Quick Search
CAS: 1343-88-0
MDL Number: MFCD00078249
EC No.: 215-681-1
Molecular Weight: 100.39
Molecular Formula: MgO3Si
IUPAC Name: magnesium;oxygen(2-);silicon(4+)
DESCRIPTION
Magnesium silicates are white, odorless, finely divided powders formed by the precipitation reaction of water-soluble sodium silicate (water glass) and a water-soluble magnesium salt such as magnesium chloride, magnesium nitrate or magnesium sulfate.
The composition of the precipitate depends on the ratio of the components in the reaction medium, the addition of the correcting substances, and the way in which they are precipitated.
The molecular formula is typically written as MgO:XSiO2, where X denotes the average mole ratio of SiO2 to MgO.
The product is hydrated and the formula is sometimes written MgO:XSiO2•H2O to show the water of hydration.
Magnesium silicate is a mineral that can be utilized to clean biodiesel in a waterless procedure.
Moreover, Magnesium silicate is widely used to remove free fatty acids and other polar compounds from used cooking oils to extend their life.
Magnesium silicate can also be used to purify biodiesel by adsorbing free glycerin, soaps, methanol as well as monoglycerides and sterol glucosides.
Magnesium silicate is a compound of magnesium oxide and silicon.
Magnesium silicate is the magnesium salt of silicic acid containing an unspecified amount of water.
The molecular formula of Magnesium silicate can be expressed more clearly as MgSiO3.xH2O.
Magnesium silicate is known as talc and it presents many uses in the cosmetic industry, food industry and pharmaceutical industry.
Under the FDA, magnesium silicate is determined as a member of the substances generally recognized as safe (GRAS) to be used as an anticaking agent.
Magnesium Silicate is generally immediately available in most volumes, including bulk quantities.
Ultra high purity and high purity forms also include metal powder, submicron powder and nanomaterials, targets for thin film deposition, and pellets for chemical vapor deposition (CVD) and physical vapor deposition (PVD) applications.
Magnesium silicate is an inorganic compound used as an ingredient in product formulations for many different purposes.
Since its compatibility with other components is critical for product quality and stability, it is essential to characterize the integrity of magnesium silicate in different solutions used for formulations.
Magnesium Silicate is a white powder, 3MgSiO3⋅5H2O, with variable hydration, insoluble in water or alcohol, used as a rubber filler, a bleaching agent, an odor absorbent, and in the manufacture of paints and resins.
Magnesium Silicate is any silicate containing magnesium, as enstatite, talc, or magnesium trisilicate.
APPLICATIONS
Synthetic magnesium silicates have broad applications in industry and are used extensively in pharmaceuticals, cosmetics, biodiesel purification, and chromatography.
Laponite, a commercially available synthetic magnesium silicate, is used widely as a rheological modifier and filler for cosmetics and pharmaceuticals and has also been studied for its potential in biomedical applications, including 3D bioprinting and tissue regeneration.
In these fields, synthetic magnesium silicates also have potential in applications where natural magnesium silicates are used, including active ingredients or excipients for oral and topical pharmaceuticals and cosmetics.
The synthetic magnesium silicate, is used broadly in the biodiesel industry due to its adsorptive properties.
The active sites formed from the free silonal groups on the surface of magnesium silicate make it an excellent adsorbent resulting in extensive studies on its use as an adsorbent, especially for used oils and wastewater treatment.
Magnesium silicate (MgSiO3) when hydrated is most commonly known as "talc".
In the pharmaceutical industry Magnesium silicate is used as an anticaking agent to improve powder flow in tablet compression.
Magnesium silicate is used cosmetically in talcum and baby powder as an adsorbent.
Talc or Magnesium silicate has been reported to be used in some food products, and is generally recognized as safe by the FDA.
The very large active surface makes synthetic magnesium silicate useful for a wide variety of applications: purifying adsorbent (polyols, animal and vegetable oils, chromatography,dry cleaning, sugar, resins, odors); filler (rubber, ceramics, paper, glass, refractories); anti-caking agent (salt); catalyst; catalyst carrier; filter medium.
When used as a food additive, it is safe to ingest synthetic magnesium silicate.
In 1990, the safety of synthetic magnesium silicate was reviewed by the Scientific Committee on Food (SCF) together with that of silica and the other metal alkali silicates.
The SCF noted that “the available data, including a number of short-term studies in two species, appear to substantiate the biological inertness of those compounds”.
The SCF established a group Acceptable Daily Intake (ADI) not specified for silicon dioxide and the alkali metal silicates.
Magnesium silicate is used to absorb moisture, prevent caking, and to improve the feel of a product.
In the pharmaceutical companies, Magnesium silicate is used as a dietary supplement, as part of the formulation ingredients in drug production, in antacid and antiulcer preparations, as a component of antiepileptic drugs, in antifungal topical agents and in the treatment of acne and as a facial moisturizer.
When complexed with arginine, magnesium silicate can be used as an antiatherosclerotic agent and to promote bone and cartilage formation in mammals.
Orally administered magnesium silicate is rapidly neutralized in the stomach and it forms magnesium chloride and silicon dioxide.
From the modified portion, some of the formed magnesium is absorbed.
The very low absorption of magnesium silicate makes its pharmacokinetic properties not relevant.
Natural Magnesium silicate contains asbestos, a substance that may lead to lung cancer.
However, talcum (Magnesium silicate) products used in cosmetics have been free of asbestos since the 1970s.
Some studies have reported small increases in ovarian cancer with the use of asbestos-free talcum powder, but studies are conflicting and the results are not definitive.
The American Cancer Society suggests corn starch-based cosmetics might be an alternative in those concerned about Magnesium silicate use.
The U.S. Food Chemicals Codex, JECFA, and other monographs for Food Grade synthetic magnesium silicate specify a mole ratio of 2MgO:5SiO2 (or X=2.5 in the general formula).
The most common use for Food Grade synthetic magnesium silicate is as an active filter aid for adsorption of color, free fatty acids and other polar compounds from used frying oils.
Various national and international regulations allow use of this material as an anti-caking agent in a wide variety of powdered foods.
This mineral rock, Magnesium silicate is mined in many parts of the world.
The crystal form and resultant physical characteristics vary with the location of the rock.
Normally Magnesium silicate rock contains a mixture of types.
The paint-making properties of a particular commercial Magnesium silicate pigment are governed by the type of structure or mixture of types, the average particle size and the particle size distribution.
Since most grades of Magnesium silicate are predominantly fibrous or platy, it is common practice to classify them on this basis.
Fibrous Magnesium silicates are usually rated best for exterior durability and pigment suspension with some deficiency in flowing and smoothness of film.
PROPERTIES
Unlike natural magnesium silicates like talc and forsterite olivine which are crystalline, synthetic magnesium silicates are amorphous.
Synthetic magnesium silicates are insoluble in water or alcohol.
The particles are usually porous, and the BET surface area can range from less than 100 m2/g to several hundred m2/g.
TOXICITY
The administration of more than 50 meq of magnesium daily can produce the development of hypermagnesemia.
This can provoke the formation of bladder and renal calculi.
There is no known toxicity and the LD50 in animals are higher than 500 mg/kg in humans.
It is determined that magnesium silicate is not carcinogenic.
HANDLING AND STORAGE
Handle Magnesium silicate in an enclosed, controlled process.
Avoid creating dust.
Provide adequate ventilation if dusts are created.
Avoid breathing dust or fumes.
Avoid contact of Magnesium silicate with skin and eyes.
Wash thoroughly before eating or smoking.
Conditions for Safe Storage, Including Any Incompatibilities:
Store Magnesium silicate in tightly sealed containers.
Store Magnesium silicate in a cool, dry, well-ventilated area.
Protect from moisture.
SYNONYMS
Ambosol
Magsorbent
Avibest
Britesorb
Gastomag
Activated magnesium silicate
Silicic acid, magnesium salt
magnesium dioxido(oxo)silane
Silica without Fluorescence
Magnesium metasilicate
forsterite (Mg2SiO4)
