Facts about Perlite

Chemical composition

Loss of ignition2,50%
SiO274,86%
AL2O312,58%
TiO20,06%
Fe2O30,70%
CaO0,75%
MgO0,26%
Na2O33,40%
K2O4,78%

Physical properties of expanded Europerl Perlite

ColourWhite
Free water0,5%
PH (in aqueous solution)6,5 – 8,0
Density2200 – 2400 kg/m3
Loose bulk density40 – 100 kg/m3
Particle size0 – 6 mm
Softening temperature1100°C
Melting point1350°C
Specific heat837 J/kg °K
Thermal Conductivityλ 10 38 mW/m°C
λ D class 42 mW/m°C

Solubility: Soluble in hot concentrated alkali or HF.
Moderately soluble (<10%) in 1 N NaOH.
Partially soluble (<3%) in acid (1N)
Very little soluble (<1%) in water and weak acids.