| Identification | Back Directory | [Name]
TALC | [CAS]
13376-74-4 | [Synonyms]
TALC
Talk
BMR2
PPH1
BRK-3
BMPR3
TALCUM
STEATITE
FLJ41585
FLJ76945
SOAPSTONE
ASBESTINE
VANTALC 6H
CHALK FRENCH
FRENCH CHALK
VANTALC F 2003
TALCUM VENETUM
Mahnesium Silicate
HYDROUS MAGNESIUM SILICATE
MAGNESIUM SILICATE, HYDROUS
MAGNESIUM SILICALE, HYDROUS
MAGNESIUM SILICATE HYDRATE, HEAVY
MAGNESIUM SILICATE HYDRATE, LIGHT
BMPR2 (174-end), active, His tagged human | [EINECS(EC#)]
238-877-9 | [Molecular Formula]
H2Mg3O12Si4 | [MDL Number]
MFCD00792903 | [MOL File]
13376-74-4.mol | [Molecular Weight]
379.27 |
| Chemical Properties | Back Directory | [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. |
| Hazard Information | Back Directory | [Chemical Properties]
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. | [Hazard]
Toxic by inhalation. Effects pulmonary
function and causes pulmonary fibrosis. Questionable
carcinogen. | [Health Hazard]
The fibrous talc in soapstone
dust causes fibrotic pneumoconiosis; an increased
incidence of cancer of the lungs and
pleura has been reported. | [Industrial uses]
Steatites are noted for their excellent electricalproperties and low cost. They are easily formedand fired at relatively low temperatures. However,compositions containing little or no clayor plastic material present fabricating problemsbecause of a narrow firing range. Steatite partsare vacuum-tight, can be readily bonded toother materials, and can be glazed or ground tohigh-quality surfaces. |
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