Science
Mechanism of Action
Operating as a primary surfactant, Sodium Hydrogenated Palmate efficiently reduces surface tension, facilitating the detachment and removal of dirt, sebum, and other impurities from the skin, which are subsequently rinsed away. Its emulsifying action is crucial for stabilizing oil-in-water systems, thereby preventing phase separation in product formulations. Additionally, it functions as a rheology modifier, controlling viscosity, and an opacifying agent, imparting a desired pearlescent or opaque visual quality to products.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
As a soap salt, Sodium Hydrogenated Palmate typically establishes an alkaline solution with a pH ranging from 9.0 to 10.0. Its solubility is temperature-dependent, readily dissolving in hot water and dispersing in cold water; for instance, solubility increases from 0.5 wt% at 30°C to 12 mg/L at 60°C. It is also soluble in a range of organic solvents, including amyl acetate, alcohol, CCl4, C6H6, and highly soluble in CHCl3.
Conflicts
- Hard water (leads to precipitation with ions like Ca²⁺)
- Strong acids (causes breakdown of the soap)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed this ingredient, or functionally similar soap salts like Sodium Palmate, 'safe as used' in cosmetic applications, specifically noting its suitability for rinse-off products. It has a typically low hazard rating (1) from the Environmental Working Group (EWG), indicating minimal concern for irritation or sensitization at standard concentrations. While concentrations up to 50% are common in bar soaps, its inherent alkalinity (pH approximately 9-10) may contribute to mild dryness or irritation, particularly on sensitive or compromised skin at higher concentrations. Studies on Sodium Palmate, a functionally similar ingredient, at 67.8% concentration suggest limited skin absorption and a low likelihood of sensitization, except in individuals with known specific allergies.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A highly effective cleansing and emulsifying agent, Sodium Hydrogenated Palmate is valuable in rinse-off formulations, though its alkaline pH warrants consideration for sensitive skin types.
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