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Magnesium perchlorate

Physical Properties Preparation Reactions
Magnesium perchlorate
Magnesium perchlorate structure
Chemical Name:
Magnesium perchlorate
XKM 300;KhKM 300;dehydrite;ANHYDRONE;ANHYDRONE(R);anhydrous magnesium;MAGNESIUM PERCHORATE;MAGNESIUM PERCHLORATE;perchloratedemagnesium;Magnesium diperchlorate
Molecular Formula:
Formula Weight:
MOL File:

Magnesium perchlorate Properties

Melting point:
251 °C
2,21 g/cm3
Specific Gravity
Water Solubility 
Magnesium perchlorate is soluble in water, ethanol.
Stable, but moisture sensitive. Oxidizer - contact with combustible material may lead to fire. Incompatible with reducing agents, organic materials, trimethyl phosphate, powdered metals, strong acids, phosphorus.
CAS DataBase Reference
10034-81-8(CAS DataBase Reference)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  O,Xi
Risk Statements  8-36/37/38-14/15
Safety Statements  17-26-27-36/37/39-43-7/8
RIDADR  UN 1475 5.1/PG 2
WGK Germany  3
RTECS  SC8925000
HazardClass  5.1
PackingGroup  II
HS Code  28299010
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H272 May intensify fire; oxidizer Oxidising liquids;Oxidising solids Category 2
Category 3
P210, P220, P221P280, P370+P378,P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P220 Keep/Store away from clothing/…/combustible materials.
P221 Take any precaution to avoid mixing with combustibles/…
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.

Magnesium perchlorate price More Price(11)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 222283 Magnesium perchlorate ACS reagent 10034-81-8 5g $40 2018-11-13 Buy
Sigma-Aldrich 222283 Magnesium perchlorate ACS reagent 10034-81-8 100g $81 2018-11-13 Buy
Alfa Aesar 011636 Magnesium perchlorate, anhydrous, ACS 10034-81-8 100g $53.9 2018-11-16 Buy
Alfa Aesar 011636 Magnesium perchlorate, anhydrous, ACS 10034-81-8 500g $149 2018-11-16 Buy
Strem Chemicals 93-1246 Magnesium perchlorate, reagent (99.9%-Mg) 10034-81-8 50g $24 2018-11-13 Buy

Magnesium perchlorate Chemical Properties,Uses,Production

Physical Properties

White granular or flaky powder; highly deliquescent; density 2.21 g/cm3; decomposes at 251°C; very soluble in water (99.3g/100mL at 18°C); soluble in ethanol (24g/100mL) at 25°C.
Hexahydrate constitutes white rhombohedral crystals; refractive index 1.482; density 1.98 g/cm3; melts around 185°C; very soluble in water, releasing heat.


Magnesium perchlorate may be prepared by adding perchloric acid to an aqueous solution of magnesium hydroxide. Crystallization yields hexahydrate, Mg(ClO4)2•6H2O.
Mg(OH)2 + 2HClO4 → Mg(ClO4)2 + H2O


Magnesium perchlorate is a strong oxidizing agent. In aqueous solutions and in acid medium the most conspicuous reactions are those involving oxidation— characteristic of the oxidizing action of perchlorate ion, ClO4¯.
Thermal decomposition in the presence of a catalyst, such as manganese dioxide, yields magnesium chloride and oxygen:
Mg (ClO4)2→MgCl2 + 4O2


Magnesium perchlorate is a powerful oxidizing agent, with the formula Mg(ClO4)2. Magnesium perchlorate decomposes at 250°C. The heat of formation is 568.90 kJ/mol. If water is added to magnesium perchlorate, the reaction is highly exothermic and may cause damage to the eyes. Thus, this salt should be added to a sufficient amount of water in order to form a dilute solution.
Mg(ClO4)2·6H2O is composed of white, deliquescent crystals which are soluble in water and alcohol but explosive when in contact with reducing materials. This compound is used as a drying agent for gases. This salt is highly exothermic when added to water and releases steamy HCl gas. It can be dried to form the anhydrate by heating to 250°C under vacuum. The hexahydrate losses two molecules of water at 244°C in air and further decomposes to the dihydrate at 336°C and the anhydrate at 438°C.
The anhydrate has been used as a desiccant to dry gas streams or air samples. However, it is no longer used since perchlorates tend to form explosive compounds with a variety of organic materials as well as other substances.

Chemical Properties

Magnesium perchlorate is a white crystalline solid.

Chemical Properties

White crystals. Deliquescent; very soluble in water and alcohol.


As a drying agent for gases. The article of commerce may contain an amount of water equivalent to a dihydrate, but even the trihydrate is said to be effective for drying gases.


Magnesium perchlorate can be prepared by reacting magnesium carbonate with a solution of perchloric acid:
MgCO3+ HClO4→Mg(ClO4)2+ CO2
This salt can also be prepared by an electrochemical method in water whereby magnesium perchlorate is formed fr

General Description

A white crystalline solid. Strongly absorbs water from air and dissolves in it. Accordingly, used as a regenerable drying agent. May explode under prolonged exposure to heat or fire.

Reactivity Profile

Magnesium perchlorate is a strong oxidizing agent. Decomposes at 185-190°C [Hawley]. Noncombustible but accelerates the burning of combustible materials. If large quantities are involved in the fire or the combustible material is finely divided an explosion may result. Avoid contact with mineral acids because of the danger of explosion. In the preparation of anhydrous dimethyl sulfoxide by vacuum distillation from anhydrous Magnesium perchlorate, an explosion occurred [MCA Case History 1187, 1966]. Drying ethylene oxide with Magnesium perchlorate resulted in an explosion [NSC Newsletter. Chem. Soc. 1959]. Magnesium perchlorate used in drying hydrocarbons exploded when heated to 220°C [Ind. & Eng. News 17:70. 1939]. As soon as trimethyl phosphite contacted a small amount of Magnesium perchlorate in a flask, there was a flash and an explosion that shattered the flask [Allison 1968].


Dangerous fire and explosion risk in contact with organic materials.

Health Hazard

Inhalation of dust irritates mucous membranes. Ingestion of large amounts may be fatal; immediate symptoms include adominal pains, nausea and vomiting, diarrhea, pallor, blueness, shortness of breath, unconsciousness. Contact with eyes or skin causes irritation.

Fire Hazard

Behavior in Fire: Can form explosive mixture with combustible material or finely powdered metals. Increases the intensity of fires.

Safety Profile

Moderately toxic by intraperitoneal route. Severe slun and eye irritant. A powerful oxidner which has caused many explosions in industry. Potentially explosive reactions with alkenes (above 22OoC), ammonia, aryl hydrazine + ether, dimethyl sulfoxide + heat, ethylene oxide, fluorobutane + water, organic materials, phosphorus, trimethyl phosphate. Reacts to form explosive products with ethanol (forms ethyl perchlorate), cellulose + dinitrogen tetraoxide + oxygen (forms cellulose nitrate). Avoid contact with mineral acids, but$ fluorides, hydrocarbons. A drying agent. When heated to decomposition it emits toxic fumes of MgO and Cl-. See also MAGNESIUM COMPOUNDS and PERCHLORATES

Potential Exposure

Magnesium perchlorate is used as a drying agent for gases and as an oxidizing agent


UN1475 Magnesium perchlorate, Hazard Class: 5.1; Labels: 5.1-Oxidizer.

Purification Methods

Magnesium perchlorate (Anhydrone, Dehydrite) [10034-81-8 (anhydrous)] M 259.2, m >250o, pK2 5


A powerful oxidizer. Violent reaction with reducing agents; alkenes (above 220C), ammonia gas; organic matter; ethylene oxide, finely divided or powdered metals, combustible materials, phosphorus, dimethylsulfoxide, mineral acids; wet argon; hydrazines, alcohols, wet fluorobutane; butyl fluorides; organic materials. Forms explosive material with ethyl alcohol. Incompatible with many materials. Shock or heat may cause magnesium perchlorate to explode.

Magnesium perchlorate Preparation Products And Raw materials

Raw materials

Preparation Products

Magnesium perchlorate Suppliers

Global( 119)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32447 55
career henan chemical co
+86-371-86658258 CHINA 27142 58
Hubei Jusheng Technology Co.,Ltd.
027-59599243 CHINA 28236 58
Hubei xin bonus chemical co. LTD
027-59338440 CHINA 23049 58
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
86-10-82849933; China 96815 76
Meryer (Shanghai) Chemical Technology Co., Ltd. +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
+86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-88580358(Beijing) China 40269 62
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 China 30163 84
Energy Chemical 021-58432009 / 400-005-6266
021-58436166-800 China 44025 61
Beijing Ouhe Technology Co., Ltd +86-10-4006331231;+86-10-51280831;+86-10-82967028
+86-10-82967029 China 12495 60
JinYan Chemicals(ShangHai) Co.,Ltd. 13817811078,021-50426030
86-021-50426522,50426273 China 10011 60

View Lastest Price from Magnesium perchlorate manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2019-07-11 Magnesium perchlorate
US $1.00 / KG 1KG 99% 25kg career henan chemical co

Magnesium perchlorate Spectrum

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