Magnesium aluminum silicate
Synonyms
Silicic acid, aluminum magnesium salt;
Silicic acid (H4SiO4), aluminum magnesium salt (2:2:1);
Category
Polymer Surfactant
> Inorganic Polymer
Chemical Numbering System
CAS: 12511-31-8 / 1327-43-1
EINECS: 235-682-0 / 215-478-8
Molecular Formula & Molecular Weight
Molecular Formula: N/A
Molecular Weight: N/A
Structure
Properties
Appearance (1), white to yellow-brown solid.
Solubility insoluble in water.
Stability stable.
Risk Solid form: irritation, irritation to skin, eye, respiratory system.
GHS label: 
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent dispersing, emulsifying, absorbing, suspending abilities. Can be form gel.
Synthesis
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
90.0 |
Test Methods
(1), Actives
2, Hazardous substances indexes
|
Item |
Hazardous substances indexes |
|
Solid |
|
|
Heavy metals (as Pb), mg/kg, ≤ |
20 |
|
As, mg/kg, ≤ |
3 |
Test Methods
(1), Heavy metals (as Pb)
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30799 The test method of food detergents -- Determination of heavy metals
(2), As
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30797 The test method of food detergents -- Determination of total arsenic
3, Product standards
(1), Chinese standards
(1a), YY 0240 Pharmaceutical excipients -- Magnesium aluminum silicate
(1b), Chinese Pharmacopoeia (2020 Edition) Aluminium Magnesium Silicate
4, Further explanation
(a), On physical and chemical indexes: firstly, shall be indicated carbon atom distribution; secondly, shall be indicated average molecular weight.
(b), Used in cosmetics, should be test for harmful substances or furtherly test for microorganisms, according to local regulations and standards.
Major Uses
1, Typical applications
Use as dispersing agent, emulsifying agent.
Use as thickening agent.
Use as suspending agent.
Use as gel-forming agent.
2, Personal care products
Absorbent, anti-caking agent, viscosity controlling agent, opacifier in personal care products.
3, Paper-making
Sizing agent in paper-making industry.
4, Medicine
Pharmaceutical excipient, use as suspending agent, adsorbent. (This section is for reference only, should be implemented according to local Pharmacopoeia.)
Manufacturers
Update: 20140820(1); 20200725(2);