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Magnesium chloride hexahydrate

Chemical Name:
Magnesium chloride hexahydrate
cmh;NEDMAG-C FLAKES;MEGNESIUM CHLORID;Magnisum Chloride;MAGNESII CHLORIDUM;MagnesiumChlorideAr;MagnesiumChlorideUsp;Magnesium chloride h;Magnesium Chloride BP;MAGNESIUM CHLORIDE XTL
Molecular Formula:
Molecular Weight:
MDL Number:
MOL File:
MSDS File:
Last updated:2024-05-28 19:59:05

Magnesium chloride hexahydrate Properties

Melting point 117 °C
Density 1.569
storage temp. 2-8°C
solubility H2O: 1 M at 20 °C, clear, colorless
form Solid
color White to slightly gray
Specific Gravity 1.569
PH 4.5-7.0 (50g/l, H2O, 20℃)
Odor Odorless
PH Range 7
Water Solubility 2350 g/L (20 ºC)
Sensitive Hygroscopic
λmax λ: 260 nm Amax: 0.030
λ: 280 nm Amax: 0.025
Merck 14,5662
Stability Stable. Incompatible with strong oxidizing agents. Protect from moisture.
LogP -1.380 (est)
CAS DataBase Reference 7791-18-6(CAS DataBase Reference)
EWG's Food Scores 1
EPA Substance Registry System Magnesium chloride, hexahydrate (7791-18-6)


Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
Signal word  Warning
Hazard statements  H315-H319
Precautionary statements  P264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  24/25-36-26
WGK Germany  1
RTECS  OM2975000
HS Code  28273100
Toxicity LD50 orally in Rabbit: 8100 mg/kg
NFPA 704
2 1

Magnesium chloride hexahydrate price More Price(132)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 930989 Magnesium chloride hexahydrate 99.999% (trace metals basis) 7791-18-6 10G $133 2024-03-01 Buy
Sigma-Aldrich 930989 Magnesium chloride hexahydrate 99.999% (trace metals basis) 7791-18-6 50G $538 2024-03-01 Buy
Sigma-Aldrich 930970 Magnesium chloride hexahydrate 99.9% trace metals basis 7791-18-6 50G $136 2024-03-01 Buy
Sigma-Aldrich 930970 Magnesium chloride hexahydrate 99.9% trace metals basis 7791-18-6 250G $590 2024-03-01 Buy
Sigma-Aldrich 63033 Magnesium chloride hexahydrate tested according to Ph. Eur. 7791-18-6 1kg $232 2024-03-01 Buy
Product number Packaging Price Buy
930989 10G $133 Buy
930989 50G $538 Buy
930970 50G $136 Buy
930970 250G $590 Buy
63033 1kg $232 Buy

Magnesium chloride hexahydrate Chemical Properties,Uses,Production


Magnesium chloride hexahydrate is the hydrated form of magnesium chloride. Magnesium chloride is a mineral supplement used to prevent and treat low amounts of magnesium in the blood and a versatile compound with a number of uses in food preparation, health and personal well-being areas. Magnesium chloride is also used in road care, to synthesize other magnesium compounds, to remove dyes and industrial dye wastes, for the dust control, in the textile production, and as an industrial dye and dye waste remover. Magnesium chloride hexahydrate is used as catalyst for organic synthesis, e.g. 3,4‐Dihydropyrimidin‐2‐(1H)‐one. Magnesium chloride hexahydrate is also a promising heat/thermal storage material.

Chemical Properties

The pure form of the compound is a colorless monoclinic crystal, but industrial versions typically have a yellowish-brown hue. It has a salty and bitter taste and is deliquescent. It is easily soluble in water and ethanol and will decompose when heated in air, releasing HCl gas around 118°C, which turns into oxychloride. When heated at high temperatures, it decomposes into MgO and HCl.


Used in adjustment of ion strength.


  • Magnesium chloride hexahydrate has been used in wash buffer for the purification of protein from Saccharomyces cerevisiae.
  • It has been used for the preparation of extracellular (Ringer) solution for juxtacellular recording of single neurons in freely moving rats.
  • It has been used as a supplement to study effect of desiccation on bacterial viability.


ChEBI: Magnesium dichloride hexahydrate is a hydrate that is the hexahydrate form of magnesium dichloride. It is a hydrate, a magnesium halide and an inorganic chloride. It contains a magnesium dichloride.

General Description

Magnesium chloride hexahydrate is a colorless, crystalline solid. On heating, it loses water of crystallization and affords magnesium oxide. It has been tested as a potential phase change material (PCM) for use in cooking indoors and during the low intensity solar radiation periods. Due to its suitable thermo-physical properties, it can be used as storage media in solar cookers. Its flame retardancy action on 100% woven cotton fabric has been investigated. Its heat capacity has been evaluated.

Pharmaceutical Applications

Magnesium Chloride Hexahydrate is often used in pharmaceuticals due to its high solubility. It is used to manufacture a range of medications that address various health concerns. It is also used as a source of magnesium in nutritional supplements. While it does not treat conditions by itself, it can help those with low magnesium levels improve certain bodily functions. In addition, magnesium chloride supplements have well-documented uses in type 2 diabetes, high blood pressure, osteoporosis, and migraines.

Industrial uses

Magnesium chloride hexahydrate can be used as a firming agent, nutrient supplement, or flavor enhancer in various food and beverage products as an FCC-grade product. It plays a vital role in maintaining the product's overall quality.
This compound is used in various cosmetic and skincare formulations due to its beneficial properties. It can help absorb other nutrients in the skin and functions as a cleanser and purifier.
Aside from pharmaceutical and food uses, this compound also has industrial applications, such as in manufacturing fireproofing agents and cement, due to its unique chemical properties.

Purification Methods

Crystallise it from hot water (3.3g/mL) by cooling. Dry it in a vacuum at ~175o, or heat the hydrate in a stream of HCl. When the hydrate is heated above 180o it is hydrolysed to the oxychloride (Mg2OCl2). It is deliquescent; store it in a well-stoppered vessel. [Bryce-Smith Inorg Synth VI 9 1960, Ehrlich in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 908 1963.]


[1] Radim Pilar, Ladislav Svoboda, Pavla Honcova and Lucie Oravova, Study of magnesium chloride hexahydrate as heat storage material, Thermochimica Acta, 2012, vol. 546, 81-86 DOI:10.1016/J.TCA.2012.07.021
[2] Guo-Lin Zhang and Xiao-Hua Cai, Magnesium Chloride Hexahydrate Catalyzed One‐Pot Synthesis of 3,4‐Dihydropyrimidin‐2‐(1H)ones Under Solvent‐Free Conditions, Synthetic Communications, 2006, 829-833 DOI:10.1081/SCC-200050956
[3] BH Tan, TT Teng and AKM Omar, Removal of dyes and industrial dye wastes by magnesium chloride, Water Research, 2000, vol. 34, 597-601 DOI:10.1016/S0043-1354(99)00151-7
[4] Purification of Laboratory Chemicals DOI:10.5860/choice.50-6768

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View Lastest Price from Magnesium chloride hexahydrate manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
Magnesium chloride hexahydrate pictures 2024-07-10 Magnesium chloride hexahydrate
US $6.00 / KG 1KG 99% 20TONS Hebei Longbang Technology Co., Ltd
Magnisum Chloride pictures 2024-05-28 Magnisum Chloride
US $10.00 / kg 1kg 99% 20ton Hebei Zhuanglai Chemical Trading Co.,Ltd
Magnesium chloride hexahydrate pictures 2024-04-12 Magnesium chloride hexahydrate
US $6.00 / KG 1KG More than 99% 500KG/Month Hebei Saisier Technology Co., LTD

Magnesium chloride hexahydrate Spectrum

Magnesium Chloride, Hexahydrate. USP/FCC MAGNESIUM CHLORIDE HEXAHYDRATE BIOXT Magnesium chloride hexahydrate for analysis EMSURE ACS,ISO,Reag. Ph Eur MAGNESIUM CHLORIDE HEXAHYDRATE*CELL MAGNESIUM CHLORIDE HEXAHYDRATE, FOR Magnesium chloride hexahydrateACS reagent, 99.0-102.0% (Titration) Magnesium chloride hexahydrateAnalytical Reagent Grade, ≥ 99.0% (Assay) Magnesium chloride hexahydrate, 99.999% trace metals basis 1mol/l-Magnesium Chloride Solution, Sterile-filtered and Autoclaved magnesium chloride 25 mm solution*pcr Magnesium Chloride BP magnesium chloride sterile filtered*solution Magnesium Chloride, 6H2O, MB Grade (1.05835) Magnesium chloride hexahydrate, for analysis ACS Magnesium Chloride, Hexahydrate, Crystal, Reagent Magnesium Chloride Hexahydrate, Meets analytical specification of Ph. Eur.BP, FCC Magnesium Chloride Hexahydrate (Crystalline/Cell Culture) Magnesium Chloride, Hexahydrate, EMSURE?, For Analysis Magnesium chloride hexahydrate, hexahydrate chloruredemagnesiumhydrate MEGNESIUM CHLORID MAGNESIUM CHLORIDE FLAKES PURITY MORE THA MAGNESIUM CHLORIDE-6-HYDRATE R. G., REAG . ACS, REAG. ISO MAGNESIUM CHLORIDE HEXAHYDRATE ACS & MAGNESIUM CHLORIDE HEXAHYDRATE, 4X10 G MAGNESIUM CHLORIDE HEXAHYDRATE USP MAGNESIUM CHLORIDE HEXAHYDRATE*SIGMAULTR A MAGNESIUM CHLORIDE HEXAHYDRATE, FOR MOLE CULAR BIOLOGY MAGNESIUM CHLORIDE HEXAHYDRATE, 99.995% MAGNESIUM CHLORIDE HEXAHYDRATE, REAGENT- PLUS, 99.99% MAGNESIUM CHLORIDE HEXAHYDRATE, PH EUR MAGNESIUM CHLORIDE HEXAHYDRATE, REAGENTPLUS TM, >= 99.0% MAGNESIUM CHLORIDE HEXAHYDRATE MAX.0,0001 % AL, PURISS., PH-QUALITY MAGNESIUM CHLORIDE HEXAHYDRATE*CELL CULT URE TESTED MAGNESIUM CHLORIDE HEXAHYDRATE, 99%, A.C .S. REAGENT MAGNESIUM CHLORIDE, VOLUMTERIC SOLUTION 0.1MOL/L MAGNESIUM CHLORIDE HEXAHYDRATE, GR ACS 99+% Magnesium Chloride, 64% Solution MAGNESIUM CHLORIDE extrapure AR Magnesium chloride hexahydrate, 99%, for analysis Magnesium chloride hexahydrate,99+%,for analysis ACS BUFFER PH7,00 (20°C) AVS TITRINORM NADH NICOTINAMIDE ADENINE DINUCLEOTIDE R Magnesiumchloride,mecidinal magnesiumdichloridehexahydrate Magnesium chloride hexahydrate, for analysis ACS, 99+% MAGNESII CHLORIDUM MAGNESIUM CHLORIDE HEXAHYDRATE MAGNESIUM CHLORIDE HYDRATE MAGNESIUM CHLORIDE, HYDROUS MAGNESIUM CHLORIDE 6H2O MAGNESIUM CHLORIDE, 6-HYDRATE Magnesium chloride (MgCl2), hexahydrate magnesium chloride hexahydrate, puratronic MAGNESIUMCHLORIDE,HEXAHYDRATE,BIOTECHGRADE MAGNESIUMCHLORIDE,HEXAHYDRATE,CRYSTAL,REAGENT,ACS MAGNESIUMCHLORIDE,HEXAHYDRATE,CRYSTAL,USP,EP,BP MAGNESIUMCHLORIDE,HEXAHYDRATE,FLAKE,FCC