Salts & Minerals
REACH
Aluminum tristearate
CAS Number
637-12-7
EC Number
211-279-5
What is Aluminum tristearate?
Aluminum tristearate (CAS 637-12-7), also sold as aluminium stearate, is a metallic soap formed from aluminum and stearic acid.
Where is Aluminum tristearate used?
- Paints and coatings: thickens solvent-based formulations and prevents pigment settling
- Plastics processing: internal and external lubricant reducing friction during extrusion and molding
- Grease and lubricant manufacturing: builds gel structure in hydrocarbon-based systems, controlling consistency and thermal resistance
- Personal care: incorporated into stick products, pressed powders, and anhydrous creams
- It modifies flow behavior in non-aqueous systems and improves surface release in processing.
Commercial specifications
- Technical and industrial grades; purity and metal content specifications vary by application
- Lubricant and coatings grades most commonly stocked
- Packaging from 25 kg bags to bulk quantities
Other Names (Synonyms)
Aluminium tristearate|Aluminium stearate|Aluminum tris(octadecanoate)|Aluminum stearate
What are the physical properties of Aluminum tristearate?
Melting Point 118 °C
Boiling Point 250°C[at 101 325 Pa]
Density 1.070 g/cm³
Appearance solid
Color white
Form powder
Water Solubility Soluble in alkali, glycol, chlorinated hydrocarbons, petroleum, benzene, turpentine oil, mineral oil, vegetable oil, mixture of benzene, toluene and the three xylene isomers. Insoluble in water, ethanol and ether.
Vapor Pressure 0Pa at 25℃
Log P 22.69
Which trade and regulatory codes apply to Aluminum tristearate?
WGK (Germany) 3