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.
- beauty
- industrial
Steartrimonium methosulfate
CAS 39336-75-9
Also registered as 1 other CAS number
18684-11-2
Concern score
Not assessed — no hazard data yet.
Steartrimonium methosulfate in plain language
Also known as 1-Octadecanaminium, N,N,N-trimethyl-, methyl sulfate (1:1) · 1-OCTADECANAMINIUM, n,n,n-trimethyl-, methyl sulfate · Ammonium, trimethyloctadecyl-, methyl sulfate · N,N,N-Trimethyloctadecan-1-aminium methyl sulfate · N-octadecyl-n,n,n-trimethylammonium methosulfate · Stearyltrimonium methosulfate
Show all 20 names
methyl sulfate;trimethyl(octadecyl)azanium · Empigen cm · N,N,N-TRIMETHYL-1-OCTADECANAMINIUM methyl sulfate · N,N,N-Trimethyl-1-octadecanaminium methyl sulfate (1:1) · Octadecyltrimethylammonium methyl sulfate · Stearyltrimethylammonium methyl sulfate · Stearyl trimethylammonium methyl sulfate · Trimethyl(octadecyl)ammonium methyl sulphate · Trimethyloctadecylammonium methosulfate · methyl sulfate Trimethyloctadecylammonium · Trimethylstearylammonium methyl sulfate · Trimethylstearylammonium methylsulfate · UNII-83454CS6TR · Zabulen EP
Used in cosmetics as a hair conditioner and an antistatic agent.
- Hair conditioning
- Antistatic
- Conditioner
- We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.
Regulation
No restrictions found. Steartrimonium methosulfate appears in these published regulatory listings.
- Found in consumer products
- Industrial
EUCosIngActiveListed in CosIng inventory for cosmetic use.
- Listed in CosIng inventory for cosmetic use.Source →
USEPAcommercial use observedEPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Anti-static agent, Softener and conditioner.
- EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Anti-static agent, Softener and conditioner.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 Steartrimonium methosulfate. 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 Steartrimonium methosulfate 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 2019-12-20
- Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
- 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
Where it has been recorded
How often EPA CPDat has listed Steartrimonium methosulfate in a product composition. These are source records, not Greenveil catalog products.
Named organisations
1
Typical roles
Hair conditioningAntistaticConditioner