Food use
Nothing to weigh for this context yet.
We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.
- beauty
- food
- industrial
- pharma
Mercuric oxide
CAS 1344-45-2
Also registered as 2 other CAS numbers
8028-34-0 · 21908-53-2
Concern score
Not assessed — no hazard data yet.
Mercuric oxide in plain language
Also known as Yellow mercuric oxide · Hydrargyri oxydum rubrum · Red mercuric oxide · Mercuric(II) oxide yellow · (Oxido)mercury · Hongfen
Show all 25 names
Mercuric oxide (purified) · Mercuric oxide red · Mercuric oxide, red (who-dd) · Mercuric oxide, yellow (who-dd) · Mercury oxide (hgo) · mercury(2+);oxygen(2-) · BP-21446 · C18670 · Mercuric monooxide · Mercury(2+) oxide · Monoxyde de mercure · mercuric oxide (sara 302/313) (cercla) · mercuric oxide (sara iii) · mercuric oxide (sara iii).osha pel is ceiling value. · mercury monoxide · mercury oxide · mercury(ii) oxide · monoxido de mercurio · Mercurius praecipitatus ruber
Used in cosmetics as an antimicrobial.
- Antimicrobial
- We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.
Regulation
No restrictions found. Mercuric oxide appears in these published regulatory listings.
- In marketed US drugs
- Found in consumer products
- Pharma
- Food
- Industrial
EUCosIngActiveRestriction: II/221
- Restriction: II/221Source →
USEPAcommercial use observedEPA CPDat observed this chemical in 322 composition records across product categories including Laboratory supplies, Batteries, Vehicle. EPA CPDat classifies this chemical for functional uses including Biocide.
- EPA CPDat observed this chemical in 322 composition records across product categories including Laboratory supplies, Batteries, Vehicle. EPA CPDat classifies this chemical for functional uses including Biocide.Source →
USFDAmarketed drug occurrenceFDA NDC lists this ingredient in 18 active drug products and 19 total products.
- FDA NDC lists this ingredient in 18 active drug products and 19 total products.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →
Expert safety opinions
No expert opinion on file for Mercuric oxide. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.
SCCS
EU Scientific Committee on Consumer Safety
No SCCS opinion on file.
CIR
Cosmetic Ingredient Review (US expert panel)
No CIR safety assessment on file.
Evidence & sources
No graded research studies for Mercuric oxide yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.
Where this comes from
- Open →
CosIng
regulatory · updated 2026-09-23
- Open →
EPA Chemical and Products Database
exposure · updated 2019-12-31
- Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
- Open →
FDA National Drug Code Directory
regulatory · updated 2029-10-31
- Open →
FDA GSRS UNII
registry · updated 2026-02-26
- Open →
openFDA Substance
registry · updated 2026-05-24
- Open →
PubChem Live Enrichment
chemistry · updated 2026-05-17
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
No signal in this context
Fragrance avoidance
Nothing to weigh for this context yet.
We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.
Where it has been recorded
How often EPA CPDat has listed Mercuric oxide in a product composition. These are source records, not Greenveil catalog products.
Source records
322
Named organisations
1
Laboratory suppliesBatteriesVehicleRaw materialsFood and drug
Typical roles
Antimicrobial