TALC Chemical Properties

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℃）

Safety Information

Hazard Codes 

Xn,T

Risk Statements 

20-37-61

Safety Statements 

36-45-53

WGK Germany 

-

RTECS 

WW2710000

TSCA 

Yes

IDLA

3,000 mg/m3

MSDS

• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

TALC Usage And Synthesis

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.

Uses

Chiefly as a ceramic insulator in electronic devices.

Uses

Pigment in paint, varnishes; filler for paper, rubber, soap; lubricating molds and machinery; heat insulator.

Definition

An extremely soft greenish or white mineral, a hydrous silicate of magnesium. Purified it is sold as talcum powder, and it is used as a lubricant, a filler (in paint and rubber) and an ingredient of some ceramics.

Definition

A white or pale-green mineralform of magnesium silicate,Mg₃Si₄O₁₀(OH)₂, crystallizing in thetriclinic system. It forms as a secondarymineral by alteration of magnesium-rich olivines, pyroxenes, andamphiboles of ultrabasic rocks. It issoaplike to touch and very soft, havinga hardness of 1 on the Mohs’scale. Massive fine-grained talc isknown as soapstone or steatite. Talcin powdered form is used as a lubricant,as a filler in paper, paints, andrubber, and in cosmetics, ceramics,and French chalk. It occurs chie?y inthe USA, Russia, France, and Japan.

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.

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.

TALC(13376-74-4)Related Product Information

• LICHROSORB(R) RP8
• Magnesium oxide
• TALC
• Talc
• Magnesium trisilicate
• SILICA
• HYDROTALCITE
• MAGNESIUM SILICATE (TALC)
• Hydrotalcite
• tetrahydroxysilane
• Talc Bp pruified Bp
• taclum powder Food grade
• TREMOLITIC TALC
• SODA TALC
• 1-Propanamine, 3-(triethoxysilyl)-, reaction products with talc (Mg3H2(SiO3)4)
• Purified talc
• TALC POWDERED, PURE PH. EUR.,USP
• Antimony oxide (Sb2O3), reaction products with talc