Polyhydroxybutyrate

INCI: POLYHYDROXYBUTYRATE

CAS Number
29435-48-1 / 26744-04-7
Function
Abrasive, Skin Conditioning
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Not specifically restricted; general cosmetic ingredient. PHB is also recognized as a biodegradable polyester with food-contact and medical applications

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

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
negligible
Sensitization
none

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

PHB is biodegradable but regulators monitor particulate polymers; verify particle size specifications if used as an abrasive.

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Concern Level: Low

Frequently Asked Questions

Is Polyhydroxybutyrate safe in cosmetics?

PHB is biodegradable but regulators monitor particulate polymers; verify particle size specifications if used as an abrasive. The EU classifies Polyhydroxybutyrate as "permitted". Safety rating: GOOD.

Is Polyhydroxybutyrate allowed in the EU?

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

What does Polyhydroxybutyrate do in cosmetics?

Polyhydroxybutyrate functions as: Abrasive, Skin Conditioning. It is classified as a cosmetic ingredient in our database. CAS number: 29435-48-1 / 26744-04-7.

What is the Margin of Safety for Polyhydroxybutyrate?

not established 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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