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Polyglyceryl-2 Sesquicaparylate is a plant-derived, oil-soluble emulsifier and texture enhancer used in cosmetics.
Its primary use is to stabilize lotions and creams while providing a light, silky, non-greasy feel. It helps blend oils into water-based formulas, improves spreadability, and gives products a high-quality, fast-absorbing finish.
Common in lightweight moisturizers, sunscreens, serums, and makeup, it is valued for its mildness, compatibility with natural formulations, and ability to create stable, elegant textures.
Items | Specifications | Results |
Appearance | Milky white, light yellow to yellow oily and extremely viscous liquid | Light yellow viscous liquid |
Acid Value, mgKOH/g | ≤6.0 | 1.3 |
Iodine Value, gl2/100g | ≤5.0 | 0.9 |
Saponification, mgKOH/g | 200-230 | 212 |
(Pb)/Lead Value, mg/kg | ≤2.0 | Not detected |
Mass spectrum | No ion peaks with differences of 44,58 or their integer multiples appear | Pass |
Conclusion | The product conforms to the above specifications. | |
It is a non-ionic, oil-soluble surfactant and emollient ester widely used in cosmetic and skincare formulations. Let's break down the name:
Polyglyceryl-2: This refers to a glycerin polymer made of, on average, 2 glycerol units. It forms the hydrophilic (water-loving) "head" of the molecule.
Sesqui: A Latin-derived prefix meaning "one and a half" (sesqui).
Caprylate: Refers to caprylic acid, a saturated fatty acid derived from coconut oil or palm oil. It forms the lipophilic (oil-loving) "tail" of the molecule.
In simple terms: It is created by reacting a short-chain polyglycerin with about 1.5 equivalents of caprylic acid per polyglycerin molecule. This results in a molecule that is predominantly oil-soluble with mild surfactant properties.
Its usefulness stems from its unique combination of properties, making it a versatile cosmetic ingredient.
Co-Emulsifier & Stabilizer: Its main role is to stabilize oil-in-water (O/W) emulsions. While not a primary emulsifier on its own, it works synergistically with other emulsifiers (like Polyglyceryl-3 Diisostearate or Cetearyl Glucoside) to create finer, more stable, and glossy emulsions (lotions, creams) that are resistant to temperature changes.
Texture & Sensory Enhancer: This is a major benefit. It imparts an exceptionally light, silky, non-greasy, and fast-absorbing feel to oils and formulas. It reduces the heavy, occlusive feel of some oils and butters.
Solubilizer: It can help dissolve small amounts of oil-soluble active ingredients or fragrances into water-based products (like toners or serums).
Spreading Agent: Improves the spreadability of products on the skin, ensuring even application.
Moisturizing Agent: Acts as an emollient, helping to soften and smooth the skin's surface by forming a protective lipid layer.
Natural Origin & Compatibility: Derived from plant-based glycerin and fatty acids, it is appreciated in "clean" and natural cosmetic formulations. It is also biodegradable and has excellent skin compatibility, being gentle and non-irritating.
You will find it in a wide range of rinse-off and leave-on cosmetics:
Lightweight Face Creams & Lotions
Sunscreens (helps with spreadability and stability)
BB/CC Creams & Makeup Primers
Serums (especially those with oily actives)
Cleansing Oils & Balms (helps the oil rinse off cleanly with water)
Hair Conditioners & Styling Products (provides softness without weigh-down)
Lipsticks and Lip Glosses
Decorative Cosmetics
vs. Simple Oils (e.g., Caprylic/Capric Triglyceride): POLYGLYCERYL-2 SESQUICAPARYLATE is a modified ester, not a pure oil. It provides the moisturizing benefits of an oil but with a lighter feel and added functional benefits (emulsification, texture).
vs. Primary Emulsifiers (e.g., Cetearyl Alcohol & Polysorbate 60): It is not strong enough to form an emulsion alone but is superior at refining texture and boosting the performance of primary emulsifiers.
It is considered a very safe ingredient for topical use.
It has a low risk of skin irritation and is non-comedogenic (unlikely to clog pores).
It is approved for use in cosmetics worldwide and is often found in formulations certified by natural standards (like COSMOS, Ecocert).
In summary, POLYGLYCERYL-2 SESQUICAPARYLATE is a multifunctional, mild, and elegant cosmetic ingredient prized for its ability to improve the texture, stability, and sensory feel of skincare and makeup products, giving them a high-quality, luxurious finish.
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