“Direct ex vivo evidence: formulations containing palmitic and stearic acids improved repair of tape-stripped damaged stratum corneum and supported barrier rebuilding.”
Stearic Acid (Stearic: 65%, Palmitic: 33%)
Cosmetics
Code: 254183
Cosmetic fatty acid flake for creams, lotions, balms, and emulsions. Stearic acid 63-68% with palmitic acid 30-36%, used to build body, opacity, structure, and a richer skin-care texture.
Stearic Acid (Stearic: 65%, Palmitic: 33%) is a cosmetic fatty acid blend supplied as white flakes for creams, lotions, balms, sticks, and other oil-phase skin-care systems that need more body, opacity, and structure.
This grade contains stearic acid about 63-68% and palmitic acid about 30-36%. The stearic-rich profile gives a firm, waxy structuring effect, while the palmitic fraction helps support a smooth, creamy body in emulsions and anhydrous bases.
Formulation value
- Builds viscosity, cushion, and cream body in O/W and W/O emulsions
- Improves opacity and a richer white cream appearance
- Supports firmer texture in balms, sticks, butters, and anhydrous products
- Works as a fatty-acid co-structurant with emulsifying waxes, fatty alcohols, oils, and butters
- Can be neutralized with suitable alkali in soap-style or stearate-based systems when the formula is designed for that chemistry
Use guidance
- Typical use: 1-20% depending on the desired body and firmness; lower levels may be used for minor texture adjustment
- Finished-formula pH guidance: 3.5-9.0 for normal cosmetic use
- Mixing method: melt and dissolve in the oil phase before emulsification or before cooling an anhydrous base
- Heat until fully melted and uniform, then cool with mixing to avoid graininess or uneven crystallization
Product characteristics: white flake powder.
Solubility: oil-phase material; dissolves/melts into oils and wax phases when heated. Not water-soluble.
Storage: Store tightly closed in a cool, dry place away from moisture and contamination.
INCI Name: Stearic Acid
- Room (25-40C)
- 24 Months from manufacturing or testing date.
- 0.10% - 20.00%
- 0.00%
- Add into oil phase. Heat tolerant.
- Heat Tolerant
- 3.50 - 9.00
- Soluble in Oil
- Cream, Lotion, Cleanser, Emulsifier, Skin Conditioning Agent
- -
| Test Name | Specification |
|---|---|
| Acid Value (mg KOH/g) | 200 - 206 |
| Saponification Value (mg KOH/g) | 201 - 207 |
| Iodine Value (g I/100g) | 0.8 max |
| Titre (C) | 58 - 61 |
| Color, Lovibond 5 1/4 inch, Y | 3.0 max |
| Color, Lovibond 5 1/4 inch, R | 0.3 max |
| Color, APHA (Hazen) | 60 max |
| C12 + C14 Fatty Acids (%) | 2.0 max |
| C16, Palmitic Acid (%) | 30 - 36 |
| C18, Stearic Acid (%) | 63 - 68 |
| C20, Arachidic Acid (%) | 1.0 max |
“Ingredient-family evidence: stratum-corneum fatty acids are critical for permeability-barrier function, and stearic acid is specifically discussed for replenishing cleanser-extracted fatty acids.”
“Closest physiological-lipid evidence: palmitic or stearic acid, when combined with ceramides and cholesterol, supported normal to accelerated permeability-barrier repair.”
“Ingredient-family evidence: moisturizers with emollient, occlusive, humectant, and lipid components help reduce dryness and restore impaired skin-barrier function; applicable to stearic/palmitic fatty-acid emollient use.”
“Indirect human epidermis evidence: palmitic and stearic acids are endogenous epidermal fatty acids whose levels decline in aged/photoaged skin, supporting their relevance to barrier and aging-related lipid status rather than proving direct benefit of the commercial blend.”
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