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Home > Main Index > Expanded Perlite Product Data > Typical Physical Characteristics

Typical Physical Characteristics of Perlite

Color: White
G.E. Brightness %: 70-80
Refractive Index: 1.47
Specific Gravity: 2.2-2.4
Apparent Density: 2.5-10.5 lb/ft3 or 40-170 KG/M3
Wet Density: 5-20 lb/ft3 or 80-320 kg/m3
pH: neutral
MOHS Hardness: 5.5
Water Adsorption: 200-600 % by weight
Oil Adsorption: 50-100 grms oil/gms of perlite
Softening Point: 1800 F or 980 C
Moisture %: lessthan 1.0 %
Ignition Loss (3 hr 1700 F): 1.5% maximum
Particle Size (mesh range): 20-200 U.S. Standard

Information given herein is from sources considered reliable, but no guarantee of accuracy can be made or liability assumed.  Your supplier may be able to provide you with more precise data.  Certain compositions or processes involving perlite may be the subject of patents.
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