Palm kernel stearin (PKS) is the solid fraction obtained from the fractionation of palm kernel oil (PKO), which is extracted from the kernel (seed) of the oil palm fruit, Elaeis guineensis. Palm kernel oil is distinct from palm oil — while palm oil comes from the fleshy mesocarp of the palm fruit, palm kernel oil is extracted from the inner kernel or seed.
Fractionation is the process of separating an oil or fat into its component fractions based on differences in melting point and crystallisation behaviour. When palm kernel oil is cooled under controlled conditions, the higher-melting-point triglycerides crystallise first and can be separated by filtration or centrifugation, yielding palm kernel stearin (the solid fraction) and palm kernel olein (the liquid fraction).
Palm kernel stearin has a melting point typically in the range of 30-35 degrees Celsius and is characterised by a high lauric acid content (approximately 46-52%), making it chemically similar to coconut oil but with a sharper melting profile.
The fatty acid composition includes lauric acid (C12:0, approximately 48%), myristic acid (C14:0, approximately 17%), palmitic acid (C16:0, approximately 9%), oleic acid (C18:1, approximately 12%), and caprylic/capric acids (approximately 8%). This composition gives PKS a firm, brittle texture at room temperature with a clean, rapid melt — making it particularly valuable in confectionery applications.
The primary food application of palm kernel stearin is in confectionery coatings, chocolate alternatives (compound chocolate), and cocoa butter equivalents (CBEs). Its sharp melting profile delivers the desired snap, gloss, and melt-in-the-mouth sensation in confectionery products without the cost of cocoa butter. PKS is also used in ice cream coatings, filled wafer products, and as a hard fat in margarine and spread formulations.
In the oleochemical industry, palm kernel stearin is a feedstock for the production of fatty acids, fatty alcohols, and their derivatives — used in soaps, detergents, surfactants, personal care products, and industrial chemicals.
The major producers of palm kernel stearin are located in Malaysia and Indonesia, where integrated palm kernel crushing and fractionation facilities process the kernels from oil palm fruit. The product is typically supplied in the form of blocks, flakes, or in bulk liquid (heated) form. Food-grade palm kernel stearin is available in both conventional and RSPO-certified sustainable forms. Modern fractionation technology allows precise separation to achieve specific melting point ranges and fatty acid compositions tailored to individual customer requirements.
Historically, palm kernel products have been traded internationally since the 19th century, initially exported from West Africa to European soap and margarine manufacturers. The development of modern fractionation technology in the 1960s and 1970s enabled the production of precisely specified fractions like palm kernel stearin, opening up new applications in confectionery and specialty fat markets.
Beyond confectionery, palm kernel stearin is used in the cosmetics industry as a structuring agent in lipsticks, creams, and other solid formulations. In the pharmaceutical industry, it serves as an excipient in suppository bases and controlled-release drug delivery systems. Industrial applications include candle making (where PKS is blended with other waxes), soap manufacturing, and as a feedstock for oleochemical derivatives.
Interesting facts include: palm kernel stearin is one of the few plant-based fats that can closely replicate the melting behaviour of cocoa butter; the lauric acid content gives it natural antimicrobial properties; and the global confectionery industry is the largest consumer of palm kernel stearin, with demand driven by the growth of compound chocolate and confectionery coating markets in developing countries.