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3-HYDROXYBUTYRATE/4-HYDROXYBUTYRATE COPOLYMER.

Valuable CAS 125495-90-1 / ABRASIVE, VISCOSITY CONTROLLING

A biodegradable polymer derived from fermentation that functions as an eco-friendly physical exfoliant, replacing traditional microbeads. This sustainable PHA-family copolymer delivers gentle mechanical exfoliation while maintaining skin barrier integrity across all skin types.

Physical exfoliant Viscosity modifier Biodegradable abrasive

Science

Forms solid biodegradable particles that mechanically slough away dead skin cells from the stratum corneum through gentle physical abrasion, while simultaneously providing viscosity control in formulations without compromising the skin's protective barrier.


Research

Medium confidence
Effective range 0.5–5%
Optimal

2.75%

Key findings

  1. 01 Provides gentle physical exfoliation without harsh sensation or irritation compared to synthetic polymers in wash-off formulations

Transparency

Not commonly dusted

Physical exfoliant typically used at effective concentrations; primary function requires meaningful particle density


The Formula

Solubility
Oil
Optimal pH 3 – 9
0 7 14

Stability

Demonstrates exceptional chemical stability across wide pH range with resistance to discoloration; maintains particulate integrity in aqueous suspensions

Conflicts

  • High temperatures above 120°C cause structural degradation
  • Strong oxidizing agents may compromise polymer integrity

Safety

CIR Status
Not reviewed
Pregnancy
Safe
Sensitization risk Low

Component monomers are natural metabolites; P4HB component has FDA clearance for medical device applications, demonstrating high biocompatibility


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

An effective, sustainable physical exfoliant suitable for all skin types seeking gentle mechanical exfoliation without environmental impact.


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