Hydroxybutyl Methylcellulose

INCI: HYDROXYBUTYL METHYLCELLULOSE

CAS Number
9041-56-9
Function
Thickener, binder, film-forming agent, viscosity controlling agent
Safety Rating
EXCELLENT

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted โ€” CIR reviewed cellulose derivative group as safe for use as cosmetic ingredients

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

Minimal safety concern; nonirritating to slightly irritating to skin at up to 100% with no mutagenic, developmental, or reproductive effects.

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Concern Level: Low

Frequently Asked Questions

Is Hydroxybutyl Methylcellulose safe in cosmetics?

Minimal safety concern; nonirritating to slightly irritating to skin at up to 100% with no mutagenic, developmental, or reproductive effects. The EU classifies Hydroxybutyl Methylcellulose as "permitted". Safety rating: EXCELLENT.

Is Hydroxybutyl Methylcellulose allowed in the EU?

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

What does Hydroxybutyl Methylcellulose do in cosmetics?

Hydroxybutyl Methylcellulose functions as: Thickener, binder, film-forming agent, viscosity controlling agent. It is classified as a cosmetic ingredient in our database. CAS number: 9041-56-9.

What is the Margin of Safety for Hydroxybutyl Methylcellulose?

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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