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13376-74-4

Name TALC
CAS 13376-74-4
EINECS(EC#) 238-877-9
Molecular Formula H2Mg3O12Si4
MDL Number MFCD00792903
Molecular Weight 379.27
MOL File 13376-74-4.mol
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Chemical Properties

Definition A natural hydrous magnesium silicate. Compact, massive varieties may be called steatite in distinction from the foliated varieties, which are called talc. Soapstone is an impure variety of steatite.
Appearance White, apple-green, gray powder; pearly or greasy luster, greasy feel. Mohs hardness 1–1.5 (may be harder when impure), high resistance to acids, alkalies, and heat.
Melting point  800 °C
density  2,7 g/cm3
refractive index  1.54-1.59
storage temp.  -70°C
form  Talclike material of varying composition, but generally grayish-white, fine, odorless power. It is noncombustible and insoluble in water.
Dielectric constant 5.5 - 7.5（0.0℃）
Uses
Chiefly as a ceramic insulator in electronic devices.

Safety Data

Hazard Codes  Xn,T
Risk Statements 
Safety Statements 
WGK Germany  -
RTECS  WW2710000
TSCA  Yes
IDLA 3,000 mg/m3

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