Science
Mechanism of Action
This ingredient provides mechanical exfoliation through its finely milled, abrasive particles, which physically remove dead skin cells from the epidermis. This action promotes increased cellular turnover and results in a smoother skin surface without significantly disrupting the hydro-lipidic film. It is additionally suggested to offer remineralizing and detoxifying benefits to the skin.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
Rhyolite powder, as a naturally-sourced silicate, can generate airborne dust during handling and application. The Cosmetic Ingredient Review (CIR) Expert Panel has determined there is insufficient data to confirm its safety in products where incidental inhalation may occur. While it is processed as finely milled powder with rounded granules for cosmetic use to prevent skin damage, excessive inhalation of its dust may lead to respiratory irritation and potential lung damage (silicosis).
The Formula
Formulation
Stability
Rhyolite Exfoliator exhibits robust stability across various formulation types, including aqueous systems. It maintains its particle integrity, color, and consistent abrasiveness over time, and is readily kept in suspension, simplifying formulation development.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that for naturally-sourced silicate ingredients, which includes Rhyolite powder, there is insufficient data to determine safety for use in products that may be incidentally inhaled. While not listed as a carcinogen by MSHA, OSHA, or IARC, the generation of dust from this ingredient can cause irritation to the eyes, mild skin irritation (redness, swelling, pruritus, pain), and irritation of the respiratory tract. In excessive amounts, inhaled dust can damage the lungs (silicosis). For cosmetic application, it is used as a finely milled powder with rounded granules to mitigate skin damage.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Rhyolite Powder functions as an effective physical exfoliant, however, its classification by the CIR as having insufficient safety data for inhalation warrants caution in product development, particularly for finely dispersed formulations.
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