- beauty
- food
- pharma
Cholestyramine resin
CAS 9007-26-5
Also registered as 2 other CAS numbers
58391-37-0 · 11041-12-6
Concern score
Not assessed — no hazard data yet.
Cholestyramine resin in plain language
On cosmetic ingredient lists it appears as “Styrene methyltrimonium chloride crosspolymer”.
Also known as Styrene methyltrimonium chloride crosspolymer · Colestyramine · Cholestyramine · A-3384 · Colestyramine 20 · Cuemid
Show all 19 names
A3384 · Cholybar · Cholestyramine chloride · Cholestyramine hydroxide · Colestyramin · Duolite AP143 resin · Divistyramine · Hgmsjmjpxggebp-uhfffaoysa-n · Locholest · Prevalite · Questran · Questran light · Quantalan
Used in cosmetics as an absorbent. Styrene Methyltrimonium Chloride Crosspolymer is a polymer of Styrene and styrene methylenetrimonium chloride crosslinked with divinylbenzene.
- Absorbent
- We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.
Regulation
No restrictions found. Cholestyramine resin appears in these published regulatory listings.
- In marketed US drugs
- Found in consumer products
- Pharma
- Food
EUCosIngActiveStyrene Methyltrimonium Chloride Crosspolymer is a polymer of Styrene and styrene methylenetrimonium chloride crosslinked with divinylbenzene
- Styrene Methyltrimonium Chloride Crosspolymer is a polymer of Styrene and styrene methylenetrimonium chloride crosslinked with divinylbenzeneSource →
USEPAcommercial use observedEPA CPDat observed this chemical in 1 composition records across product categories including Food and drug. EPA CPDat classifies this chemical for functional uses including Absorbent.
- EPA CPDat observed this chemical in 1 composition records across product categories including Food and drug. EPA CPDat classifies this chemical for functional uses including Absorbent.Source →
USFDAmarketed drug occurrenceFDA NDC lists this ingredient in 35 active drug products and 38 total products.
- FDA NDC lists this ingredient in 35 active drug products and 38 total products.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as polymer.
- openFDA substance registry classifies this ingredient as polymer.Source →
Expert safety opinions
No expert opinion on file for Cholestyramine resin. 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 Cholestyramine resin 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 2020-08-31
- Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
- Open →
FDA National Drug Code Directory
regulatory · updated 2027-12-31
- 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
Reference links (1)
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
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.
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 FDA National Drug Code directory has listed Cholestyramine resin in a product composition. These are source records, not Greenveil catalog products.
Source records
38
Typical roles
Absorbent