Óleo de semente de figo-da-índia
Nome INCI: Opuntia Ficus-Indica Seed Oil. Também: Óleo de figo-da-índia.
Valores publicados
| Índice de saponificação | 160,2–186,63 mg KOH/g (típico 186,63) |
| Usado pela calculadora | 186,6 mg KOH/g (típico) |
| SAP para NaOH | 0,1330 g/g |
| Índice de iodo | 101,35–130,5 g I₂/100 g (típico 130,5) |
| INS (SAP − índice de iodo) | 56 |
| Ponto de fusão | — |
| Matéria insaponificável | 1,19 % |
Uma barra 100 % óleo de semente de figo-da-índia
Qualidades convencionais somadas a partir dos grupos de ácidos graxos; uma barra de um só óleo é um ponto de referência, não uma receita.
Perfil de ácidos graxos
| Ácido graxo | Intervalo publicado, % | Usado | |
|---|---|---|---|
| Ácido palmítico | C16:0 · saturados | 11,9–13,83 (típico 11,9) | 11,9 |
| Ácido palmitoleico | C16:1 | 0,6–0,68 (típico 0,6) | 0,6 |
| Ácido esteárico | C18:0 · saturados | 3,4–3,79 (típico 3,4) | 3,4 |
| Ácido oleico | C18:1 | 15,71–21,3 (típico 21,3) | 21,3 |
| Ácido linoleico | C18:2 | 60,8–64,43 (típico 60,8) | 60,8 |
| Ácido α-linolênico | C18:3 n-3 | 0,2–0,45 (típico 0,2) | 0,2 |
| Ácido araquídico | C20:0 · saturados | 0,2–0,34 (típico 0,2) | 0,2 |
| Ácido gadoleico | C20:1 | 0,2–0,21 (típico 0,2) | 0,2 |
| Ácido behênico | C22:0 · saturados | 0,22 | 0,2 |
| Ácido lignocérico | C24:0 · saturados | 0,14 | 0,1 |
De onde vêm estes números
As notas com fonte abaixo, e os títulos dos documentos que elas citam, são mantidos no idioma original. Uma citação traduzida não pode ser localizada, e um resumo técnico traduzido não é mais o resumo que foi conferido com o documento.
Cold-pressed oil from Sidi Ifni seed: oil yield 6.5 +/- 0.5 %, saponification value 186.63, iodine value 130.5, unsaponifiable matter 1.19 %, refractive index, density, acidity, peroxide value, E232/E270, and the full fatty-acid composition with SFA/MUFA/PUFA totals.
Table 1 fatty-acid composition of a commercial cold-pressed prickly pear seed oil. Source of the fatty-acid maxima and of the behenic and lignoceric entries. No saponification or iodine value reported.
Yemeni seed, Soxhlet extract: saponification 160.20, iodine 101.35, acid value 1.16, peroxide 1.35, and oil yields of 13 % (Soxhlet), 5.4 % (maceration) and 5 % (ultrasound). Source of the saponification and iodine minima only; the same table's refractive index of 1.132 is physically impossible for an oil, so the rest of it is not used.
The 'typical' column and the constants are Zine, Gharby and El Hadek 2013 (Biosciences Biotechnology Research Asia 10(1):99-105), oil cold-pressed on industrial equipment (IBG Monforts Oekotec) from seed bought at Sidi Ifni in southern Morocco in June 2012: saponification value 186.63 +/- 0.5 mg KOH/g, iodine value 130.5 +/- 0.3 g I2/100 g, unsaponifiable matter 1.19 +/- 0.2 %, refractive index 1.461 +/- 0.001 and density 0.906 +/- 0.001 at 20 C, acidity 0.56 %, peroxide value 3.5 +/- 0.5 meq O2/kg, E232 1.72, E270 0.31. Fatty acids: palmitic 11.9, palmitoleic 0.6, stearic 3.4, oleic 21.3, linoleic 60.8, alpha-linolenic 0.2, arachidic 0.2, eicosenoic 0.2 %, 98.6 % of the total. WHY IT COSTS WHAT IT COSTS, because a maker will meet the price before they meet the oil: the same paper reports that the seed makes up to 15 % of the fruit's mass and that cold pressing recovered only 6-7 % oil from that seed, against a literature figure of 10-15 % oil in whole seed. At the pressed yield a tonne of prickly pears gives on the order of ten kilograms of oil, and the seed has to be separated from the pulp before any of that happens. The plant is not scarce; the oil is, and that is arithmetic rather than marketing. Min/max on the fatty acids, and the behenic and lignoceric entries, come from Table 1 of Antioxidants 2025, 14(6):661, a commercial cold-pressed oil: palmitic 13.83, C17:0 0.05, stearic 3.79, arachidic 0.34, behenic 0.22, lignoceric 0.14, palmitoleic 0.68, oleic 15.71, eicosenoic 0.21, linoleic 64.43, alpha-linolenic 0.45, C20:3 n-3 0.18 % (the last has no key in this schema and is omitted). That paper publishes no saponification or iodine value. A THIRD PAPER DISAGREES SHARPLY and sets the two minima: Thamer and Alshargabi 2026 (Sci. Rep. 16:13812), Yemeni seed from Khawlan, Sana'a, Soxhlet-extracted, gives saponification 160.20 +/- 0.02 mg KOH/g and iodine 101.35 +/- 0.21 g I2/100 g. Those are far below the Moroccan figures, its composition is reported as a GC-MS peak list rather than a fatty-acid profile so it cannot be checked against itself, and the same table prints a refractive index of 1.132, which no vegetable oil has - they sit near 1.47. That whole table is therefore treated as indicative only and the Moroccan measurements are used as the typicals, which is why 'typical' equals 'max' in both fields rather than sitting in the middle. FOR SOAP: a 61-64 % linoleic oil with almost no linolenic, so it behaves like a soft, fast-oxidising superfat rather than a base oil, and the low saturate content means it contributes nothing to hardness. The recorded composition implies about 193 mg KOH/g by stoichiometry, 3 % above Zine's measured 186.63 and 20 % above the Yemeni figure - a further reason to treat the latter as suspect. Melting point not reported (liquid at room temperature). INCI not verified against CosIng in this session, so left null.
Este registro faz parte do banco de dados aberto de ingredientes (ODbL). Encontrou um erro ou uma fonte primária melhor? O conjunto de dados está no GitHub; correções com link para um documento são bem-vindas.