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Aluminium Stearate
- Origin
- : China
- CAS Number
- : 0637-12-7
- HS Code
- : 2915.70.90
Basic Info
- IUPAC Name
- : aluminium tristearate
- Molecular Formula
- : C54H105AlO6
- Molecular Weight (g/mol)
- : 877.3100
- Synonyms & Trade Names
- : Aluminium stearate; Aluminium tristearate
- Purity / Assay (%)
- : 95% min
- Grade / Quality Level
- : Technical Grade
- Physical Form
- : Solid
- Concentration
- : Pure substance
- Appearance / Color
- : White to off-white solid
- Odor
- : Faint fatty
- Melting Point (°C)
- : 117.0000
- Density (g/cm³)
- : 1.0700
- Solubility in Water
- : Insoluble in water
- UN Number
- : Not applicable
- H-Statements
- : None
- P-Statements
- : P260
- REACH Status
- : Registered
- Drug Precursor Status
- : Non-precursor
- Storage Class (GHS)
- : 13
- Storage Conditions
- : Cool, dry place
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About Aluminium Stearate
Aluminium stearate (aluminum tristearate) is a white coloured powder, wax-like powder (metallic soap) that dissolves well in vegetable oils upon heating. It is soluble in glycol, alkali, BTX, chlorinated hydrocarbons. If aluminium stearate is in high concentration, gelling can be seen upon cooling. It exhibits the following properties: good gelling and thickening action, excellent water repellence, transparency and a synergistic effect with zinc stearate or calcium stearate. Aluminium stearate exhibits a relatively high solubility in hydrocarbon solvents (such as mineral spirits) when compared to other metallic stearates. It is insoluble in water, alcohol and ether; but when hot, it is readily soluble in benzene, acids and common solvents.
Manufacturing process
Aluminium stearate is synthesised via the precipitation process using high quality stearic acid. This is done by adding aluminium isopropoxide to stearic acid in anhydrous pyridine, inducing the precipitation of the pyridine complex. Pyridine is then removed under vacuum to give the aluminium stearate.
