydrous 7487-88-9 with new batch stock
Cas No: 7487-88-9
USD $ 550.0-550.0 / Metric Ton No Data 1 Kilogram/Day Hangzhou Dingyan Chem Co., Ltd Contact Supplier
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Cas No: 7487-88-9
USD $ 1.0-1.0 / Metric Ton 1 Metric Ton 1000 Metric Ton/Day Scale Chemical Corporation Contact Supplier
Magnesium Sulfate factory
Cas No: 7487-88-9
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High quality Magnesium Sulfate 98% supplier in China
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No Data No Data No Data Simagchem Corporation Contact Supplier
magnesium sulphate CAS NO.7487-88-9
Cas No: 7487-88-9
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magnesium sulfate/high quality/factory
Cas No: 7487-88-9
No Data 10 Gram 200 Kilogram/Month Hubei Jusheng Technology Co., Ltd., Contact Supplier
CAS: 7487-88-9 Magnesium sulfate for Chemical reagent and dry reagent
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7487-88-9 Usage


Hydrated magnesium sulfate occurs in nature as the minerals kieserite and epsomite. The salt is mined in large scale from these and other naturally occurring minerals. The salt also is prepared in the laboratory by the action of sulfuric acid on magnesium oxide, hydroxide, or carbonate followed by evaporation and crystallization:
MgO + H2SO4 → MgSO4 + H2O
Mg(OH)2 + H2SO4 → MgSO4 + 2H2O
MgCO3 + H2SO4 → MgSO4 + CO2 + H2O
Crystallization at temperatures between 1.8 and 48°C yields heptahydrate, MgSO4•7H2O. Below 1.8°C, a dodecahydrate , MgSO4•12H2O crystallizes out. Above 48°C crystals of lower hydrates form. The anhydrous salt is obtained by heating the heptahydrate at about 500°C in a rotary drum; or dehydrating above 150°C in the presence of sulfuric acid.


ChEBI: A magnesium salt having sulfate as the counterion.


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.

Purification Methods

Crystallise it from warm H2O (1g/mL) by cooling. Dry the heptahydrate (Epsom salt) at ~250o until it loses 25% of its weight. Its solubility in H2O is 36% at 20o, 55% at 60o and 74% at 100o; above 110o the solubility decreases with rise of temperature. Store it in a sealed container.


1. https://en.wikipedia.org/wiki/Magnesium_sulfate
2. https://www.drugs.com/cdi/magnesium-sulfate.html
3. https://pubchem.ncbi.nlm.nih.gov/compound/magnesium_sulfate
4. http://www.emedicinehealth.com/drug-magnesium_sulfate/article_em.htm


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.


Used for immediate control of life-threatening convulsions in the treatment of severe toxemias (pre-eclampsia and eclampsia) of pregnancy and in the treatment of acute nephritis in children. Also indicated for replacement therapy in magnesium deficiency,

Chemical Properties

Magnesium sulfate (MgS04) is a colorless crystal with a bitter, saline taste. It is soluble in glycerol and used in fireproofing, textile processes, ceramics, cosmetics, and fertilizers.

7487-88-9 Well-known Company Product Price

Brand (Code)Product description CAS number Packaging Price Detail
Sigma (M3409)  Magnesiumsulfatesolution  for molecular biology, 1.00 M±0.04 M 7487-88-9 M3409-100ML 690.30CNY Detail
Sigma (M3409)  Magnesiumsulfatesolution  for molecular biology, 1.00 M±0.04 M 7487-88-9 M3409-10X1ML 363.87CNY Detail
Sigma (M2643)  Magnesiumsulfate  BioReagent, suitable for cell culture, suitable for insect cell culture 7487-88-9 M2643-1KG 560.43CNY Detail
Sigma (M2643)  Magnesiumsulfate  BioReagent, suitable for cell culture, suitable for insect cell culture 7487-88-9 M2643-500G 299.52CNY Detail
Fluka (38146)  Magnesium sulfate concentrate  for 1L standard solution, 0.1 M MgSO4 7487-88-9 38146-1EA 466.83CNY Detail
Sigma-Aldrich (M7506)  Magnesiumsulfate  anhydrous, ReagentPlus®, ≥99.5% 7487-88-9 M7506-25KG 9,065.16CNY Detail
Sigma-Aldrich (M7506)  Magnesiumsulfate  anhydrous, ReagentPlus®, ≥99.5% 7487-88-9 M7506-36X500G 7,581.60CNY Detail
Sigma-Aldrich (M7506)  Magnesiumsulfate  anhydrous, ReagentPlus®, ≥99.5% 7487-88-9 M7506-12KG 4,264.65CNY Detail
Sigma-Aldrich (M7506)  Magnesiumsulfate  anhydrous, ReagentPlus®, ≥99.5% 7487-88-9 M7506-2KG 930.15CNY Detail
Sigma-Aldrich (M7506)  Magnesiumsulfate  anhydrous, ReagentPlus®, ≥99.5% 7487-88-9 M7506-1KG 445.77CNY Detail
Sigma-Aldrich (M7506)  Magnesiumsulfate  anhydrous, ReagentPlus®, ≥99.5% 7487-88-9 M7506-500G 366.21CNY Detail
Aldrich (203726)  Magnesiumsulfate  ≥99.99% trace metals basis 7487-88-9 203726-125G 9,576.45CNY Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017


1.1 GHS Product identifier

Product name magnesium sulfate

1.2 Other means of identification

Product number -
Other names Salts

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Processing Aids and Additives
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

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