Plum Kernel Oil
INCI Prunus Domestica Seed Oil. CAS 90082-87-4; EC 290-179-3, as CosIng gives them. Also: Plum seed oil, Prunus domestica kernel oil, Prunus domestica seed oil.
Published values
| Saponification value | 150.86–198 mg KOH/g |
| Used by the calculator | 174.4 mg KOH/g (midpoint) |
| SAP for NaOH | 0.1243 g/g |
| Iodine value | 98.04–102.97 g I₂/100 g |
| INS (SAP − IV) | 74 |
| Melting point | — |
| Unsaponifiable matter | 0.87–0.94 % |
A bar made of 100 % Plum Kernel Oil
Conventional qualities summed from the fatty-acid groups; a single-oil bar is a reference point, not a recipe.
How much lye
| Oil | NaOH | KOH |
|---|---|---|
| 500 g | 59.1 g(51.1–67.0) | 82.9 g(71.7–94.1) |
| 1 kg | 118.1 g(102.2–134.1) | 165.7 g(143.3–188.1) |
| 1 lb (454 g) | 53.6 g(46.3–60.8) | 75.2 g(65.0–85.3) |
| 2 lb (907 g) | 107.2 g(92.7–121.6) | 150.3 g(130.0–170.6) |
For this oil alone at 5 % superfat, with pure sodium hydroxide (NaOH) or pure potassium hydroxide (KOH); in brackets, across the published range of its saponification value. KOH is usually sold at 90 %: divide by 0.9. For a whole recipe, open the calculator.
Fatty-acid profile
Saturated : unsaturated 7 : 93
| Fatty acid | Published range, % | Used | |
|---|---|---|---|
| Palmitic acid | C16:0 · saturated | 5.16–5.84 | 5.5 |
| Palmitoleic acid | C16:1 | 0.88–0.96 | 0.9 |
| Stearic acid | C18:0 · saturated | 1.15–2.14 | 1.6 |
| Oleic acid | C18:1 | 65.94–67.98 | 67.0 |
| Linoleic acid | C18:2 | 24.47–25.49 | 25.0 |
| α-Linolenic acid | C18:3 n-3 | 0.053–0.097 | 0.1 |
| Arachidic acid | C20:0 · saturated | 0.053–0.093 | 0.1 |
| Erucic acid | C22:1 | 0.01–0.01 | 0.0 |
| Lignoceric acid | C24:0 · saturated | ≤ 0.01 | 0.0 |
Where these numbers come from
Full-text PDF (doi 10.31545/intagr/210658). Table 2 = physicochemical properties (SAP, IV, unsaponifiable matter, RI, density, PV); Table 3 = fatty-acid profile for OH, PSO and SFT oils.
Saponification values by extraction solvent (180.00-198.00 mg KOH/g), acid values and refractive indices; used for the upper bound of the saponification value.
Abstract only; multi-kernel ranges (SAP 170-195, IV 95-135, unsaponifiable 0.93-1.59 %) quoted in notes for context, not used for field values.
Primary source (Stryjecka & Cymerman 2026, Int. Agrophysics) characterised oil from kernels of a single Polish cultivar ('Diana', kernel oil content 30.01 %) extracted three ways: n-hexane (OH), cold pressing (PSO) and supercritical CO2 (SFT). Table 2 gives saponification value 150.86 (OH), 162.16 (PSO), 165.26 (SFT) mg KOH/g; iodine value 98.04, 99.44, 102.97 g I2/100 g (AOCS Cd 1-25); unsaponifiable matter 0.87, 0.93, 0.94 %; refractive index (40 C) 1.4437-1.4475; density (24 C) 0.84-0.92; peroxide value 1.15-1.24 meq O2/kg. Table 3 fatty acids (% of total, 13 acids detected, three methods) are the min/max above; C17:1 heptadecenoic 0.088-0.12 % goes here (not a field); lignoceric (C24:0) 0.01 % was found only in the hexane oil ('nb' = not detected in PSO/SFT), hence only a max is given; erucic 0.01 % in all three. The saponification value max 198.0 comes from the additional source Savic et al. 2020 (Biomolecules 10:294; Serbian kernels from Osecina, 50 g extractions) which reports SAP by extraction solvent: n-hexane 198.00, n-heptane 184.00, ethyl acetate 188.00, chloroform:methanol 193.00, acetone 180.00 mg KOH/g, plus acid value 1.41-2.81 mg KOH/g and RI 1.47-1.48; it reports no iodine value, no unsaponifiable matter and no quantitative fatty-acid table in the fetched text. The saponification value therefore spans 150.86-198.0 across the two papers (cultivar, origin and solvent dependent); no 'typical' is given because neither document prints a single mean. Ozcan, Unver & Arslan 2015 (QAS&CF 7(2), abstract only) report for a set of fruit kernels/seeds including plum a saponification number range of 170-195, iodine values 95-135 and unsaponifiable matter 0.93-1.59 %, and a plum RI of 1.478 (20 C); these are not plum-specific except the RI and are given here for context only. Melting point: not reported by any source opened (liquid oil). INCI name from CosIng.
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