Stannous oxide

CAS 21651-19-4

U.S. production volumes are classified as confidential business information.

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Import value, 2024$123M

Top sourceBrazil 32%

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

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

Where It Comes From

Customs basis: HS 282590 · basket

EPA reports by year

2023: US production Confidential · Imports Confidential
2019: US production Confidential · Imports Confidential

These shares come from HS customs code 282590, which covers 34 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 32%BrazilTR 15%TurkeyCN 9%ChinaVN 8%VietnamKR 8%South Korea

Ireland
Mexico
Spain
Belgium
Switzerland
Trinidad and Tobago
Hong Kong

EPA-registered manufacturers (1)

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

Mason

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.

The Shepherd Material Science

Why It Matters

Sectors

Textiles

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

•Pigment in Synthetic Dye and Pigment ManufacturingProcessing as a reactant

Vendor Pricing

$0.20/gAK Scientific, Inc.

CountryUnited States

Pack$204.00 / 1 kg

Purity98%

Vendors4 available

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

3 more vendors

Vendor	Country	$/g	Pack	Purity
Combi-Blocks, Inc.	United States	$0.25	1 kg	95%
Sigma-Aldrich (Rush Stock)	Germany	$0.73	500 g	97%
Sigma-Aldrich	Germany	$0.73	500 g	97%

Chemical Identity

CAS21651-19-4

PubChem CID88989

DTXSIDDTXSID2066723

FormulaOSn

Mol. Weight134.71 g/mol

SMILESO=[Sn]

Data Sources

EPA CompTox (DSSTox) · DTXSID2066723Retrieved 2026-04-06
PubChem · compound 88989Retrieved 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

Stannous oxide (CAS 21651-19-4) https://chemicalindependence.com/chemical/21651-19-4/ EPA CompTox (DSSTox): DTXSID2066723. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2066723 PubChem: 88989. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/88989 EPA Chemical Data Reporting: 21651-19-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 21651-19-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 282590 for CAS 21651-19-4. Reporting year: 2024. https://usatrade.census.gov/