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Aluminum hydroxide CAS#21645-51-2

Aluminum hydroxide CAS#21645-51-2

Basic Information

Amphoteric Chemical Reactivity:Exhibits both acidic and basic properties, allowing it to react with acids and alkalis for versatile chemical applications.


High-Purity Solid Form:White, stable solid with consistent composition, suitable for controlled industrial and laboratory use.


Precursor to Aluminum Oxide:Can be thermally converted into aluminum oxide, making it valuable for alumina production processes. 


Good Chemical Stability and Safety: Insoluble in water and stable under normal conditions, enabling safe handling and storage.


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product description

Product Description of Aluminum hydroxide CAS#21645-51-2

Aluminum hydroxide, with the chemical formula Al(OH)₃, is a white solid that is insoluble in water but soluble in both acids and alkalis, exhibiting typical amphoteric behavior. When heated and dehydrated in air, it can be converted into aluminum oxide, making it an important precursor for alumina production. It reacts with acids to form salts and water, and with strong bases to produce corresponding salts and water, further demonstrating its amphoteric nature. Due to its slight acidity, it is also sometimes referred to as aluminic acid (H₃AlO₃).


Product Applications of Aluminum hydroxide CAS#21645-51-2
Aluminum hydroxide is a versatile industrial material used as an absorbent, desiccant, filler, flame retardant, and catalyst support. Its applications include pharmaceuticals (antacid), chromatography, dyeing, and the production of glass, ceramics, cosmetics, and various aluminum compounds.


Product Information

Parameters


Melting point300℃
Boiling point2980℃[at 101 325 Pa]
bulk density~90g/100 mL
density2.42 g/cm3 at 20 °C
vapor pressure<0.1 hPa (20 °C)
refractive indexAverage refractive index: 1.57-1.59
storage temp.Store at +5°C to +30°C.
solubility0.0015g/l
formcolloidal suspension
Specific Gravity2.42
colorWhite
PH8-9 (100g/l, H2O, 20℃)(slurry)
OdorOdorless
PH Range>7
Water Solubilityinsoluble
Crystal StructureMonoclinic
Merck14342
Solubility Product Constant (Ksp)pKsp: 32.89
Exposure limitsACGIH: TWA 1 mg/m3
Dielectric constant2.2(Ambient)
Stability:Stable. Incompatible with strong bases.
LogP-1.380 (est)
CAS DataBase Reference21645-51-2(CAS DataBase Reference)
EPA Substance Registry SystemAluminum hydroxide (21645-51-2)

 

Safety Information


Hazard CodesXi
Risk Statements36
Safety Statements26-36
WGK Germany-
RTECSBD0940000
TSCAYes
HS Code28183000
Hazardous Substances Data21645-51-2(Hazardous Substances Data)
ToxicityTDLo oral in child: 79gm/kg/2Y-I


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