Good Emollient

Hydrogenated Polyisobutene

INCI: HYDROGENATED POLYISOBUTENE

CAS Number
61693-08-1
Function
film-forming, adhesion agent, viscosity-increasing, skin-conditioning
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes CIR: safe in cosmetics at present practices of use; hydrogenated grade preferred over non-hydrogenated for improved oxidative stability; provides tackiness and cling in lip gloss; oral ingestion from lip products safe given high molecular weight limiting GI absorption

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
negligible
Sensitization
none

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Hydrogenated polyisobutylene tackifier providing cling, adhesion, and non-drip consistency in lip gloss formulations at 20-60%. CIR confirms safety at cosmetic use concentrations. No MOSH/MOAH concerns as this is a synthetic fully hydrogenated polymer, not a mineral oil-derived product. Oral ingestion from lip products is low-concern given high molecular weight limiting GI absorption. Hydrogenated grade preferred over non-hydrogenated for oxidative stability and reduced breakdown products.

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Concern Level: None

Regulatory Flags

cir-approved lip-safe film-former tackifier adhesion-agent lip-gloss oral-safe high-molecular-weight no-moah-concern synthetic-polymer

Frequently Asked Questions

Is Hydrogenated Polyisobutene safe in cosmetics?

Hydrogenated polyisobutylene tackifier providing cling, adhesion, and non-drip consistency in lip gloss formulations at 20-60%. CIR confirms safety at cosmetic use concentrations. No MOSH/MOAH concerns as this is a synthetic fully hydrogenated polymer, not a mineral oil-derived product. Oral ingestion from lip products is low-concern given high molecular weight limiting GI absorption. Hydrogenated grade preferred over non-hydrogenated for oxidative stability and reduced breakdown products. The EU classifies Hydrogenated Polyisobutene as "permitted". Safety rating: GOOD.

Is Hydrogenated Polyisobutene allowed in the EU?

Hydrogenated Polyisobutene EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Hydrogenated Polyisobutene do in cosmetics?

Hydrogenated Polyisobutene functions as: film-forming, adhesion agent, viscosity-increasing, skin-conditioning. It is classified as a Emollient in our database. CAS number: 61693-08-1.

What is the Margin of Safety for Hydrogenated Polyisobutene?

adequate The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

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