Holmium oxide (Ho2O3)

CAS 12055-62-8

Ho₂O₃377.9 g/mol

no molecular structure to draw

US productionNot reported

Import value, 2024$148M

Top sourceChina 75%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

Why supply is unknown

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

Where It Comes From

Customs basis: HS 284690 · basket

These shares come from HS customs code 284690, which covers 26 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).

CN 75%ChinaIT 6%ItalyJP 5%JapanAT 4%AustriaZA 3%South Africa

Israel
Liechtenstein
Russia
Armenia
Vietnam
Norway
Switzerland
Singapore
United Kingdom
Belgium
Czech Republic

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Chemical Identity

CAS12055-62-8

PubChem CIDNot recorded

DTXSIDDTXSID30894772

FormulaHo2O3

Mol. Weight377.858 g/mol

SMILES[O--].[O--].[O--].[Ho+3].[Ho+3]

Data Sources

EPA TSCA InventoryRetrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Holmium oxide (Ho2O3) (CAS 12055-62-8) https://chemicalindependence.com/chemical/12055-62-8/ EPA TSCA Inventory: CAS 12055-62-8. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 284690 for CAS 12055-62-8. Reporting year: 2024. https://usatrade.census.gov/