Mercuric oxide
Drug ingredientCAS 21908-53-2
This chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.
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 unknownProduction 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 285210, 380859 · basket
These shares come from HS customs code 285210, 380859, which covers 44 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.
- Hong Kong
- Spain
- Costa Rica
- Germany
- Netherlands
- Czech Republic
- Denmark
6 FDA-registered drug labelers
Why It Matters
Appears in 12 drug and cosmetic product listings (FDA).
- •Mercurius Praecipitatus Ruber
- •Spinalmax
- •Arthritis Joints
- •Inflammation II
- •Ledum Combination 9257
- •Lymph I
- •D-34
- •Kalmia Combination 9228
Show all 12
- •Lymph Tonic I
- •Calcarea Combination 9214
- •Osteoreg
- •NS Support
Chemical Identity
Data Sources
- PubChem · compound 30856Retrieved 2026-04-07
- EPA TSCA InventoryRetrieved 2026-04-24
- FDA National Drug Code directoryRetrieved 2026-04-07
- US Census international tradeReporting year: 2024 · Retrieved 2026-10-04
Brief citations
Mercuric oxide (CAS 21908-53-2) https://chemicalindependence.com/chemical/21908-53-2/ PubChem: 30856. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/30856 EPA TSCA Inventory: CAS 21908-53-2. Retrieved 2026-04-24. https://www.epa.gov/tsca-inventory FDA National Drug Code directory: bulk match. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 285210,380859 for CAS 21908-53-2. Reporting year: 2024. https://usatrade.census.gov/