What Is Magnesium Silicate?
Magnesium silicate, with a molecular weight of 100.3887, is relatively small in nature and can only occur in large amounts in the components of silicate minerals.
Chinese name: magnesium silicate
Chinese alias: polyether adsorbent; magnesium polysilicate; magnesium hexasilicate
English name: Magnesium silicate
English alias: Florisil; Florisil 60; FLORISIL ABSORBENT; Florisil (R); Magnesia-silica gel; Magnesium silicates; Silicic acid, magnesium salt; Magnesium hexasilicate; magnesium oxosilanediolate
Appearance and properties: white to off-white fine powder
Density: 3.21 g / cm 3
Melting point: 1890 ° C
Stability: Stable at normal temperatures and pressures.
Storage conditions: Store in a cool, dry place. Store in a tightly closed container. [1]
Customs code: 2839900090
WGK Germany:-
Danger category code: R36 / 37/38
Safety instructions: S24 / 25
RTECS number: VV7340000
Dangerous goods sign: Xi [2]
It is formed by the interaction of magnesium salt and soluble silicon. MgSiO 3 can be obtained by melting quartz and MgO in a furnace (using a Wanner pyrometer). [2]
It is mainly used in pharmacy and medicine as an antacid. It can neutralize gastric acid and protect ulcer surface. It is mainly used in stomach and
Composite magnesium silicate
Magnesium trisilicate is a hydrous magnesium silicate with an indefinite composition. Its molecular formula is 2MgO · 3SiO 2 · XH 2 O, which is generally crystallized into pentahydrate (X = 5). It contains MgO> 20% and SiO 2 > 45%. This product is a odorless, odorless, sand-free white powder. It is insoluble in water or ethanol, and is susceptible to decomposition by inorganic acids. It reacts with sulfuric acid to form magnesium sulfate and silicon dioxide. The latter is insoluble in water and acids, which can separate silicon and magnesium. It is slightly hygroscopic in exposed air.
Magnesium trisilicate is used as an antacid in medicine to neutralize gastric acid and protect the ulcer surface. It is mainly used to treat gastric and duodenal ulcers and hyperacidity. Can also be used as deodorant and decolorant, etc., also used in ceramics or rubber manufacturing.
It is usually a tablet in the pharmaceutical industry. It is a complex of magnesium oxide and silicon dioxide. It is insoluble in water and has a weak and slow antacid effect. It may not work if there is rapid gastric emptying, but it will last longer , Can be up to 4 ~ 5 h. The reaction formula is as follows:
2MgO · 3SiO 2 · XH 2 O + 4HCl = 2MgCl 2 + 3SiO 2 + (X + 2) H 2 O
It is used to treat ulcers, etc. The colloidal silica produced when neutralizing gastric acid can cover the surface of stomach and duodenal ulcers. The effect is slow, long-lasting, and does not produce gas. On the one hand, it can protect the gastric membrane, and on the other hand, it has an adsorption effect. It adsorbs free acid.
Food grade is used as anti-caking agent, filter aid, coating agent. According to FAO / WHO (1982), the maximum amount of anti-caking agent in powdered dairy products (milk powder, cream powder, high-fat milk powder, semi-cream powder) is 10g / kg. [2]
Pharmaceutical grade magnesium trisilicate
Indicator name | index | Indicator name | index |
Magnesium oxide (MgO) /% Silica (SiO2) /% SiO2: MgO Acid power
Free base chloride/% | 20.0 45.0 2.1 2.3 Compliance Compliance 0.05 | Sulfate /% Soluble salt Burning weight loss /% Heavy metal / 10 Arsenic salt /% | 0.5 Compliance 30.0 20 0.0005 |
Food Grade Magnesium Trisilicate
Indicator name | index | Indicator name | index |
Magnesium oxide (MgO) (based on ignition) Silicon oxide (SiO2) /% Loss on drying (105 , 2h) /% Loss on ignition (900 1000 , 2 20min, dry the latter as the sample) /% Fluorine / mg / kg | 15 67 15 15 10 | Free base (as NaOH) /% Soluble salts /% Arsenic salt (as As) (mg / kg) Lead (mg / kg) Heavy metals (as Pb) (Mg / kg) | 1 3 3 10 40 |
