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Chemical substance record

Kaolinite

1318-74-72Al.4HO.O5Si2258.159 g/mol
MineralChEBI source record

An aluminosilicate mineral with approximate chemical composition H2Al2Si2O8.H2O. Rocks that are rich in kaolinite are known as kaolin or china clay. — ChEBI

Safety references

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Identity & molecular properties

Source-linked values
CAS number1318-74-7ChEBI ↗
Molecular formula2Al.4HO.O5Si2ChEBI ↗
Molar mass258.159 g/molChEBI ↗
Monoisotopic mass257.90246 DaChEBI ↗
Formal charge0ChEBI ↗
ChEBI identifierCHEBI:140499ChEBI ↗

Names & structural identifiers

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kaolinite
CYPPCCJJKNISFK-UHFFFAOYSA-J
O=[Si]([O-])O[Si](=O)[O-].[Al+3].[Al+3].[OH-].[OH-].[OH-].[OH-]
InChI=1S/2Al.O5Si2.4H2O/c;;1-6(2)5-7(3)4;;;;/h;;;4*1H2/q2*+3;-2;;;;/p-4

Classification & relationships

ChEBI ontology
aluminosilicate mineralChEBI parent class · 48730 ↗
mineral

Mass ↔ amount of substance

Calculated from sourced mass
Equivalent amount
0.00387358 mol

Uses 258.159 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Research & patent references

Selected source associations
Heteroaggregation of graphene oxide nanoparticles and kaolinite colloids. ↗The Science of the total environment · 2017 Feb 1 · PMID 27884530
Effect of the acid treatment conditions of kaolinite on etheramine adsorption: A comparative analysis using chemometric tools. ↗Journal of environmental management · 2017 Jul 15 · PMID 28410517
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Sources & record history

Checked 27 Sep 2026
EMBL-EBI ChEBI · CHEBI:140499

Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0

PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.

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