Pracaxi seed oil: SAP value and fatty acids
Pracaxi seed oil has a saponification value of 178 mg KOH/g. One gram needs 0.127 g of sodium hydroxide (NaOH) for bar soap or 0.178 g of potassium hydroxide (KOH) for liquid soap to turn fully into soap, before any superfat.
Key numbers
- SAP, NaOH
- 0.126893 g per g oil
- SAP, KOH
- 0.178 g per g oil
- Saponification value
- 178 mg KOH/g
- INCI name
- Pentaclethra Macroloba Seed Oil
Example: 100 g of Pracaxi seed oil with no superfat needs 12.7 g of 100% NaOH, or 17.8 g of 100% KOH. A 5% superfat uses 5% less.
In soap
Its main fatty acids in our cited profile are oleic (46.4%) and linoleic (12.1%). The eight fatty acids used in soap-quality scores make up 65.2% of the profile.
On its own it scores 5 for hardness, 0 for cleansing and 60 for conditioning, with a saturated : unsaturated split of 5 : 60.
Only one numeric source found. Pracaxi is high in behenic and lignoceric acids (long chains), which lowers its SAP value. Brazilian supplier specs seen in search results give wide ranges (about 150–210) but could not be opened, so they are not used. Check your supplier's COA. Only one published source was found for this value; confirm it against your supplier's certificate of analysis.
Fatty-acid profile
| Fatty acid | % of fatty acids | Counts toward |
|---|---|---|
| lauric | 0.2% | hardness, cleansing, bubbly lather |
| myristic | 0.1% | hardness, cleansing, bubbly lather |
| palmitic | 1.5% | hardness, creamy lather |
| stearic | 3.5% | hardness, creamy lather |
| ricinoleic | 0% | conditioning, bubbly and creamy lather |
| oleic | 46.4% | conditioning |
| linoleic | 12.1% | conditioning |
| linolenic | 1.4% | conditioning |
Basis: de Souza Eberhart et al. 2026 Table 3 (commercial cold-pressed pracaxi oil).
Soap-quality scores (this oil alone)
| Hardness | 5 |
|---|---|
| Cleansing | 0 |
| Conditioning | 60 |
| Bubbly lather | 0 |
| Creamy lather | 5 |
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: 178 mg KOH/g (Median of sources' mgKoh_mid (no Codex/pharmacopoeia standard found)), from What are SAP Values in Soap Making? (SAP table), The Soapery (UK soap supplier). Printed value: 178 mg KOH/g.
Published values we checked:
Fatty acids: de Souza Eberhart B. et al. (2026) Evaluation of Pracaxi Oil as a Functional Feed Additive for Laying Japanese Quails. Anim Sci J. doi:10.1111/asj.70238, Wiley (open access, peer-reviewed).
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.
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