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Silicates, borates and other salts

Tobermorite

Also known as Ca.6-5H2-O3-Si.4-5H2-O, pentacalcium, dioxido(oxo)silane, hydron, tetrahydrate, Calcium hydrogen oxosilanebis(olate)--water (5/2/6/4)

CAS 1319-31-9Formula H10Ca5O22Si6Molar mass 730.96 g/mol
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Tobermorite chemical structure, H10Ca5O22Si6, CAS 1319-31-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1319-31-9
Formula
H10Ca5O22Si6
Molar mass
730.96 g/mol
HS code
283990
Category
Silicates, borates and other salts

What is Tobermorite?

Plain description, key identifiers and synonyms

Tobermorite is a chemical substance with the molecular formula H10Ca5O22Si6 and a molar mass of 730.96 g/mol. Its CAS registry number is 1319-31-9. The IUPAC name is pentacalcium, hexakis(dioxido(oxo)silane), hydron, tetrahydrate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
pentacalcium, hexakis(dioxido(oxo)silane), hydron, tetrahydrate
CAS number
1319-31-9 CAS number cross-checked
Molecular formula
H10Ca5O22Si6
InChIKey
MKTRXTLKNXLULX-UHFFFAOYSA-P
InChI
InChI=1S/5Ca.6O3Si.4H2O/c;;;;;6*1-4(2)3;;;;/h;;;;;;;;;;;4*1H2/q5*+2;6*-2;;;;/p+2
SMILES (canonical and isomeric)
[H+].[H+].O.O.O.O.[O-][Si](=O)[O-].[O-][Si](=O)[O-].[O-][Si](=O)[O-].[O-][Si](=O)[O-].[O-][Si](=O)[O-].[O-][Si](=O)[O-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2]

Synonyms

  • Ca.6-5H2-O3-Si.4-5H2-O
  • pentacalcium, dioxido(oxo)silane, hydron, tetrahydrate
  • Calcium hydrogen oxosilanebis(olate)--water (5/2/6/4)

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
730.96 g/molcalc.
Exact mass
729.6409 Dacalc.
LogP (octanol/water)
-22.24calc.
Topological polar surface area
505.1 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
18calc.
Rotatable bonds
0calc.
Heavy atoms
33calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
17calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

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

Tobermorite suppliers

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Tobermorite 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

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Tobermorite 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 Tobermorite is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Tobermorite?

Tobermorite is a chemical substance with the molecular formula H10Ca5O22Si6 and a molar mass of 730.96 g/mol. Its CAS registry number is 1319-31-9. The IUPAC name is pentacalcium, hexakis(dioxido(oxo)silane), hydron, tetrahydrate.

What is the CAS number of Tobermorite?

The CAS registry number of Tobermorite is 1319-31-9.

What is the molecular formula and weight of Tobermorite?

The molecular formula of Tobermorite is H10Ca5O22Si6 and its molar mass is 730.96 g/mol.

What is Tobermorite used for?

Known uses and roles of Tobermorite include fillers and thixotropes in adhesives and sealants.

Is Tobermorite hazardous?

No GHS hazard classification for Tobermorite 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 Tobermorite?

Tobermorite 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 Tobermorite?

Post a free request on CompoundList and suppliers of Tobermorite will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Tobermorite?

Suppliers quote Tobermorite 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 Tobermorite

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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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