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Silicates, borates and other salts

Talc

Also known as Steritalc, Huashifen, Pulvis talci

CAS 14807-96-6Formula H2Mg3O12Si4Molar mass 379.26 g/molEC 238-877-9
90 suppliers listed Drug substance
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Talc chemical structure, H2Mg3O12Si4, CAS 14807-96-6
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
White to grayish-white, very fine crystalline powder
Melting point
900 to 1000
Density
2.7 g/cm³
Solubility
Insol in water, cold acids or in alkalies
HS code
283990
Category
Silicates, borates and other salts
Illustrative photo, off-white crystalline powder in an HDPE jar on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Talc?

Plain description, key identifiers and synonyms

Talc is finely-powdered native hydrous magnesium silicate. When administered into the pleural space, talc initiates an inflammatory reaction, resulting in adhesion of the visceral pleura to the parietal pleura and fibrosis, thereby effectively closing the pleural space and preventing further accumulation of fluid. This agent exhibits no intrinsic antineoplastic activity. (NCI04)

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
trimagnesium, 1,3,5,7-tetraoxido-2,4,6,8,9,10-hexaoxa-1,3,5,7-tetrasilatricyclo[3.3.1.13,7]decane, dihydroxide
CAS number
14807-96-6
EC number
238-877-9
Molecular formula
H2Mg3O12Si4
UNII
7SEV7J4R1U
INCI name
TALC
InChIKey
QLQXSZZVUVMFHZ-UHFFFAOYSA-L
InChI
InChI=1S/3Mg.O10Si4.2H2O/c;;;1-11-5-12(2)8-13(3,6-11)10-14(4,7-11)9-12;;/h;;;;2*1H2/q3*+2;-4;;/p-2
SMILES (canonical and isomeric)
[OH-].[OH-].[O-][Si]12O[Si]3(O[Si](O1)(O[Si](O2)(O3)[O-])[O-])[O-].[Mg+2].[Mg+2].[Mg+2]

Synonyms

  • Steritalc
  • Huashifen
  • Pulvis talci
  • Talc powder
  • INS NO.553(III)
  • INS-553(III)
  • E-553(III)
  • Potstone
  • Sterile Talc
  • Steritalc 2g
  • Steritalc 3g
  • Steritalc 4g
  • Health Smart Baby
  • Wart Remover Patch
  • Natures Choice Baby
  • Sterile Talc Powder
  • Talc (JP17/USP)
  • Nekvnro Wart Remover Patch
  • Talc (containing asbestos)
  • Sclerosol Intrapleural Aerosol
  • Talc (silica and fibre free)
  • Talc (not containing asbestos)
  • Talc (not containing asbestos fibers)
  • Talc (containing no asbestos and less than 1% quartz)
  • Agalite
Show all 39 synonyms
  • Asbestine
  • Desertalc 57
  • Emtal 596
  • Fibrene C 400
  • French chalk
  • Hydrous magnesium silicate
  • Mistron 2SC
  • Mistron frost P
  • Mistron RCS
  • Mistron Star
  • Mistron super frost
  • Mistron vapor
  • MP 12-50
  • MP 25-38

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
White to grayish-white, very fine crystalline powderexp.
Odour
Odorless.exp.
Taste
Tastelessexp.
Melting point
900 to 1000exp.
Density
2.7 g/cm³exp.
Solubility
Insol in water, cold acids or in alkaliesexp.
Vapour pressure
0 mmHg at 68 °F Essentiallyexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
379.26 g/molcalc.
Exact mass
377.8175 Dacalc.
LogP (octanol/water)
-8.19calc.
Topological polar surface area
207.6 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
12calc.
Rotatable bonds
0calc.
Heavy atoms
19calc.
Rings
4calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
6calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O1[SiH]2O[SiH]3O[SiH]1O[SiH](O2)O3

O1[SiH]2O[SiH]3O[SiH]1O[SiH](O2)O3

4 rings, 10 atoms.

2 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS classification
Hazard pictograms

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Talc suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 90 suppliers
30 of 30 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

90 suppliers in 15 countries

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Talc price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Additive to clay in ceramic manufacture and paper coatings, for roofing materials.

Carrier and diluent for insecticides, filler and pigment for paints and elastomers, additive in manufacture of refractories.

Ceramics, cosmetics and pharmaceuticals, filler in rubber, paints, putty, plaster, oilcloth, abherent, slate pencils and crayons.

Dusting powder, either alone or with starch or boric acid, for medicinal and toilet preparations, excipient and filler for pills, tablets and for dusting tablet molds, clarifying liquids by filtration.

Read more

As pigment in paints, varnishes, rubber, filler for paper, rubber, soap, in fireproof and cold-water paints for wood, metal and stone, lubricating molds and machinery, glove and shoe powder, electric and heat insulator.

VET: Topically on vulva fold pyodermas of dogs as protectant.

Industrial uses: Processing aids not otherwise specified, Wrinkle resisting agent, Abrasives, Opacifer, Antioxidant, Anti-adhesive/cohesive, Binder, Other.

Consumer uses: Fixing agent (mordant), Soil amendments (fertilizers), Viscosity modifiers, Thickening agent, Crystal growth modifiers (nucleating agents), Filler, Sealant (barrier).

Use classes: Cosmetics.

Cosmetic ingredient, INCI name TALC(abrasive, absorbent, anticaking, bulking)

Pharmacological actions

  • Antiperspirants

Functional uses

  • Abrasive
  • Absorbent
  • Anti-adhesive/cohesive
  • Anti-caking agent
  • Filler
  • Flow promoter
  • Humectant
  • Opacifer
  • Pigment
  • Processing aids not otherwise specified
  • Softener and conditioner
  • Thickening agent

Cosmetic functions

  • Abrasive
  • Absorbent
  • Anticaking
  • Bulking
  • Opacifying
  • Skin protecting
  • Slip modifier

How it is made

Open pit or underground mining of natural talc and processing by crushing, washing, drying, and milling

Variable amount of other mineral substances... are separated from... (talc) by mechanical means, such as flotation or elutriation. Talc is then finely powdered, treated with boiling dilute HCl, washed well, and dried.

Depending on the geology and minability of the deposits, talc is extracted either by open-pit mining after removal of the overburden rock layers or by underground mining. ... The processing of talc depends on the type of deposit.

Read more

Commonly, the first step is selective mining, followed by floatation to separate the talc from other minerals (eg, silicates and carbonates such as magnesite). Finally, the higher grades of talc are subjected to highly developed beneficiation processes (eg, fine grinding, air classification).

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • EU Cosmetics Regulation Annex III, restricted in cosmetics
    Name: TALC, Ref no: 59, Annex ref: III/59
  • Active ingredient in FDA approved drug labels

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Talc is traded under.

HS 2839.90Indicative HS code

Silicates, commercial alkali metal silicates, other

World exports in 2024
$241M
−2.7% vs 2023, imports $307M
2019 to 2024
Top exporters
  1. China20.4%
  2. United States17.9%
  3. Netherlands11.7%
Top importers
  1. Saudi Arabia13.5%
  2. Germany8.3%
  3. United States7.3%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Talc is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Talc, based on the data on this page

What is Talc?

Talc is finely-powdered native hydrous magnesium silicate. When administered into the pleural space, talc initiates an inflammatory reaction, resulting in adhesion of the visceral pleura to the parietal pleura and fibrosis, thereby effectively closing the pleural space and preventing further accumulation of fluid.

What is the CAS number of Talc?

The CAS registry number of Talc is 14807-96-6.

What is the molecular formula and weight of Talc?

The molecular formula of Talc is H2Mg3O12Si4 and its molar mass is 379.26 g/mol.

What is Talc used for?

Additive to clay in ceramic manufacture and paper coatings, for roofing materials. Carrier and diluent for insecticides, filler and pigment for paints and elastomers, additive in manufacture of refractories.

Is Talc hazardous?

No GHS hazard classification for Talc is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Talc?

Talc is usually classified under HS code 283990 (Silicates, commercial alkali metal silicates, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Talc?

CompoundList lists 90 suppliers of Talc in United States, India, China, Germany and 11 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Talc in India?

17 suppliers in India list Talc on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Talc?

Suppliers quote Talc on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Talc

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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