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Pentaerythityl Tetraisostearate: The Non-Greasy Hydrator
Pentaerythityl tetraisostearate is a high-performance liquid ester widely used in premium personal care formulations. It is a large molecular weight oil designed to deliver superior moisturization without the heaviness of traditional oils.
Its primary selling point is its unique "rich but non-greasy" texture. It provides deep hydration and a soft, silky after-feel, making it perfect for products claiming to be lightweight yet effective.
In hair care, it excels at improving wet combability and smoothness without leaving residue. Additionally, it acts as an excellent dispersing agent for pigments like titanium dioxide, ensuring even coverage in sunscreens and makeup. It is non-irritating, stable, and offers excellent breathability, making it a versatile choice for modern, high-quality skincare and hair products.
Items | Specifications | Results |
Appearance（25℃） | Light yellow or yellow transparent oily liquid | Complies |
Colour(APHA) | Max.200 | Complies |
Acid Value(mgKOH/g） | Max.2 | Complies |
Saponification Value(mgKOH/g） | 182-192 | Complies |
Hydroxyl Value(mgKOH/g） | Max.10 | Complies |
Iodine Value(g/100g) | Max.10 | Complies |
Water Content(%) | Max.0.5 | Complies |
Conclusion | The product conforms to the above specifications. | |
Pentaerythityl Tetraisostearate (often abbreviated as PTIS) is a high-performance liquid ester used primarily in personal care formulations.
It is a large molecular weight oil derived from pentaerythritol and isostearic acid. In simple terms, it is a specialized emollient designed to provide heavy-duty moisturization without the "greasy" feeling associated with traditional oils.
Here are the specific selling points and characteristics that make it valuable in cosmetic formulations:
Key Selling Points
1. "Rich but Non-Greasy" Texture
This is its strongest selling point. Despite being a rich emollient, it has a unique molecular structure that provides a 清爽 (fresh/clean) skin feel. It offers(moisturization) and softness but leaves no oily or sticky residue. This makes it ideal for products that claim to be "hydrating but lightweight."
2. Excellent Hair Affinity
It is highly effective in hair care. It improves the wet feel of hair, making it feel smooth and moist during washing, and leaves the hair feeling conditioned but not heavy or greasy after drying. It helps with detangling and smoothness.
3. High Stability & Breathability
Breathability: Its unique structure allows the skin to breathe, preventing the "suffocating" feeling of heavy waxes.
Formulation Stability: In shampoo and liquid formulations, it does not significantly affect viscosity or foam stability. It also resists lowering the viscosity of the system over time (long-term storage stability).
4. Superior Dispersibility
It acts as an excellent dispersing agent and suspending agent for pigments and powders, specifically Titanium Dioxide (TiO2) and Zinc Oxide (ZnO). This makes it very useful in sunscreens and makeup (foundations) to ensure even coverage and prevent clumping.
5. Safety and Mildness
It is considered non-toxic and non-irritating to the skin, with a neutral pH (6-7). It is safe for use in various applications, including creams, lotions, and hair conditioners.
Technical Snapshot
Here is a quick breakdown of its physical properties and recommended usage:
Property Specification / Value
Appearance Pale yellow transparent liquid
Solubility Insoluble in water; Soluble in oils/esters
CAS Number 62125-22-8
Molecular Weight ~1201.99 (Large molecule)
Recommended Dosage Skincare: 1-5%
Shampoo/Wash: 0.2-1.0%
Hair Care: 1-4%
Common Applications
Because of these selling points, you will typically find this ingredient in:
Skincare: Creams, lotions, and makeup removers (where a non-greasy after-feel is desired).
Hair Care: Conditioners, hair masks, and shampoos (for smoothness).
Color Cosmetics: Foundations and sunscreens (for pigment dispersion).
Storage Note: To maintain these qualities, it should be stored in a sealed container in a cool, dry place, ideally below 32°C.
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