Ácidos graxos de coco
Nome INCI: Coconut Acid. Saponificado com NaOH, é listado como Sodium Cocoate e, com KOH, como Potassium Cocoate. Também: Ácidos gordos de coco.
Valores publicados
| Índice de saponificação | 266–275 mg KOH/g |
| Usado pela calculadora | 270,5 mg KOH/g (ponto médio) |
| SAP para NaOH | 0,1928 g/g |
| Índice de iodo | 7–11 g I₂/100 g |
| INS (SAP − índice de iodo) | 262 |
| Ponto de fusão | — |
| Matéria insaponificável | — |
Uma barra 100 % ácidos graxos de coco
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 caproico | C6:0 · saturados | ≤ 1 | 1,0 |
| Ácido caprílico | C8:0 · saturados | 5–8 | 6,5 |
| Ácido cáprico | C10:0 · saturados | 5–8 | 6,5 |
| Ácido láurico | C12:0 · saturados | 47–53 | 50,0 |
| Ácido mirístico | C14:0 · saturados | 15–21 | 18,0 |
| Ácido palmítico | C16:0 · saturados | 8–12 | 10,0 |
| Ácido esteárico | C18:0 · saturados | ≤ 4 | 4,0 |
| Ácido oleico | C18:1 | 5–12 | 8,5 |
| Ácido linoleico | C18:2 | ≤ 2 | 2,0 |
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.
Composition table on the product page (header row 'Specification | Typical Values'): acid value, saponification value, iodine value, titre, colour, moisture and C6-C18:2 composition. Saved HTML converted to text with python (tags stripped, html.unescape). No date is printed on the page.
Brochure PDF (uploaded 2012) used to confirm the DC-0818 limits and the 'known as DCFA in Natoleo' remark; pdftotext -raw keeps the DC-0818 value first on each row, while the -layout rows are offset by one or more lines.
Quoted in notes only, to separate the topped (C8-C10 stripped) cut from the whole cut recorded here: acid value, saponification value, iodine value and C12 range.
Distilled coconut fatty acid, whole cut: coconut oil split into free fatty acids and distilled without removing the C6-C10 front end, so the chain distribution is the parent oil's (compare coconut-oil). This record is Wilmar's WILFARIN DC-0818 (listed in the brochure as known in Natoleo as DCFA), and only that grade. Product page table, headed 'Specification | Typical Values', with the values printed in the Typical Values column: acid value 265-275 mg KOH/g, saponification value 266-275 mg KOH/g, iodine value 7-11 (% I2 absorbed, i.e. g/100 g), titre 22-26 C, colour 1.0/10 max (Lovibond R/Y), moisture 0.2 % max; composition C6 1 max, C8 5-8, C10 5-8, C12 47-53, C14 15-21, C16 8-12, C18 4 max, C18-1 5-12, C18-2 2 max, others 0.5 max. The unsaturated rows are printed as totals and are mapped to oleic and linoleic. The page's boilerplate says Wilfarin fatty acids are derived from palm oil and palm kernel oil; this product is nonetheless named and specified as coconut, and its composition is coconut's. Wilmar's 2012 oleochemicals brochure prints the same limits for DC-0818 in its Distilled Fatty Acids table except moisture, 0.1 % max there (read from the raw-mode text, where each row starts with the DC-0818 value; the layout-mode rows are offset). As a free fatty acid it neutralises lye rather than saponifying, so the acid value is effectively the lye demand; the saponification value runs 1 unit higher at the bottom of the band, as on Wilmar's other cuts. The titre is a solidification point, not a melting point, so meltingPointC is null; no unsaponifiable limit is printed for DC-0818 (the brochure prints '-'), so unsaponifiablePercent is null. The band midpoints sum to 99.5 %; the three 'max' limits (C6, C18, C18-2) count at their full limit when read as values, which is why the representative total comes to about 106 %. Not the same product as the topped (stripped) cut: Wilmar's DC-1218 'distilled topped coconut fatty acid', with the C8-C10 front end removed, prints acid value 250-260, saponification value 251-261, iodine value 15 max and C12 48-58 %, so using this record for a topped acid would over-dose lye by several percent. Also checked: Emery Oleochemicals' Vegetable Fatty Acids page lists EMERY 622 and 626 with lauric-range acid values but describes both as 'Vegetable Stearic Acid' and does not name the feedstock, so it was not used. Wilmar prints no INCI name; the INCI name, CAS and EC numbers are CosIng's entry for Coconut Acid ('Fatty acids, coco'), and the salt names are its entries for Sodium Cocoate and Potassium Cocoate.
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.