CAS 1305-62-0: Calcium Hydroxide (Ca(OH)2)

Identity

CAS Number1305-62-0
Molecular FormulaCa(OH)2
IUPAC Namecalcium dihydroxide
Molecular Weight74.09 g/mol
SMILES[Ca+2].[OH-].[OH-]
Synonymsslaked lime, hydrated lime, caustic lime, lime water

2D Structure

Physical Properties

Density2.21 g/mL at 25°C
Boiling Point2850.0°C
Melting Point580.0°C
Flash PointNone°C
Vapor Pressure0.0 kPa at 20°C
Refractive IndexnD = 1.574
Dielectric Constantε = 11.8

Safety & GHS Classification

Irritant

Storage: Store in dry, airtight containers — absorbs CO2 from air forming calcium carbonate. Low solubility in water. Dust irritant — use dust mask when handling powder.

Material Compatibility Matrix

Plastics

MaterialRating
PTFEExcellent
PVCGood
PEGood
PPExcellent
PEEKExcellent
PVDFExcellent

Rubbers

MaterialRating
VitonGood
NBRGood
EPDMExcellent
SiliconeGood
FKMGood

Metals

MaterialRating
Stainless 316Excellent
AluminumGood
CopperGood
BrassGood

Applications

External References: PubChem

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