Supreme Perlite Company - The Northwest's Leading Manufacturer of Perlite Products.

Color		White
Refractive Index		1.5
Free Moisture (max.)		5%
pH (of water slurry)		6.5-8.0
Specific Gravity		2.2-2.4
Softening Point		1600-2000°F
Fusion Point		2300-2450°F
Specific Heat		0.2 Btu/lb.°F
Thermal Conductivity @ 75°F		.27 - .41 Btu.in/h.ft2.°F
Bulk Density		2-10 lbs./cu. ft.
Mesh Size		4 mesh & finer
Solubility		in hot concentrated alkali & HF Moderately (<10%) in 1N NaOH Slightly (<3%) in mineral acid Very Slightly (<1%) in water & mineral acids