Magnesium chloride hexahydrate
CAS 7791-18-6
EC 232-094-6
Formula Cl2Mg.6H2O
MW 203.3 g/mol
Salts & Minerals Water TreatmentFood & NutritionAgriculture & FeedPharmaceuticals & HealthcareMining & MetalsOil, Gas & Energy Chelation & SequestrationCoagulation & FlocculationpH Regulation & Buffering
Description
Magnesium chloride hexahydrate (CAS 7791-18-6, formula Cl2Mg.6H2O) is an inorganic magnesium salt available under trade names including Crystallin Cs and the abbreviation CMH. It carries no E-number designation and is listed in pharmacopoeial references as Magnesii Chloridum.
In water treatment, it acts as a coagulant by destabilising suspended particles, allowing them to aggregate and settle. In oil and gas drilling fluids, it functions as a density-control additive and clay stabiliser. Food and pharmaceutical manufacturers use it as a magnesium source and pH buffer in mineral fortification and tablet formulation.
Magnesium chloride hexahydrate is supplied in food-grade (FCC), pharmaceutical-grade (Ph.Eur.), and technical-grade specifications. It is registered under REACH and complies with applicable EU regulations for its respective application sectors. Packaging typically includes 25 kg bags and bulk quantities depending on grade and application requirements.
In water treatment, it acts as a coagulant by destabilising suspended particles, allowing them to aggregate and settle. In oil and gas drilling fluids, it functions as a density-control additive and clay stabiliser. Food and pharmaceutical manufacturers use it as a magnesium source and pH buffer in mineral fortification and tablet formulation.
Magnesium chloride hexahydrate is supplied in food-grade (FCC), pharmaceutical-grade (Ph.Eur.), and technical-grade specifications. It is registered under REACH and complies with applicable EU regulations for its respective application sectors. Packaging typically includes 25 kg bags and bulk quantities depending on grade and application requirements.
Physical Properties
| Melting Point | 111 °C |
| Density | 1.56 g/cm³ |
| Appearance | White crystalline powder |
| Color | White to slightly gray |
| Odor | Odorless |
| Form | Solid |
| Water Solubility | 2350 g/L (20 ºC) |
| pH | 4.5-7.0 (50g/l, H2O, 20℃) |
| Log P | -1.380 (est) |
Trade & Regulatory
| HS Code | 28273100 |
| Storage Class | 13 - Non Combustible Solids |
| WGK (Germany) | 1 |
Other Names
cmhCrystallin CsMAGNESIUM CHLORIDEMAGNESII CHLORIDUMMAGNESIUM CHLORIDE 6H2OMAGNESIUM CHLORIDE HYDRATEchloruredemagnesiumhydrateMagnesiumchloride,mecidinalMAGNESIUM CHLORIDE, HYDROUS
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