Name | Magnesium carbonate tetrahydrate |
Synonyms | Magnesium carbonate tetrahydrate MAGNESIUMCARBONATEBASIC,HEAVY,FCC MAGNESIUMCARBONATEBASIC,LIGHT,FCC magnesium carbonate hydrate, puratronic magnesium carbonate tetrahydrate, reagent grade |
CAS | 39409-82-0 |
EINECS | 609-673-0 |
InChI | InChI=1/CH2O3.2Mg.2H2O/c2-1(3)4;;;;/h(H2,2,3,4);;;2*1H2/q;2*+2;;/p-4 |
InChIKey | LMMTXHUCDIPKDU-UHFFFAOYSA-J |
Molecular Formula | CH6Mg2O5 |
Molar Mass | 146.66 |
Density | 2.16 |
Boling Point | 333.6°C at 760 mmHg |
Flash Point | 169.8°C |
Water Solubility | Soluble in water. Insoluble in ethanol. |
Vapor Presure | 2.58E-05mmHg at 25°C |
Appearance | Solid |
Color | White |
Merck | 14,5660 |
Storage Condition | 2-8°C |
Physical and Chemical Properties | This product is a white monoclinic crystal with a relative density of 2.254. Slightly soluble in water, soluble in dilute acid, acid foaming decomposition release carbon dioxide, heating and calcination of magnesium oxide and carbon dioxide. |
Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. |
WGK Germany | 3 |
RTECS | FG1797000 |
TSCA | Yes |
HS Code | 28369910 |
due to the different conditions of crystallization, the product is divided into light and heavy, generally light. Including: light weight Mg-C03-H20. Heavy 5mg c03-mg (OH)2-3HzO, 5mg c03-2mg (OH)z.7H20,4mg c03.mg (OH) and 3mg OI-D2.42O Mg (OH). At room temperature for three water salt. Light weight is white friable block or loose white powder. Odorless. The relative density was 2.2. Melting point 350 °c. Stable in air. Heated to 700 ° C decomposition of carbon dioxide, magnesium oxide. Practically insoluble in water, but in water causes a light alkaline reaction. Insoluble in ethanol, can be dissolved in dilute acid and foam.
magnesium oxide was obtained by mixing magnesite (MgC03) with coke and then roasting, and CO2 was introduced into the solution to obtain magnesium bicarbonate. After filtration, the filtrate was heated to obtain a basic carbonate precipitate. Alternatively, dolomite (mgco3. cac03) is used as a raw material, and is obtained by processing and refining. Alternatively, an equal amount of crystalline magnesium sulfate and crystalline sodium carbonate may be dissolved in water, heated until sufficiently mixed to produce a precipitate while producing CO2 gas, filtered to remove the precipitate, and the resulting precipitate may be purified.
flour treatment agent, pectin base agent, alkaline agent, desiccant, color fixative, anti-caking agent, leavening agent and acidity regulator. Can be used for table salt, sugar, acidified cream, milk, ice cream, biscuits. China's provisions can be used as flour treatment agent, the maximum use of 5. og/kg; In wheat flour, the maximum use of 11 5g/kg (flour).