Walnut Oil is a botanical fixed vegetable oil obtained from the kernels of the walnut, most commonly Juglans regia. It is used in cosmetic and personal-care formulations as an emollient and skin-conditioning ingredient.
Walnut Oil has a characteristic unsaturated fatty acid profile, with linoleic and oleic acids generally representing the major fatty acids. It also contains palmitic and stearic acids and naturally occurring minor lipid components such as tocopherols, phytosterols and other unsaponifiable constituents.
Because of its fluid texture and emollient properties, Walnut Oil can be incorporated into facial oils, creams, lotions, body-care products, haircare formulations, massage oils and other oil-based cosmetic systems.
The commonly referenced cosmetic INCI name for Juglans regia kernel oil is Juglans Regia Seed Oil.
Walnut Oil is a fixed oil obtained from the kernels of walnut fruits. The botanical source most commonly associated with cosmetic Walnut Oil is Juglans regia, commonly known as English or Persian walnut.
The oil consists primarily of triglycerides containing unsaturated and saturated fatty acids. Its composition is influenced by walnut species or cultivar, geographical origin, kernel maturity, extraction method and processing.
Commercial Walnut Oil may be produced through cold pressing, mechanical pressing, extraction and/or subsequent refining.
Cold-pressed and unrefined grades can retain more of the characteristic colour, aroma and naturally occurring minor components of the raw material, while refined grades generally provide greater consistency in colour, odour and physical properties.
Common technical characteristics of Walnut Oil include:
Walnut Oil should be distinguished from walnut shell powder, walnut extract and walnut leaf extract because these are different cosmetic materials with different compositions and applications.
The fatty acid profile of Walnut Oil is one of its important formulation characteristics.
The principal fatty acids include:
The exact fatty acid composition can vary significantly according to walnut cultivar, geographical origin, climate, maturity and extraction process.
For this reason, a single fatty acid percentage should not be treated as universal for every Walnut Oil grade.
For commercial cosmetic formulation, the current fatty acid profile supplied with the selected grade should be used.
Walnut Oil contains naturally occurring minor lipid-soluble constituents in addition to triglycerides.
These may include:
The concentration of these constituents depends on walnut cultivar, origin, extraction method and refining.
Cold-pressed Walnut Oil may retain a greater proportion of naturally occurring minor components than highly refined material.
Specific concentrations should only be stated when supported by the analytical specification of the selected commercial grade.
Walnut Oil is primarily used as an emollient and skin-conditioning ingredient.
Its cosmetic functions include:
Its relatively fluid consistency makes it suitable for formulations where a botanical liquid oil is required.
Walnut Oil can be incorporated into:
It can be used as part of the oil phase of emulsions or in anhydrous cosmetic products.
Walnut Oil can be used in:
Its emollient properties can contribute to a smoother and conditioned hair feel.
Applications include:
Walnut Oil can also be considered for:
For leave-on products, the specific grade and regulatory suitability should be evaluated for the intended market.
Walnut Oil can be incorporated into facial oils, creams, serums and other oil-phase formulations where a plant-derived emollient is desired.
It can be combined with lighter botanical oils, cosmetic esters and other emollients to adjust the final sensory profile.
Because Walnut Oil contains a significant polyunsaturated fraction, oxidative stability should be considered when developing products with extended shelf-life requirements.
Walnut Oil contains substantial unsaturated fatty acids, including polyunsaturated fatty acids. Appropriate oxidative-stability control is therefore important.
Formulators should consider:
Walnut is also a tree-nut source. For cosmetic products intended for sensitive consumers or markets with specific allergen-labelling requirements, the walnut origin and applicable regulatory requirements should be reviewed.
Refined Walnut Oil generally provides a lighter colour, milder odour and more consistent formulation characteristics.
Cold-pressed or unrefined Walnut Oil may have a more pronounced nutty aroma and darker natural colour and may retain more naturally occurring minor constituents.
The appropriate grade depends on the finished product's intended positioning and formulation requirements.
For commercial manufacturing, the processing method, botanical identity, allergen considerations and current Certificate of Analysis should be reviewed before selecting the raw material.
Walnut Oil is a versatile botanical emollient for skincare and haircare formulations.
In skincare, it can be used in facial oils, creams, lotions, body oils and massage formulations.
In haircare, it can be incorporated into hair oils, masks, conditioners and serum-type products.
It can also be blended with other botanical oils to create customized oil-phase systems with different sensory and fatty acid profiles.
Walnut Oil and Walnut Extract are different cosmetic materials.
Walnut Oil is a lipid-rich fixed oil obtained from walnut kernels, while Walnut Extract is produced using an extraction process and may contain a different group of botanical constituents.
Similarly, walnut shell powder is a solid particulate material rather than a fixed oil.
For purchasing, formulation and regulatory documentation, the exact INCI identity should correspond to the raw material supplied.
Walnut Oil is a versatile botanical ingredient for manufacturers developing skincare, haircare and personal-care products.
Key advantages include:
Swapnroop supplies botanical cosmetic ingredients for manufacturers developing skincare, haircare, body-care and personal-care formulations.
Walnut Oil can be considered for facial oils, creams, lotions, body oils, massage products, haircare formulations and other oil-based cosmetic systems.
The selected grade should be evaluated according to botanical identity, processing method, fatty acid profile, oxidative-stability requirements, nut-origin considerations and intended cosmetic application.
Walnut Oil is a fixed botanical oil obtained from walnut kernels, commonly from Juglans regia. It is primarily used in cosmetics as an emollient and skin-conditioning ingredient.
For Juglans regia kernel oil, the commonly referenced INCI name is Juglans Regia Seed Oil.
The commonly referenced CAS number for Walnut Oil is 8024-09-7.
Yes. Walnut Oil is used as a botanical cosmetic ingredient, particularly as an emollient and skin-conditioning oil.
It is used in facial oils, creams, lotions, body oils, massage products, hair oils, hair masks, conditioners and other oil-based cosmetic formulations.
Yes. Walnut Oil can be used as an emollient and skin-conditioning ingredient in a range of skincare formulations.
Yes. It can be incorporated into hair oils, hair masks, conditioners, serums and other oil-based haircare products.
Yes. Cosmetic Walnut Oil is generally supplied as a liquid fixed vegetable oil.
No. Walnut Oil is an oil-phase material and is essentially insoluble in water.
Walnut Oil commonly contains linoleic acid, oleic acid, alpha-linolenic acid, palmitic acid and stearic acid. Exact proportions vary by cultivar and processing.
Yes. Alpha-linolenic acid is naturally present in many Walnut Oil grades, although the exact concentration depends on the walnut source and processing.
Yes. Walnut Oil can naturally contain tocopherols and other unsaponifiable components. Concentrations depend on the grade and processing method.
Walnut Oil is a fixed lipid-rich oil obtained from walnut kernels, while Walnut Extract is produced through an extraction process and can have a different chemical composition.
Yes. Walnut Oil is derived from walnut, a tree nut. The botanical source and applicable cosmetic allergen and labelling requirements should be evaluated for the intended market.
Walnut Oil should generally be stored tightly closed, protected from direct sunlight, excessive heat and unnecessary exposure to oxygen. The storage recommendation for the selected commercial grade should be followed.
| Parameter | Specification |
|---|---|
| Appearance | Colourless to light-yellow liquid or oily liquid |