Babassu oil: SAP value and fatty acids
Babassu oil has a saponification value of 250.5 mg KOH/g. One gram needs 0.179 g of sodium hydroxide (NaOH) for bar soap or 0.251 g of potassium hydroxide (KOH) for liquid soap to turn fully into soap, before any superfat.
Key numbers
- SAP, NaOH
- 0.178577 g per g oil
- SAP, KOH
- 0.2505 g per g oil
- Saponification value
- 250.5 mg KOH/g
- Iodine value
- 14
- INS
- 237
- INCI name
- Orbignya Oleifera Seed Oil
Example: 100 g of Babassu oil with no superfat needs 17.9 g of 100% NaOH, or 25.0 g of 100% KOH. A 5% superfat uses 5% less.
In soap
Its main fatty acids in our cited profile are lauric (44.4%) and myristic (17.8%). The eight fatty acids used in soap-quality scores make up 91.4% of the profile.
On its own it scores 74 for hardness, 62 for cleansing and 17 for conditioning, with a saturated : unsaturated split of 74 : 17.
Published sources for this oil differ by more than 3%, so checking your supplier's certificate of analysis matters more than usual.
Fatty-acid profile
| Fatty acid | % of fatty acids | Counts toward |
|---|---|---|
| lauric | 44.4% | hardness, cleansing, bubbly lather |
| myristic | 17.8% | hardness, cleansing, bubbly lather |
| palmitic | 7.6% | hardness, creamy lather |
| stearic | 4.3% | hardness, creamy lather |
| ricinoleic | 0% | conditioning, bubbly and creamy lather |
| oleic | 13.6% | conditioning |
| linoleic | 3.7% | conditioning |
| linolenic | 0% | conditioning |
Basis: Codex CXS 210 Table 1 range midpoints, normalised to 100% (raw midpoints total 107.0%).
Soap-quality scores (this oil alone)
| Hardness | 74 |
|---|---|
| Cleansing | 62 |
| Conditioning | 17 |
| Bubbly lather | 62 |
| Creamy lather | 12 |
| Iodine | 14 |
| INS | 237 |
Each score adds up certain fatty acids, the way Soap Ledger scores a whole recipe. They are for comparing recipes; they don't predict how a bar will feel, and they say nothing about safety or skin.
Sources
SAP value: 250.5 mg KOH/g (Codex CXS 210 range midpoint), from Codex Alimentarius CXS 210-1999, Standard for Named Vegetable Oils (Table 2: chemical and physical characteristics), FAO/WHO Codex Alimentarius Commission. Printed value: 245–256 mg KOH/g.
Published values we checked:
- 245–256 mg KOH/g — FAO/WHO Codex Alimentarius Commission
- 245–256 mg KOH/g — From Nature With Love (soap/cosmetic supplier)
- 250 mg KOH/g — The Soapery (UK soap supplier)
- NaOH 0.1749 / KOH 0.2463 g alkali per g oil — Certified Lye
- 236.9 ± 2.7 mg KOH/g — Hindawi/Wiley (peer-reviewed, open access)
Fatty acids and iodine: Codex Alimentarius CXS 210-1999, Standard for Named Vegetable Oils (Table 2: chemical and physical characteristics), FAO/WHO Codex Alimentarius Commission. Also checked: U.S. Department of Agriculture, Agricultural Research Service (Fatty acid nutrients (g/100 g food)).
NaOH and KOH values are converted from mg KOH/g with the molar masses 39.997 and 56.106 and rounded to 6 decimals, exactly as in the Soap Ledger app. Real oils vary by origin, grade and lot: check your supplier's certificate of analysis. Verify every weight before you make this, and follow lye safety. Not a safety or compliance certification.
Last updated .