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Moumoujus

DIMER ROSIN.

Insufficient Data CAS 65997-05-9 / NOT REPORTED

Dimer Rosin, or Polymerized Rosin, is a chemically modified natural resin engineered for enhanced stability and physical properties. In advanced cosmetic formulations, it primarily serves as a functional component, contributing to the structural integrity and desired texture of products.

Summary

Film forming Binding Tackifying

Science

Mechanism of Action

This ingredient is derived from natural rosin acids that undergo a dimerization process, significantly increasing their molecular weight and softening point. This modification reduces the number of double bonds, thereby enhancing the resin's resistance to oxidation and improving overall stability. Within a cosmetic matrix, Dimer Rosin functions mechanistically as a film former, binder, or tackifier, influencing the formulation's physical characteristics rather than directly modulating skin biology.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Dimer Rosin exhibits improved oxidative stability compared to its unmodified counterpart due to reduced unsaturation. However, its flaked forms can gradually oxidize, potentially causing discoloration and affecting solubility in organic solvents. Optimal storage involves strict inventory control and prioritizing the use of older material. Expected shelf life under proper conditions is at least 18 months.

Conflicts

  • Water
  • Methanol
  • Ethanol
  • Isopropanol
  • Polyalcohols (reacts to form high melting derivatives)
  • Hydrated lime (reacts to form high melting derivatives)

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) Expert Panel has not specifically assessed Dimer Rosin. While the European Chemicals Agency (ECHA) notes its industrial use in various coatings and polymers, the U.S. Environmental Protection Agency (EPA) identified 'low to moderate human health concerns' primarily related to potential dermal and respiratory sensitization for rosins and their derivatives. However, the EPA also notes poor absorption across all exposure routes, suggesting a low overall exposure risk. It is generally recognized as 'Approved for External Use'.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Insufficient Data

While a functional ingredient for formulation stability, the absence of specific skin-related clinical efficacy data and a comprehensive CIR review currently limits its classification as a precision skincare active.

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