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Moumoujus

POLYVINYL BUTYRAL.

Questionable CAS 63148-65-2 / BINDING, FILM FORMING, VISCOSITY CONTROLLING

Polyvinyl Butyral is a synthetic polymer primarily utilized in cosmetic formulations for its ability to create a continuous film on surfaces like skin and nails. It also functions as a binding agent, helping to cohere powdered products, and as a viscosity modifier to achieve desired product textures.

Summary

Film-forming Binding Viscosity controlling

Science

Mechanism of Action

This ingredient forms a continuous, cohesive film upon application to the skin, hair, or nails, providing a smooth finish or holding components in place. Beyond its film-forming capacity, it acts as a binder, contributing to the structural integrity of solid or powdered cosmetic formulations, and helps to precisely adjust the viscosity of liquid preparations.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

While Polyvinyl Butyral is not typically associated with 'dusting' issues in finished cosmetic products, physical processes like cutting or grinding of the raw material can generate particulates that may cause minor mechanical irritation to eyes.

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Polyvinyl Butyral demonstrates stability under standard storage conditions. However, it is a combustible material, and its dust can form explosive mixtures with air. Elevated temperatures can induce decomposition, releasing compounds such as acrolein and carbon monoxide. It requires storage in cool, dry, well-ventilated spaces, shielded from direct sunlight and heat sources.

Conflicts

  • strong oxidizing agents

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Moderate

Polyvinyl Butyral is not categorized as hazardous under GHS criteria and exhibits very low acute toxicity across oral, dermal, and inhalation routes. Environment Canada deems it not potentially toxic, harmful, or bioaccumulative. While general skin irritation is not expected under normal use, some sources assign risk codes R36/37/38, indicating potential irritation to eyes, respiratory system, and skin. A murine local lymph node assay suggested it could be a sensitizer at an EC3 of 3.6%, though human patch tests conducted on employees did not yield positive results, presenting conflicting data regarding sensitization potential.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Verdict

Questionable

Polyvinyl Butyral serves primarily as a functional ingredient for film formation and binding in specialized cosmetic products, but its safety profile presents conflicting data regarding irritation and sensitization, alongside a 'not reviewed' CIR status, making it questionable for precision skincare without further clarification.

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