13717-00-5 Usage
Description
Magnesium carbonate, with the molecular formula MgCO3 and a molecular weight of 84.3145 g/mol, is a light, bulky white powder that is very slightly soluble in water. It is found in nature as several hydrated, basic, and double salts, with the principal minerals being magnesite (MgCO3) and dolomite (CaCO3·MgCO3). The term "magnesium carbonate" is generally reserved for the synthetic, pure variety, while the naturally occurring material is called magnesite. Magnesium carbonate loses CO2 even on gentle heating and is noncombustible.
Uses
Used in Food Industry:
Magnesium carbonate is used as an anticaking agent and general-purpose food additive. It is practically insoluble in water but is more soluble in water containing carbon dioxide. It imparts a slightly alkaline reaction to the water and is used as an alkali in sour cream, butter, and canned peas. It assists in providing clarity in algin gels and functions as a filler in dental impression materials.
Used in Pharmaceutical Industry:
Magnesium carbonate is used in the production of magnesium citrate and as a desiccant to keep hygroscopic products from caking. It is also used as an antacid in medicine.
Used in Chemical Industry:
Magnesium carbonate is used as a starting material for producing a number of magnesium compounds, such as magnesium salts, heat insulation, and refractory materials.
Used in Rubber Industry:
Magnesium carbonate serves as a reinforcing agent in neoprene rubber, strengthening the rubber and improving its properties.
Used in Inks and Glass Industry:
It is used in the production of inks, dyes, and cosmetics, contributing to their color retention and quality.
Used in Cosmetics:
Magnesium carbonate is used in cosmetics, such as dusting powder and toothpaste, for its drying and color retention properties.
Used in Other Applications:
Magnesium carbonate is also used in flooring, fireproofing and fire-extinguishing compositions, as a filler material and smoke suppressant in plastics, and as an additive to table salt.
Preparation
Magnesium carbonate is obtained mainly by mining its natural mineral magnesite. The trihydrate salt, MgCO3?3H2O, is prepared by mixing solutions of magnesium and carbonate ions in the presence of carbon dioxide. Alternatively, it may be produced by carbonation of a magnesium hydroxide slurry with carbon dioxide under pressure (3.5 to 5 atm) and at a temperature below 50°C which yields soluble magnesium bicarbonate:
Mg(OH)2 + 2CO2 → Mg(HCO3)2
The solution is filtered to remove impurities and the filtrate is subjected to vacuum or aeration to yield insoluble magnesium carbonate as a hydrated salt:
Mg2 + 2HCO3ˉ → MgCO3 + CO2 + H2O
Under ordinary conditions, anhydrous magnesium carbonate cannot be prepared in aqueous systems. The anhydrous salt, however, can be made under very high partial pressures of carbon dioxide.
Basic magnesium carbonate occurs in nature as the mineral hydromagnesite. The basic salt is obtained by mining the ore followed by purification. The basic carbonates also can be made by drying the magnesium carbonate trihydrate at about 100°C. Alternatively it can be prepared by simply boiling a solution of magnesium bicarbonate. The bicarbonate is obtained by carbonation of a magnesium hydroxide slurry below 50°C and under a CO2 partial pressure of 3.5 to 5 atm. Composition of the basic carbonate produced by the above methods is 4MgCO3 ?Mg(OH)2?4H2O.
Another basic salt, MgCO3?Mg(OH)3?3H2O is precipitated when magnesium salt solution is treated with sodium carbonate solution. The reactions probably are:
CO32– + H2O → HCO3ˉ + OHˉ
2Mg2+ + CO32– + 2OHˉ → MgCO3?Mg(OH)2
Check Digit Verification of cas no
The CAS Registry Mumber 13717-00-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,7,1 and 7 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 13717-00:
(7*1)+(6*3)+(5*7)+(4*1)+(3*7)+(2*0)+(1*0)=85
85 % 10 = 5
So 13717-00-5 is a valid CAS Registry Number.
InChI:InChI=1/CH2O3.Mg/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2
