Mamey sapote seed oil (sapuyul): SAP value and fatty acids
Mamey sapote seed oil (sapuyul) has a saponification value of 198 mg KOH/g. One gram needs 0.141 g of sodium hydroxide (NaOH) for bar soap or 0.198 g of potassium hydroxide (KOH) for liquid soap to turn fully into soap, before any superfat.
Key numbers
- SAP, NaOH
- 0.141151 g per g oil
- SAP, KOH
- 0.198 g per g oil
- Saponification value
- 198 mg KOH/g
- Iodine value
- 60
- INS
- 138
- INCI name
- Pouteria Sapota Seed Oil
Example: 100 g of Mamey sapote seed oil (sapuyul) with no superfat needs 14.1 g of 100% NaOH, or 19.8 g of 100% KOH. A 5% superfat uses 5% less.
In soap
Its main fatty acids in our cited profile are oleic (48.6%) and stearic (28.7%). The eight fatty acids used in soap-quality scores make up 99.2% of the profile.
On its own it scores 39 for hardness, 0 for cleansing and 60 for conditioning, with a saturated : unsaturated split of 39 : 60.
Only one study found. A 2018 paper (Chemical Engineering Transactions) quoted in search results gives 230.87, but it could not be opened and does not fit the oil's oleic/stearic makeup, so it is not used. 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% | hardness, cleansing, bubbly lather |
| myristic | 0% | hardness, cleansing, bubbly lather |
| palmitic | 10.5% | hardness, creamy lather |
| stearic | 28.7% | hardness, creamy lather |
| ricinoleic | 0% | conditioning, bubbly and creamy lather |
| oleic | 48.6% | conditioning |
| linoleic | 10.8% | conditioning |
| linolenic | 0.6% | conditioning |
Basis: Solís-Fuentes et al. 2015 Grasas y Aceites Table 3, oil from MATURE-fruit seeds, mean of two determinations.
Soap-quality scores (this oil alone)
| Hardness | 39 |
|---|---|
| Cleansing | 0 |
| Conditioning | 60 |
| Bubbly lather | 0 |
| Creamy lather | 39 |
| Iodine | 60 |
| INS | 138 |
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: 198 mg KOH/g (Median of sources' mgKoh_mid (no Codex/pharmacopoeia standard found)), from Solís-Fuentes J.A., Ayala-Tirado R.C., Fernández-Suárez A.D., Durán-de-Bazúa M.C. (2015) Mamey sapote seed oil (Pouteria sapota). Potential, composition, fractionation and thermal behavior. Grasas y Aceites 66(1):e056. doi:10.3989/gya.0691141, CSIC (peer-reviewed, open access). Printed value: 198 mg KOH/g.
Published values we checked:
Fatty acids and iodine: Solís-Fuentes J.A., Ayala-Tirado R.C., Fernández-Suárez A.D., Durán-de-Bazúa M.C. (2015) Mamey sapote seed oil (Pouteria sapota). Potential, composition, fractionation and thermal behavior. Grasas y Aceites 66(1):e056. doi:10.3989/gya.0691141, CSIC (peer-reviewed, open access).
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 .