Kaolinite (Al2(OH)4(Si2O5))

CAS 1318-74-7

Companies reported imports and no US production of this chemical to EPA for 2023.

Molecular structure of 1318-74-7 — 4 OH⁻ · 2 Al³⁺

US productionZero

Import value, 2024$26M

Import volume21.5K lb

Import dependency100%

Top sourceBrazil 76%

Production is reported production, not a complete census of factories. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Kaolinite (Al2(OH)4(Si2O5)) · US import value by year

2013: $56M · Peak 2014: $57M · 2024: $26M · 2025: $10M

Where It Comes From

Customs basis: HS 250700 · narrow

EPA reports by year

2023: US production Zero · Imports 21.5K lb
2019: US production Confidential · Imports Confidential

These shares come from HS customs code 250700, which covers 3 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries

Country of origin for US imports, from Census customs data (2024).

BR 76%BrazilGB 10%United KingdomDE 3%GermanyBG 2%BulgariaNZ 2%New Zealand

Spain
Canada
Italy
Portugal
Hong Kong
Cameroon
Malaysia
Austria
Ireland
Ukraine
Japan
Turkey

EPA-registered importers (1)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Johnson Matthey

Why It Matters

Sectors

EnergyCore Chemicals

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

Used in 2 sectors as 1 functional role.

•Catalyst in All Other Chemical Product and Preparation Manufacturing (86%)Use—non-incorporative activities
•Catalyst in Industrial Gas Manufacturing (14%)Use—non-incorporative activities

Vendor Pricing

$0.23/gA2B Chem LLC

CountryUnited States

Pack$116.00 / 500 g

PurityNot recorded

Vendors5 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

4 more vendors

Vendor	Country	$/g	Pack	Purity
Aaron Chemicals LLC	Hong Kong	$0.24	500 g	—
Angene Chemical	China → Hong Kong	$0.25	500 g	—
AA BLOCKS	United States	$0.30	500 g	—
AK Scientific, Inc.	United States	$0.43	500 g	—

Chemical Identity

CAS1318-74-7

PubChem CID71300855

DTXSIDDTXSID70892217

FormulaAl2H4O9Si2

Mol. Weight258.16 g/mol

SMILES[OH-].[OH-].[OH-].[OH-].[O-][Si](=O)O[Si](=O)[O-].[Al+3].[Al+3]

Data Sources

EPA CompTox (DSSTox) · DTXSID70892217Retrieved 2026-04-06
PubChem · compound 71300855Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Kaolinite (Al2(OH)4(Si2O5)) (CAS 1318-74-7) https://chemicalindependence.com/chemical/1318-74-7/ EPA CompTox (DSSTox): DTXSID70892217. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID70892217 PubChem: 71300855. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/71300855 EPA Chemical Data Reporting: 1318-74-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 1318-74-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 250700 for CAS 1318-74-7. Reporting year: 2024. https://usatrade.census.gov/