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Silicates, borates and other salts

Calcium silicate

Also known as Calcarea silicata, Huberderm 1000, INS NO.552

CAS 1344-95-2Formula H6CaO8Si2Molar mass 230.29 g/molEC 215-710-8
GHS signal word: Warning. Pictograms: Harmful or irritant 43 suppliers listed Drug substance
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Calcium silicate chemical structure, H6CaO8Si2, CAS 1344-95-2
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
White powder
Melting point
1,540 °C
Density
2.92 g/cm³
Solubility
Insoluble in water
HS code
283990
Category
Silicates, borates and other salts
Illustrative photo, fine white powder in a white HDPE jar on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Calcium silicate?

Plain description, key identifiers and synonyms

Calcium silicate is a chemical substance with the molecular formula H6CaO8Si2 and a molar mass of 230.29 g/mol. Its CAS registry number is 1344-95-2. The IUPAC name is calcium bis(trihydroxy(oxido)silane).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
calcium bis(trihydroxy(oxido)silane)
CAS number
1344-95-2 CAS number cross-checkedOther or deprecated CAS: 10101-39-0
EC numbers
215-710-8, 233-250-6
Molecular formula
H6CaO8Si2
UNII
S4255P4G5M
INCI name
CALCIUM SILICATE
InChIKey
LECAAGVQUHQAJK-UHFFFAOYSA-N
InChI
InChI=1S/Ca.2H3O4Si/c;2*1-5(2,3)4/h;2*1-3H/q+2;2*-1
SMILES (canonical and isomeric)
O[Si](O)(O)[O-].O[Si](O)(O)[O-].[Ca+2]

Synonyms

  • Calcarea silicata
  • Huberderm 1000
  • INS NO.552
  • Head Cold
  • Calcium salt of silicic acid
  • Calcium hydrosilicate
  • Calcium monosilicate
  • Calcium Orthosilicate
  • Calcium silicate, synthetic nonfibrous
  • Calflo E
  • Calsil
  • CS Lafarge
  • Florite R
  • Marimet 45
  • Micro-Cel
  • Micro-Cel A
  • Micro-Cel B
  • Micro-Cel C
  • Micro-Cel E
  • Micro-Cel T
  • Micro-Cel T26
  • Micro-Cel T38
  • Micro-cel T41
  • Microcal 160
  • Microcal ET
Show all 34 synonyms
  • Promaxon P60
  • Silene EF
  • Silicic acid, calcium salt
  • Silmos T
  • Solex
  • Stabinex NW 7PS
  • Starlex L
  • SW 400
  • Toyofine A

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 powderexp.
Melting point
1,540 °Cexp.
Density
2.92 g/cm³exp.
Solubility
Insoluble in waterexp.
Vapour pressure
0 mmHg (approx)exp.

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
230.29 g/molcalc.
Exact mass
229.9227 Dacalc.
LogP (octanol/water)
-6.86calc.
Topological polar surface area
167.5 Ųcalc.
Hydrogen bond donors
6calc.
Hydrogen bond acceptors
8calc.
Rotatable bonds
0calc.
Heavy atoms
11calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant
020NFPA 704 rating

Hazard statements

  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (11)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P337 + P317If eye irritation persists: Get medical help.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

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

Calcium silicate suppliers

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

All 43 suppliers
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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

43 suppliers in 8 countries

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Calcium silicate price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

The active ingredient is no longer contained in any registered (pesticide) products ... "cancelled.".

Calcium silicate functions as an absorbent, bulking agent, and an opacifying agent in cosmetic formulations.

Constituent of lime glass, Portland cement, reinforcing filler in elastomers and plastics, absorbent for liquids, gases, vapors, as suspension agent, anti-caking agent, pigment and pigment extender, binder for refractory material, in chromatography, in road construction.

The National Formulary category is as a glident and/or anticaking agent.

Industrial uses: Filler, Flow promoter, Hardener, Pigment, Other, Wetting agent (non-aqueous), Anti-caking agent, Processing aids not otherwise specified.

Consumer uses: Filler, Pigment, Other.

Use classes: Processing Aids and Additives, Safer Chemical Classes, Food additives, Cosmetics.

Cosmetic ingredient, INCI name CALCIUM SILICATE(absorbent, bulking, opacifying)

Functional uses

  • Abrasive
  • Absorbent
  • Anti-caking agent
  • Filler
  • Flavouring and nutrient
  • Flow promoter
  • Lubricating agent
  • Opacifer
  • Processing aids not otherwise specified
  • Viscosity modifier

Cosmetic functions

  • Absorbent
  • Bulking
  • Opacifying

How it is made

The refinement of wollastonite ore into high-grade wollastonite was originally done by manual selection at many mines. This process is now performed by screening and magnetic separators, sometimes in combination with flotation and vacuum filtration. Grinding and milling operations can produce variable mesh powders or aggregates.

Occurs naturally in wollastonite as calcium metasilicate, combination of calcium ions (from limestone, dolomite, etc) and silicate ions (from silica).

Commercial calcium silicate sold for industrial use ... is prepared synthetically to control its absorbing power. The usual method of preparation is from lime and diatomaceous earth under carefully controlled conditions.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • Active ingredient in FDA approved drug labels
  • Food additive

United States

  • Safer Choice ingredient list (USA)
  • 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 Calcium silicate 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 Calcium silicate is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Calcium silicate, based on the data on this page

What is Calcium silicate?

Calcium silicate is a chemical substance with the molecular formula H6CaO8Si2 and a molar mass of 230.29 g/mol. Its CAS registry number is 1344-95-2. The IUPAC name is calcium bis(trihydroxy(oxido)silane).

What is the CAS number of Calcium silicate?

The CAS registry number of Calcium silicate is 1344-95-2. Other or deprecated CAS numbers: 10101-39-0.

What is the molecular formula and weight of Calcium silicate?

The molecular formula of Calcium silicate is H6CaO8Si2 and its molar mass is 230.29 g/mol.

What is Calcium silicate used for?

The active ingredient is no longer contained in any registered (pesticide) products ... "cancelled.". Calcium silicate functions as an absorbent, bulking agent, and an opacifying agent in cosmetic formulations.

Is Calcium silicate hazardous?

Calcium silicate carries the GHS signal word "Warning". Main hazards: causes serious eye irritation, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Calcium silicate?

Calcium silicate 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 Calcium silicate?

CompoundList lists 43 suppliers of Calcium silicate in India, United States, China, United Kingdom and 4 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Calcium silicate in India?

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

What is the price of Calcium silicate?

Suppliers quote Calcium silicate 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 Calcium silicate

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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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