Palm Kernel Oil: The Complete Guide for Soap Makers and Formulators

Palm kernel oil is the soap maker's other palm oil — not the orange, carotenoid-rich red palm oil pressed from the fruit pulp, but the hard white oil pressed from the seed inside that fruit. It is the lauric-acid-heavy partner in the traditional West African soap formula: red palm oil for palmitic-acid hardness and colour, palm kernel oil for lauric-acid lather. For formulators new to either, understanding the distinction matters because the two oils are used very differently and produce very different results in formulation. This guide covers everything a soap maker or cosmetic formulator needs to know about palm kernel oil. For a complete guide to using it in DIY recipes, see Palm Kernel Oil – Ultimate DIY Guide and Recipes. For bulk and wholesale quantities, see Baraka Bulk and Wholesale.

What Palm Kernel Oil Is

Palm kernel oil is pressed from the hard kernel — the seed — inside the fruit of the oil palm tree, Elaeis guineensis. The oil palm produces a small, dense drupe: a fleshy orange pulp (the source of red palm oil) surrounding a hard shell, which in turn contains a hard white kernel. That kernel is the source of palm kernel oil.

At room temperature, palm kernel oil is a hard white solid — similar in appearance to refined coconut oil, and similar in function. It has a mild, faintly nutty scent and a clean white colour with no significant carotenoid pigmentation. This distinguishes it immediately from red palm oil, which is deeply orange and strongly scented. For a complete guide to red palm oil and how it differs from palm kernel oil in formulation, see Red Palm Oil for DIY Skincare: The Complete Guide.

Palm kernel oil melts at approximately 24–26°C — similar to coconut oil — and behaves as a liquid oil above this temperature. In soap making and cosmetic formulation, it is treated as a solid base oil that contributes hardness, lather, and a firm texture to finished products.

Fatty Acid Profile

Palm kernel oil's fatty acid profile is what makes it valuable for soap making and as a hardness agent in cosmetic formulations:

• Lauric acid (C12:0): approximately 48–55% — the primary fatty acid; contributes hard, stable lather and bar hardness in soap
• Myristic acid (C14:0): approximately 14–18% — contributes additional hardness and lather alongside lauric acid
• Oleic acid (omega-9): approximately 12–16% — the primary conditioning fatty acid; higher than in coconut oil, which is part of why PKO-based soaps are considered slightly gentler
• Palmitic acid (C16:0): approximately 8–10% — contributes additional bar hardness
• Linoleic acid (omega-6): approximately 2–4% — small amount, contributes to skin compatibility
• Capric and caprylic acid (C8, C10): approximately 5–7% combined — contribute quick-breaking, bubbly lather

The combined lauric and myristic acid content of approximately 62–73% total saturated fatty acids is what gives palm kernel oil its characteristic hardness and lather properties. For comparison, coconut oil has approximately 65–75% combined lauric and myristic acid — which is why the two oils perform similarly but not identically in formulation.

The Key Soap Making Number: SAP Value

The saponification value of palm kernel oil is approximately 0.156 (NaOH) for cold-process soap making. This is the lye amount in grams required to fully saponify 1 gram of palm kernel oil.

Comparing common soap oils:

• Coconut oil: approximately 0.190 NaOH
• Palm kernel oil: approximately 0.156 NaOH
• Red palm oil: approximately 0.141 NaOH
• Shea butter: approximately 0.128 NaOH
• Olive oil: approximately 0.134 NaOH

Palm kernel oil's SAP value is significantly higher than soft oils like shea and olive, and lower than coconut oil. Always input the palm kernel oil-specific SAP value into your lye calculator rather than using a generic palm oil or coconut oil value. Using the wrong SAP value will result in a lye-heavy or lye-light batch. For a complete guide to simple shea butter soap making, see How Do I Make Simple DIY Shea Butter Soap?

Palm Kernel Oil vs Coconut Oil in Soap Making

This is the comparison that matters most for formulators choosing between the two oils. Both are lauric-acid-dominant, both produce hard bars with high lather, and both can be drying at high percentages — but they are not identical in performance.

Lauric acid content: Coconut oil is slightly higher — 50–55% vs 48–55% for palm kernel oil. The difference is modest but means coconut oil typically produces a slightly harder, more aggressively lathering bar at equivalent percentages.

Oleic acid content: Palm kernel oil is higher in oleic acid (12–16% vs approximately 6–8% for coconut oil). This is why palm kernel oil-based soaps are sometimes described as slightly more conditioning than coconut oil-based soaps at equivalent percentages.

SAP value: Coconut oil is significantly higher (0.190 vs 0.156). This means coconut oil requires considerably more lye to saponify per gram — the two oils cannot be directly substituted at equal weights without recalculating the lye amount.

Practical conclusion: Palm kernel oil is a gentler, slightly softer alternative to coconut oil for soap makers who find coconut oil too drying in finished bars. For formulators who want maximum lather and hardness, coconut oil is the stronger choice. For formulators who want the functional benefits of a lauric-acid oil with a slightly more conditioning outcome, palm kernel oil is the better choice. For a detailed head-to-head comparison, see Palm Kernel Oil vs Coconut Oil: What the Difference Actually Is.

Using Palm Kernel Oil in Soap Formulas

Usage rate: 20–35% in cold-process soap. Below 20%, the contribution to lather and hardness is limited. Above 40–45%, the high lauric acid content can make the finished bar drying. For a balanced bar, 25–30% palm kernel oil alongside a softer conditioning base is the standard formulation range.

Superfat: Superfat at 5–8% to offset the drying potential of the high lauric acid content. A 5% superfat is standard for balanced skin bars; some formulators superfat to 8% for bars designed for sensitive or dry skin.

Combination with red palm oil: The traditional West African soap formula combines red palm oil (for palmitic acid hardness and warm colour) with palm kernel oil (for lauric acid lather). A common starting formula: 30–40% red palm oil + 25–30% palm kernel oil + 30–40% soft conditioning oil (shea butter or olive oil). This produces a hard, well-lathering bar with a warm golden colour and good skin feel.

Lather quality: Palm kernel oil produces a stable, dense lather — more creamy and less bubbly than coconut oil at equivalent percentages. Formulators who want a denser, conditioning lather rather than a fast-breaking bubbly lather often prefer palm kernel oil over coconut oil for this reason. For sourcing guidance specific to soap making, see How to Source Shea Butter for Soap Making.

Cosmetic Formulation Uses Beyond Soap

Palm kernel oil is not exclusively a soap ingredient. In cosmetic formulation:

Solid lotion bars and body butters: At 10–20% in a shea butter-based body butter, palm kernel oil adds firmness without dominating the formulation. It raises the melting point of the finished product, which is useful for warm-climate formulations or products that need to hold shape at higher temperatures.

Lip balms and solid balms: Palm kernel oil's high lauric acid content and solid texture at room temperature make it useful as a hardness agent in lip balms and solid balms where coconut oil would also be appropriate. At 15–25%, it contributes structure without the drying of pure coconut oil.

Hair conditioning formulations: Palm kernel oil is used in solid hair conditioning bars and pre-wash hair treatment formulations. Its lauric acid content penetrates the hair shaft more readily than longer-chain saturated acids, making it useful as a hair conditioning ingredient in anhydrous formulations.

For a complete overview of the best ingredients for DIY skincare and formulation, see What Are the Best Ingredients for DIY Skincare?

Sourcing and Availability

Baraka's palm kernel oil is sourced through cooperative relationships in West Africa, traditionally processed without chemical solvents or industrial refinement. Chain-of-custody documentation is available on request. For the full account of Baraka's cooperative sourcing and social impact, see Baraka's Social and Environmental Impact Report. For bulk and wholesale quantities for soap making or cosmetic formulation, see Baraka Bulk and Wholesale. Browse the complete DIY Ingredients Collection and Butters Collection.

Frequently Asked Questions

What is palm kernel oil?

Palm kernel oil is pressed from the hard kernel (seed) inside the fruit of the oil palm tree — Elaeis guineensis. It is a hard, white, solid fat at room temperature with approximately 48–55% lauric acid, making it functionally similar to coconut oil in soap making and cosmetic formulation. It is distinct from red palm oil, which is pressed from the fleshy fruit pulp and has a very different fatty acid profile.

What is the saponification value of palm kernel oil?

Palm kernel oil has a SAP value of approximately 0.156 (NaOH) for cold-process soap making — lower than coconut oil (0.190) but significantly higher than soft oils like olive or shea. Always use the palm kernel oil-specific value in your lye calculator rather than assuming it matches coconut oil or red palm oil values.

How does palm kernel oil compare to coconut oil in soap making?

Both are high in lauric acid and both contribute hard bars and high lather. Palm kernel oil has slightly lower lauric acid, higher oleic acid, and a lower SAP value than coconut oil. It produces a slightly softer bar and slightly less aggressive lather — often described as gentler in finished soap. The two oils are frequently used interchangeably or in combination.

What percentage of palm kernel oil should I use in soap?

20–35% in cold-process soap. Below 20%, its contribution to lather and hardness is limited. Above 40–45%, the high lauric acid content can make the bar drying. For a balanced bar, 25–30% alongside a softer conditioning oil base — shea butter or olive oil — superfatted at 5–8%, is the standard formulation.

What makes palm kernel oil produce hard soap bars?

The hardness comes from its high saturated fat content — approximately 48–55% lauric acid combined with 14–18% myristic acid, totalling approximately 62–73% saturated fatty acids. Saturated fatty acids form harder soap molecules when saponified than unsaturated fatty acids do.

Is palm kernel oil sustainable?

Sustainability depends entirely on sourcing. Industrial Southeast Asian palm oil production is associated with deforestation. West African production — where the oil palm is native — typically involves small-scale traditional processing. Baraka's palm kernel oil is sourced through cooperative relationships in West Africa with chain-of-custody documentation available on request.

How does palm kernel oil differ from red palm oil?

Red palm oil is pressed from the fleshy orange fruit pulp — semi-solid, primarily palmitic and oleic acid, deeply orange from carotenoids. Palm kernel oil is pressed from the hard seed — a white solid, primarily lauric acid, with no carotenoid colour. They are not interchangeable in soap or cosmetic formulation.

Can palm kernel oil be used in cosmetic formulations beyond soap?

Yes — in solid lotion bars, body butters at 10–20% for firmness, lip balms, and hair conditioning formulations. Its high lauric acid content and solid texture make it useful as a hardness agent in anhydrous formulations where coconut oil would also be appropriate.

Does palm kernel oil need to be refined for cosmetic use?

Unrefined palm kernel oil has a mild, faintly nutty scent and a white to off-white colour. It does not significantly colour finished products. For most cosmetic and soap making applications, unrefined palm kernel oil is appropriate. Refined palm kernel oil is used where even mild scent is undesirable.

Where does Baraka palm kernel oil come from?

Baraka's palm kernel oil is sourced through cooperative relationships in West Africa, traditionally processed without chemical solvents or industrial refinement, with chain-of-custody documentation available on request. For bulk and wholesale quantities, see Baraka Bulk and Wholesale.

About the Author

Wayne Dunn is the founder of Baraka Impact and a former Professor of Practice in Sustainability at McGill University. He holds an M.Sc. in Management from Stanford and has spent over 15 years working directly with cooperative relationships in West Africa to source traditionally made butters, oils, and soaps — including palm kernel oil, one of the most technically specific ingredients in the range. He shares DIY skincare recipes and ingredient guides designed to be made at home with real ingredients — and sourced with full transparency about where they come from.