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Talc

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Name Talc EINECS 238-877-9
CAS No. 14807-96-6 Density 2.7-2.8 g/cm3
Solubility Melting Point 800 °C
Formula H2Mg3O12Si4 Boiling Point
Molecular Weight 379.2657 Flash Point
Transport Information Appearance white to almost white micro fine powder
Safety 36 Risk Codes 20-37
Molecular Structure Molecular Structure of 14807-96-6 (Talc) Hazard Symbols HarmfulXn
Synonyms

Beaver White 200;Beaver White 325;CS 2 (talc);CT 8 (mineral);Emtal596;FVS;FW-XO;Fabi HTP Ultra 5C;Finntalc M 15;Finntalc M15E;Finntalc M 20SL;Finntalc M 30SL;HS-T 0.5;HST 05;HT 7000;HT 7050;HTP 05;HTP 1C;HTP Ultra 1C;HTP Ultra 5C;HTP-Ultra 10C;HTP-Ultra 5;HWST;HeliocoteX;Hi-Con Talc C 12;Hi-Filler;Hi-Filler 10;

 

Consensus Reports

IARC Cancer Review: Group 1 IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 ,1987,p. 349.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Human Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 42 ,1987,p. 185.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Reported in EPA Talc (CAS NO.14807-96-6) Inventory.

Standards and Recommendations

ACGIH TLV: Human Carcinogen; TWA >2 mg/m3, Respirable Dust

Specification

The Talc, with the CAS registry number 14807-96-6, is also known as Cosmetic talc; Magnesium silicate talc. It belongs to the product inorganic chemical industry. Its EINECS number is 238-877-9. What's more, its systematic name is Talc. And it is finely powdered native hydrous magnesium silicate. It is used as a dusting powder, either alone or with starch or boric acid, for medicinal and toilet preparations. It is also an excipient and filler for pills, tablets, and for dusting tablet molds. The Talc may cause damage to health. It is Harmful by inhalation, Irritating to the respiratory system. Whenever you will contact it, please wear suitable protective clothing.

Preparation of Talc: Talc is found chiefly in the metamorphic rocks, often those of a more basic type because of the alteration of the minerals mentioned above. Talc is primarily formed via hydration and carbonation of serpentine, via the following reaction,
2Mg3Si2O5(OH)4 + 3CO2 → Mg3Si4O10(OH)2 + 3 MgCO3 + 3 H2
Talc can also be made via a reaction between dolomite and silica, which is typical of skarnification of dolomites via silica-flooding in contact metamorphic aureoles,
3CaMg(CO3)2 + 4 SiO2 + H2O → Mg3Si4O10(OH)2 + 3 CaCO3 + 3 CO2

You can still convert the following datas into molecular structure:
(1)InChI:InChI=1S/3Mg.2HO3Si.2O3Si/c;;;4*1-4(2)3/h;;;2*1H;;/q3*+2;2*-1;2*-2;
(2)InChIKey:InChIKey=KNXVOGGZOFOROK-UHFFFAOYSA-N;
(3)Smiles:[Si](O)(=O)[O-].[Si]([O-])(O)=O.[Si](=O)([O-])[O-].[Si](=O)([O-])[O-].[Mg+2].[Mg+2].[Mg+2];

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