TALC

Synonym(s):BMPR3;BMPR-II;BMR2;BRK-3;PPH1

CAS NO.：13376-74-4
Empirical Formula: H2Mg3O12Si4
Molecular Weight: 379.27
MDL number: MFCD00792903
EINECS: 238-877-9
SAFETY DATA SHEET (SDS)
Update Date: 2024-02-18 17:28:16

What is TALC?

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.

The Uses of TALC

Chiefly as a ceramic insulator in electronic devices.

The Uses of TALC

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

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.

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.

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.

Properties of TALC

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 for TALC

Signal word	Danger
Pictogram(s)	Exclamation Mark Irritant GHS07 Health Hazard GHS08
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation
Precautionary Statement Codes	P202:Do not handle until all safety precautions have been read and understood. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P308+P313:IF exposed or concerned: Get medical advice/attention.