Mustardseed Oil
Also: Mustard oil, Sinapis alba / Brassica juncea / Brassica nigra seed oil.
Published values
| Saponification value | 168–184 mg KOH/g |
| Used by the calculator | 176.0 mg KOH/g (midpoint) |
| SAP for NaOH | 0.1255 g/g |
| Iodine value | 92–125 g I₂/100 g |
| INS (SAP − IV) | 68 |
| Melting point | — |
| Unsaponifiable matter | ≤ 1.5 % |
Soapmaking books print about 0.123 g NaOH per g (median of 3 books). Why book figures and ours can differ.
A bar made of 100 % Mustardseed 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 | 59.6 g(56.9–62.3) | 83.6 g(79.8–87.4) |
| 1 kg | 119.2 g(113.8–124.6) | 167.2 g(159.6–174.8) |
| 1 lb (454 g) | 54.1 g(51.6–56.5) | 75.8 g(72.4–79.3) |
| 2 lb (907 g) | 108.1 g(103.2–113.0) | 151.7 g(144.8–158.6) |
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 | |
|---|---|---|---|
| Myristic acid | C14:0 · saturated | 0–1 | 0.5 |
| Palmitic acid | C16:0 · saturated | 0.5–4.5 | 2.5 |
| Palmitoleic acid | C16:1 | 0–0.5 | 0.3 |
| Stearic acid | C18:0 · saturated | 0.5–2 | 1.3 |
| Oleic acid | C18:1 | 8–23 | 15.5 |
| Linoleic acid | C18:2 | 10–24 | 17.0 |
| α-Linolenic acid | C18:3 n-3 | 6–18 | 12.0 |
| Arachidic acid | C20:0 · saturated | 0–1.5 | 0.8 |
| Gadoleic acid | C20:1 | 5–13 | 9.0 |
| Behenic acid | C22:0 · saturated | 0.2–2.5 | 1.4 |
| Erucic acid | C22:1 | 22–50 | 36.0 |
| Lignoceric acid | C24:0 · saturated | 0–0.5 | 0.3 |
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.
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. High erucic acid (C22:1 22.0-50.0 %) oil; C24:1 (nervonic) ND-... omitted (outside key list); INCI not asserted (several botanical sources).
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.