Lauric Acid
INCI Lauric Acid. Saponified with NaOH it is listed as Sodium Laurate, with KOH as Potassium Laurate. CAS 143-07-7; EC 205-582-1, as CosIng gives them. Also: Dodecanoic acid, C12 fatty acid, Lauric acid 99%.
Published values
| Saponification value | 279–283 mg KOH/g |
| Used by the calculator | 281.0 mg KOH/g (midpoint) |
| SAP for NaOH | 0.2003 g/g |
| Iodine value | ≤ 0.2 g I₂/100 g |
| INS (SAP − IV) | 281 |
| Melting point | — |
| Unsaponifiable matter | — |
A bar made of 100 % Lauric Acid
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 | 95.2 g(94.5–95.8) | 133.5 g(132.5–134.4) |
| 1 kg | 190.3 g(188.9–191.7) | 267.0 g(265.1–268.9) |
| 1 lb (454 g) | 86.3 g(85.7–86.9) | 121.1 g(120.2–122.0) |
| 2 lb (907 g) | 172.6 g(171.4–173.9) | 242.2 g(240.5–243.9) |
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 100 : 0
| Fatty acid | Published range, % | Used | |
|---|---|---|---|
| Capric acid | C10:0 · saturated | ≤ 1 | 1.0 |
| Lauric acid | C12:0 · saturated | ≥ 99 | 99.0 |
| Myristic acid | C14:0 · saturated | ≤ 1 | 1.0 |
Where these numbers come from
Specification table on the product page: acid value, saponification value, iodine value, titre, colour, fatty-acid composition limits.
Brochure PDF (uploaded 2012), fractionated fatty acids table; same limits: AV 278-282, SAP 279-283, IV 0.2 max, titre 42-45 C. Text extracted with pdftotext.
Producer specification for Wilmar WILFARIN LA-1299 (Lauric Acid 99%, vegetable/lauric-oil derived): acid value 278-282 mg KOH/g, saponification value 279-283 mg KOH/g, iodine value 0.2 max (% I2 absorbed = g/100 g), titre 42-45 C, colour 0.2/2 max (Lovibond R/Y), composition C10 1 % max, C12 99 % min, C14 1 % max, others 0.5 % max. As a free fatty acid it neutralises rather than saponifies, so the SAP is essentially equal to the acid value; use it directly for lye calculation. Titre (solidification point) 42-45 C is reported rather than a melting point, so the melting point is blank. The same limits appear in Wilmar's oleochemicals brochure (additional source). INCI and saponified-salt names are the standard CosIng entries (Lauric Acid; Sodium/Potassium Laurate), not re-verified on CosIng in this session.
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