Óleo de crambe
Nome INCI: Crambe Abyssinica Seed Oil. Também: Óleo de Abissínia.
Calcular uma barra 100 % óleo de crambe
Isso é estequiometria sobre uma composição medida, não um palpite, e é determinado com uma precisão mais ou menos igual à de um valor publicado: na verificação com os 35 óleos do Codex em que os dois campos vêm da mesma norma, o método tem erro mediano de 0,90 % e percentil 90 de 2,74 %, sem viés significativo. A página de fórmulas mostra o cálculo. Se você tem um certificado de análise do seu lote, insira o valor medido na calculadora e esta estimativa é deixada de lado.
Valores publicados
| Índice de saponificação | não publicado |
| Derivado da composição | 169,8 ± 3 % mg KOH/g |
| Usado pela calculadora | 169,8 mg KOH/g (derivado) |
| SAP para NaOH | 0,1211 g/g |
| Índice de iodo | 88 g I₂/100 g |
| INS (SAP − índice de iodo) | 82 |
| Ponto de fusão | — |
| Matéria insaponificável | — |
Uma barra 100 % óleo de crambe
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 | 3,4 | 3,4 |
| Ácido esteárico | C18:0 · saturados | 1,1 | 1,1 |
| Ácido oleico | C18:1 | 17,8 | 17,8 |
| Ácido linoleico | C18:2 | 6,1 | 6,1 |
| Ácido α-linolênico | C18:3 n-3 | 2,8 | 2,8 |
| Ácido araquídico | C20:0 · saturados | 1,7 | 1,7 |
| Ácido gadoleico | C20:1 | 6,7 | 6,7 |
| Ácido behênico | C22:0 · saturados | 2,14–3,7 (típico 3,7) | 3,7 |
| Ácido erúcico | C22:1 | 56,23–63,77 (típico 56,7) | 56,7 |
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.
Tabela 1 physical and chemical parameters of crambe oil (density, kinematic viscosity, iodine value 88 gI2/100g, acid value 3.64 mg KOH/g, water content); Tabela 2 fatty-acid composition (%). The journal's own site, nucleus.feituverava.com.br, did not respond on 2026-09-21, so the DOI target could not be opened; the Dialnet copy of the same article PDF was read instead.
Crambe variety FMS 1 Brilhante, Planaltina DF, 2022 safrinha: oil content 35.13 %, erucic acid 56.23-56.3 %, acidity 0.42 %, Rancimat oxidative stability 25.46 h. Its Tabela 2 extracts with misaligned columns and was not transcribed acid-by-acid; only the erucic figure, which the running text and conclusion both state, is used.
Full text is paywalled; only the abstract deposited with Crossref was read. It supplies C22:1 63.77 %, C22:0 2.14 %, seed oil content ~30 %, beta-sitosterol 51.93 % of sterols, tocopherols 7.67/125.04/3.99 mg/kg, Rancimat induction 8.83 h at 110 C, DSC peak -20.94 C. It states that a saponification value was determined but does not print it.
ERUCIC ACID IS THE POINT OF THIS OIL and the figure here is measured, not inherited: Tabela 2 of Jasper, Biaggioni & Silva, Nucleus 10(2):183-190 (2013), a Brazilian peer-reviewed characterisation of Crambe abyssinica Hochst. oil and its biodiesel, gives palmitic 3.4, stearic 1.1, oleic 17.8, linoleic 6.1, linolenic 2.8, arachidic 1.7, eicosenoic (C20:1) 6.7, behenic 3.7 and erucic (C22:1) 56.7 %, with the paper's own saturated/unsaturated totals of 9.9 and 90.1 % - the nine acids sum to exactly 100.0 % and reproduce both totals, which is how the row/value assignment was checked (the PDF's table columns extract out of order). The running text states the erucic figure independently: 'o acido erucico correspondeu a 56,7% da composicao dos acidos graxos'. Corroborated by Embrapa Agroenergia, which measured 56.23-56.3 % erucic in crambe variety FMS 1 Brilhante grown at Planaltina, DF (2022 safrinha), and by the abstract of Lalas et al., JAOCS 89(12):2253-2258 (2012), which reports 63.77 % C22:1 and 2.14 % C22:0 in a Greek hexane-extracted crambe oil. So erucic ranges roughly 56-64 % by cultivar and season; 56.7 % is used as typical because it is the one figure that comes with a complete, self-consistent profile. NO SAPONIFICATION VALUE IS RECORDED, and that is deliberate. Jasper et al. measured density (911.3 kg/m3), kinematic viscosity (49.02 mm2/s), iodine value (88 g I2/100 g), acid value (3.64 mg KOH/g) and water content (803.4 mg/kg) but not the saponification value. Lalas et al. state in their abstract that they determined one, but the number appears only in the paywalled full text, and the abstract does not print it. Every other figure on offer traces back to a soap calculator or a supplier page, which this dataset will not copy. The calculator will derive a value from the profile instead: the recorded composition implies about 170 mg KOH/g. WHAT MATTERS FOR SOAP: that derived figure is far lower than any common oil because more than half the fat is a 22-carbon acid - erucic weighs 338 g/mol against oleic's 282, so a gram of abyssinian oil contains fewer ester bonds and eats correspondingly less lye. Treating it as 'another liquid oil' at ~190 will over-lye the batch by roughly 10 %. The measured iodine value of 88 is moderate and matches the profile (one double bond on a long chain contributes little iodine per gram), which is why the oil is oxidatively stable - Embrapa measured a 25.5 h Rancimat induction period, nearly three times canola's 8.7 h in the same run. Behenic at 2-4 % and no lignoceric were reported by Jasper; Lalas additionally found nervonic acid (C24:1), which has no key in this schema and is not recorded. Lalas reports a single DSC thermal peak at -20.94 C; because the abstract does not say whether that is the melting or the crystallisation event, meltingPointC is left null rather than guessed. Unsaponifiable matter was not measured in any document opened. INCI not verified on CosIng in this session, 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.