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CARYA ILLINOENSIS SHELL POWDER.

Valuable CAS 246166-03-0 / 129893-27-2 / ABRASIVE, BULKING

A natural mechanical exfoliant derived from finely ground pecan shells that provides precise resurfacing of the skin's uppermost layers. Unlike synthetic beads, this botanical abrasive offers a sustainable method for smoothing texture while naturally providing secondary antioxidant benefits through its inherent polyphenol content.

Abrasive Exfoliant Bulking Agent

Science

It functions through physical attrition, where micronized particles mechanically dislodge dead corneocytes from the stratum corneum. This process accelerates cellular turnover and instantly refines skin topography by polishing away surface debris and environmental impurities.


Research

High confidence
Effective range 1–10%
Optimal

5%

Key findings

  1. 01 Demonstrated efficacy as a mechanical abrasive for removing surface impurities and providing gallic and ellagic acid antioxidants (Journal of Food Quality, 2024).
  2. 02 Assessment of particle size consistency for resurfacing without the irritation associated with non-biodegradable synthetic alternatives (CIR Nut-Derived Ingredients Assessment).

Transparency

Not commonly dusted
Min. effective
1%
Red flag below
0.5%

Because it is an insoluble physical exfoliant, concentrations below 1% are typically insufficient to provide tactile or visible resurfacing results, often indicating its use for marketing claims rather than functional efficacy.


The Formula

Solubility
Insoluble
Optimal pH 3 – 10
0 7 14

Stability

Highly inert and stable across a broad pH spectrum; requires high-viscosity systems or specialized suspending agents to prevent particle sedimentation.

Synergies

  • High-viscosity polymers
  • Suspending agents
  • Emollients

Conflicts

  • Low-viscosity aqueous solutions
  • Strong oxidizing agents

Safety

CIR Status
Safe as used
Max tested
10%
Pregnancy
Safe
Sensitization risk Low

Safe when processed to eliminate protein allergens; users should avoid excessive pressure during application to prevent micro-abrasions.


Your Skin

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

Our Assessment

Valuable

A high-performance, natural physical exfoliant that offers reliable texture refinement and secondary antioxidant protection when suspended in high-viscosity formulations.


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