Ethylhexyl Isononanoate is an ester-based cosmetic ingredient used primarily as an emollient and skin-conditioning agent in skincare, body-care, haircare and colour-cosmetic formulations. It is valued for its lightweight, lubricating character and its ability to improve product spreadability and contribute to a smooth skin feel.
Chemically, Ethylhexyl Isononanoate is an ester formed from 2-ethylhexanol and isononanoic acid. It belongs to the fatty-acid ester family and is commonly used in formulations where a light-feeling, oil-compatible emollient is desired.
Ethylhexyl Isononanoate may be considered for facial moisturizers, creams, lotions, serums, makeup products, body-care formulations and selected haircare products. Its performance depends on the commercial grade, concentration and combination of other formulation ingredients.
The INCI name is Ethylhexyl Isononanoate. The commonly referenced CAS number is 71566-49-9. The ingredient is also described chemically as 2-ethylhexyl isononanoate. The supplied material's identity should be verified using its current Certificate of Analysis (COA) and Technical Data Sheet (TDS).
Ethylhexyl Isononanoate is a branched-chain fatty-acid ester used in cosmetic formulations for emolliency and skin conditioning. Its structure combines a 2-ethylhexyl alcohol-derived group with an isononanoate group.
In finished cosmetic products, the ingredient can contribute to lubrication, smooth application and a lightweight emollient feel. It is particularly relevant to formulations where spreadability and sensory characteristics are important.
Ethylhexyl Isononanoate is generally insoluble in water and is normally incorporated into the oil phase of emulsions or suitable anhydrous formulations. A suitable emulsification system is required when it is used in a water-containing product.
It should not be confused with Ethylhexyl Stearate, Ethylhexyl Palmitate, Ethylhexyl Isostearate or Isononyl Isononanoate. These are distinct cosmetic esters with different chemical identities and formulation properties.
| Parameter | Details |
|---|---|
| Product Name | Ethylhexyl Isononanoate |
| INCI Name | Ethylhexyl Isononanoate |
| Chemical Name | 2-Ethylhexyl Isononanoate |
| Alternative Chemical Name | 2-Ethylhexyl 3,5,5-Trimethylhexanoate |
| Chemical Class | Branched-chain fatty-acid ester |
| Chemical Description | Ester of 2-ethylhexanol and isononanoic acid |
| CAS Number | 71566-49-9 |
| EC Number | 275-637-2 |
| Molecular Formula | C₁₇H₃₄O₂ |
| Molecular Weight | Approximately 270.46 g/mol |
| Physical State | Liquid |
| Appearance | Typically clear, colourless to pale-yellow liquid; grade-dependent |
| Odour | Generally mild or nearly neutral; grade-dependent |
| Water Solubility | Generally insoluble |
| Primary Cosmetic Function | Emollient |
| Additional Function | Skin conditioning |
| Product Category | Cosmetic Ingredient |
Identity note: Public chemical records may contain additional identifiers for closely related or differently registered ester materials. Confirm the exact INCI name, CAS number and composition against the documentation for the supplied commercial grade.
Ethylhexyl Isononanoate is primarily used as an emollient. It contributes to the smoothness and softness of the skin feel by providing lubrication in the formulation.
The ingredient can be incorporated into cosmetic products designed to improve the feel of the skin. It is suitable for evaluation in moisturizers, lotions, creams and other skin-conditioning formulations.
Ethylhexyl Isononanoate is commonly selected for formulations that require a lightweight, oil-compatible emollient. The final sensory profile depends on its concentration and the other oils, esters, waxes and conditioning ingredients present.
Its lubricating characteristics can help cosmetic products spread across the application area. This can be useful in facial creams, body lotions, makeup bases and other products where application feel matters.
As a lipophilic ester, Ethylhexyl Isononanoate can be considered for suitable oil phases and anhydrous formulations. Compatibility should be assessed in the actual formulation system.
The ingredient can be evaluated alongside other emollient esters and cosmetic oils to help adjust glide, texture and after-feel. Formulation testing is necessary to establish the most suitable combination and use level.
Ethylhexyl Isononanoate may be evaluated for:
The suitability of Ethylhexyl Isononanoate depends on the finished product's requirements, ingredient compatibility and commercial-grade specifications.
Ethylhexyl Isononanoate is generally incorporated into the oil phase of emulsions or suitable anhydrous products. Follow the processing guidance for the selected grade.
The ingredient is generally insoluble in water. Water-containing formulations require a suitable emulsification system and stability evaluation.
The appropriate use level depends on the required texture, glide, spreadability and after-feel. Determine the concentration through formulation trials rather than assuming one level is suitable for every product type.
Assess compatibility with emulsifiers, fatty alcohols, waxes, cosmetic oils, silicones, pigments, fragrances and other formulation components. Confirm performance in the intended formulation.
If the ingredient is being considered to dissolve or disperse another material, establish compatibility and solubility through testing. Do not assume that it can dissolve every cosmetic ingredient.
Evaluate the finished formulation for appearance, odour, viscosity, phase separation and other relevant changes under appropriate stability conditions.
Finished-product suitability depends on the complete formulation, concentration, application area and intended use. Conduct appropriate safety and compatibility assessments for the final cosmetic product.
Relevant quality checks may include identification, appearance, odour, acid value, density, refractive index and other parameters defined for the commercial grade. Use the current COA and TDS to establish acceptance limits.
Store the material in a suitable, tightly closed container under the conditions recommended for the supplied grade. Protect it from contamination and follow applicable handling procedures.
| Parameter | Ethylhexyl Isononanoate | Ethylhexyl Stearate | Ethylhexyl Palmitate |
|---|---|---|---|
| INCI Name | Ethylhexyl Isononanoate | Ethylhexyl Stearate | Ethylhexyl Palmitate |
| Parent Acid | Isononanoic acid | Stearic acid | Palmitic acid |
| Chemical Structure | Branched-chain fatty-acid ester | Fatty-acid ester | Fatty-acid ester |
| CAS Number | 71566-49-9 | 22047-49-0 | 29806-73-3 |
| Molecular Formula | C₁₇H₃₄O₂ | C₂₆H₅₂O₂ | C₂₄H₄₈O₂ |
| Primary Cosmetic Function | Emollient | Emollient | Emollient |
| Selection Considerations | Lightweight sensory profile, compatibility and grade | Texture, emolliency and grade | Texture, emolliency and grade |
These esters are not interchangeable by name alone. Selection should be based on the desired sensory profile, formulation requirements, ingredient identity and commercial-grade specifications.
Swapnroop supports cosmetic ingredient procurement requirements for manufacturers and formulation businesses developing skincare, body-care, haircare and colour-cosmetic products.
Ethylhexyl Isononanoate can be considered where an oil-compatible emollient ester is required to support skin conditioning, lubrication and formulation feel. Buyers should confirm the supplied material's identity, grade, specification limits, packaging and batch documentation before commercial use.
For production applications, evaluate the ingredient in the complete formulation and verify compatibility, stability and finished-product performance.
Ethylhexyl Isononanoate is a branched-chain fatty-acid ester used in cosmetic formulations primarily as an emollient and skin-conditioning ingredient.
The INCI name is Ethylhexyl Isononanoate.
The commonly referenced CAS number is 71566-49-9.
Its molecular formula is C₁₇H₃₄O₂, with a molecular weight of approximately 270.46 g/mol.
It is used primarily as an emollient in creams, lotions, facial moisturizers, makeup products and other cosmetic formulations.
No. It is generally insoluble in water and is usually incorporated into the oil phase or a suitable anhydrous formulation.
Yes. Its primary recognized cosmetic function is emolliency, supporting smoothness and softness in the skin feel of finished products.
It can be evaluated in creams and lotions when the oil phase and emulsification system are designed to accommodate it. Finished-product stability should be assessed.
No. Ethylhexyl Isononanoate is derived from isononanoic acid, while Ethylhexyl Stearate is derived from stearic acid. They have different chemical identities and properties.
| Parameter | Specification |
|---|---|
| Appearance | Colourless to light-yellow liquid or oily liquid |