beauty
industrial
pharma

Polyisobutylene (1100000 mw)

CAS 25038-49-7

Also registered as 17 other CAS numbers

29564-41-8 · 39323-31-4 · 51810-32-3 · 53571-24-7 · 64104-22-9 · 78361-91-8 · 106818-17-1 · 131595-28-3 · 138636-31-4 · 150905-15-0 · 253604-01-2 · 946428-02-0 · 1140950-97-5 · 1140950-99-7 · 1192591-72-2 · 1195987-69-9 · 9003-27-4

Concern score

Not assessed — no hazard data yet.

Polyisobutylene (1100000 mw) in plain language

What it is: On cosmetic ingredient lists it appears as “Polyisobutene”.
Also known as Polyisobutene · Polyisobutylene (35000 mw) · Polyisobutylene 35-39 · Polyisobutylene 178-236 · Polyisobutylene · Polyisobutylene 241-294
Show all 63 names
1-Propene, 2-methyl-, homopolymer · Polyisobutylene (1000 mw) · Polyisobutylene (1300 mw) · Polyisobutylene (200000 mw) · Polyisobutylene (2300 mw) · Polyisobutylene (2600000 mw) · Polyisobutylene (400000 mw) · Polyisobutylene (4000000 mw) · Polyisobutylene (45000 mw) · Polyisobutylene (55000 mw) · Polyisobutylene (65000 mw) · Polyisobutylene (75000 mw) · Polyisobutylene (800000 mw) · Polyisobutylene (85000 mw) · Polyisobutylene (1200000 mw) · Glissopal 1300 · Polyisobutene (1000 mw) · Polyisobutene (1300) · Polyisobutene (2300 mw) · Polyisobutene (45000 mw) · Polyisobutene (55000 mw) · Polyisobutylene (1100000 mw(sub v)) · Polyisobutylene (200000 mw(sub v)) · Polyisobutylene (2500000 mw) · Polyisobutylene (2600000 mw(sub v)) · Polyisobutylene 32.5-36.0 · Polyisobutylene 416-479 · Polyisobutylene 77-94 · 1-Propene, 2-methyl-, homopolymer(C4H8)x, x = 17 · 2-Methylprop-1-ene homopolymerise · 2-Methylpropene polymer · Creasil ip cg · Colortech 10359-41 · Duro-Tak 10711-58 · Dynapak Poly 190 · Dynapak Poly 55 · Elastol · Glissopal 1000 · Glissopal 2300 · Glissopal V190 · HRD-650 · Homopolymer of 2-methyl-1 propene · Oppanol b 100 · Oppanol b 11 sfn · Oppanol b 13 sfn · Oppanol b 14N · Oppanol b 14SFN · Oppanol b 150 · Oppanol b 200 · Oppanol b 30 · Oppanol b 30 sf · Oppanol b 50 · Oppanol B12 · Polyisobutylene oppanol b 100 · Polyisobutylene oppanol b 100 (241-294) · pigments · polyisbutylene polymer
What it does: Used in cosmetics as a binder, a film former and a thickener.
Binding
Film forming
Viscosity controlling
Thickener
Film former
Is it a concern?: We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

Regulation

No restrictions found. Polyisobutylene (1100000 mw) appears in these published regulatory listings.

Inactive ingredient in US drugs

Recorded in these product areas

Found in consumer products
Beauty
Industrial

USFDAinactive ingredient database5 entries — 2 administration routes
- Route: TOPICAL; Dosage form: SYSTEM; Maximum daily exposure: 67 mgSource →
- Route: TRANSDERMAL; Dosage form: FILM, EXTENDED RELEASE; Potency: 69 mgSource →
- Route: TRANSDERMAL; Dosage form: SYSTEM; Maximum daily exposure: 23 mgSource →
- Route: TRANSDERMAL; Dosage form: FILM; Potency: 238.44 mgSource →
- Route: TRANSDERMAL; Dosage form: SYSTEM; Potency: 29.8 mgSource →
EUCosIngActiveListed in CosIng inventory for cosmetic use.
- Listed in CosIng inventory for cosmetic use.Source →
USEPAcommercial use observedEPA CPDat observed this chemical in 2273 composition records across product categories including Construction and building materials, Home maintenance, Personal care. EPA CPDat classifies this chemical for functional uses including Film former, Viscosity modifier, Binder.
- EPA CPDat observed this chemical in 2273 composition records across product categories including Construction and building materials, Home maintenance, Personal care. EPA CPDat classifies this chemical for functional uses including Film former, Viscosity modifier, Binder.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 Polyisobutylene (1100000 mw). 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 Polyisobutylene (1100000 mw) yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

6 data sources

Where this comes from

CosIng
regulatory · updated 2026-09-23
Open →
EPA Chemical and Products Database
exposure · updated may 17, 2017
Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
Open →
FDA Inactive Ingredient Database
regulatory · updated 2026-01-09
Open →
FDA GSRS UNII
registry · updated 2026-02-26
Open →
openFDA Substance
registry · updated 2026-05-24
Open →

Read →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Fragrance avoidance

Nothing to weigh for this context yet.

No signal in this context

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 Polyisobutylene (1100000 mw) in a product composition. These are source records, not Greenveil catalog products.

Source records

2,273

Named organisations

Construction and building materialsHome maintenancePersonal careElectronics/small appliancesVehicleIndustrial products

Typical roles

BindingFilm formingViscosity controllingThickenerFilm former

See products using Polyisobutylene (1100000 mw) →

Catalog

Found in these products

Their ingredient lists include Polyisobutylene (1100000 mw); each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 158 →Find products without it →