Arachis Oil (Peanut Oil)
INCI Arachis Hypogaea Oil. Saponified with NaOH it is listed as Sodium Peanutate, with KOH as Potassium Peanutate. CAS 8002-03-7; EC 232-296-4, as CosIng gives them. Also: Peanut oil, Groundnut oil, Arachis hypogaea seed oil, Earth-nut oil.
Published values
| Saponification value | 187–196 mg KOH/g |
| Used by the calculator | 191.5 mg KOH/g (midpoint) |
| SAP for NaOH | 0.1365 g/g |
| Iodine value | 77–107 g I₂/100 g |
| INS (SAP − IV) | 100 |
| Melting point | — |
| Unsaponifiable matter | ≤ 1 % |
Soapmaking books print about 0.136 g NaOH per g (median of 7 books), which agrees with ours to within 2 %.
A bar made of 100 % Arachis 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 | 64.8 g(63.3–66.4) | 91.0 g(88.8–93.1) |
| 1 kg | 129.7 g(126.6–132.7) | 181.9 g(177.7–186.2) |
| 1 lb (454 g) | 58.8 g(57.4–60.2) | 82.5 g(80.6–84.5) |
| 2 lb (907 g) | 117.7 g(114.9–120.4) | 165.0 g(161.2–168.9) |
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 18 : 82
| Fatty acid | Published range, % | Used | |
|---|---|---|---|
| Lauric acid | C12:0 · saturated | 0–0.1 | 0.1 |
| Myristic acid | C14:0 · saturated | 0–0.1 | 0.1 |
| Palmitic acid | C16:0 · saturated | 5–14 | 9.5 |
| Palmitoleic acid | C16:1 | 0–0.2 | 0.1 |
| Stearic acid | C18:0 · saturated | 1–4.5 | 2.8 |
| Oleic acid | C18:1 | 35–80 | 57.5 |
| Linoleic acid | C18:2 | 4–43 | 23.5 |
| α-Linolenic acid | C18:3 n-3 | 0–0.5 | 0.3 |
| Arachidic acid | C20:0 · saturated | 0.7–2 | 1.4 |
| Gadoleic acid | C20:1 | 0.7–3.2 | 2.0 |
| Behenic acid | C22:0 · saturated | 1.5–4.5 | 3.0 |
| Erucic acid | C22:1 | 0–0.6 | 0.3 |
| Lignoceric acid | C24:0 · saturated | 0.5–2.5 | 1.5 |
Guides that discuss it
Where these numbers come from
Verbatim mirror of the FAO file CXS_210e.pdf; the official FAO link was Cloudflare-gated at retrieval. Table 1 (Section 3.1) = mandatory GLC fatty-acid ranges, % of total fatty acids, ND = not detectable (<=0.05%). Table 2 (Appendix 'Other quality and composition factors') gives saponification value, iodine value (Wijs) and unsaponifiable matter of CRUDE oils; the Appendix is explicitly ADVISORY (a product not meeting it may still conform). This print predates the 2021-2025 amendments; the 2024 additions (avocado, camellia seed, sacha inchi, high-oleic soya bean) are not included.
JP XVIII 'Peanut Oil': specific gravity (d25/25) 0.909-0.916; congealing point of the fatty acids 22-33 C (no SAP/IV in this monograph).
Fatty acids from CXS 210 Table 1 (mandatory GLC ranges, % of total fatty acids; 'ND' = not detectable, <=0.05%, entries that are ND-only are omitted; C17:0, C17:1, C20:2, C22:2 and C24:1 columns omitted because they are outside the acids this database records). The saponification value, the iodine value and the unsaponifiable share from Appendix Table 2 (crude oils; ADVISORY, not mandatory; unsaponifiable converted from g/kg). No 'typical' values are printed in the standard, so none are given. Appendix composition characteristic: arachidic and higher fatty acids should not exceed 48 g/kg. Ph. Eur. 12 refined peanut oil ranges (Heess sheet): palmitic 5.0-14.0, stearic 1.3-6.5, oleic 35.0-76.0, linoleic 8.0-43.0, linolenic max 0.6, arachidic 0.5-3.0, eicosenoic 0.5-3.0, behenic 1.0-5.0, erucic max 0.5, lignoceric 0.5-3.0 %.
This record is part of the open ingredient database (ODbL), which you can download as CSV or JSON. Found an error or a better primary source? Corrections with a link to the document are welcome at support@soapformulator.com.