Sour cherry kernel oil (Prunus cerasus): SAP value and fatty acids
Sour cherry kernel oil (Prunus cerasus) has a saponification value of 184 mg KOH/g. One gram needs 0.131 g of sodium hydroxide (NaOH) for bar soap or 0.184 g of potassium hydroxide (KOH) for liquid soap to turn fully into soap, before any superfat.
Key numbers
- SAP, NaOH
- 0.13117 g per g oil
- SAP, KOH
- 0.184 g per g oil
- Saponification value
- 184 mg KOH/g
- INCI name
- Prunus Cerasus Seed Oil
Example: 100 g of Sour cherry kernel oil (Prunus cerasus) with no superfat needs 13.1 g of 100% NaOH, or 18.4 g of 100% KOH. A 5% superfat uses 5% less.
In soap
Its main fatty acids in our cited profile are linoleic (42.5%) and oleic (36.7%). The eight fatty acids used in soap-quality scores make up 88.6% of the profile.
On its own it scores 9 for hardness, 0 for cleansing and 79 for conditioning, with a saturated : unsaturated split of 9 : 79.
Only one source (peer-reviewed). 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 | 6.4% | hardness, creamy lather |
| stearic | 2.8% | hardness, creamy lather |
| ricinoleic | 0% | conditioning, bubbly and creamy lather |
| oleic | 36.7% | conditioning |
| linoleic | 42.5% | conditioning |
| linolenic | 0.2% | conditioning |
Basis: Mean of eight sour cherry cultivars, Stryjecka et al. 2022 Table 3; lauric/myristic not reported, recorded as 0.
Soap-quality scores (this oil alone)
| Hardness | 9 |
|---|---|
| Cleansing | 0 |
| Conditioning | 79 |
| Bubbly lather | 0 |
| Creamy lather | 9 |
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: 184 mg KOH/g (Single source only), from Stryjecka M. et al. (2022) Comparative Assessment of Phytochemical Compounds and Antioxidant Properties of Kernel Oil from Eight Sour Cherry (Prunus cerasus L.) Cultivars. Molecules 27(3):696, MDPI (open access, peer-reviewed). Printed value: mean 184 (cultivars 182–191) mg KOH/g.
Published values we checked:
Fatty acids: Stryjecka M. et al. (2022) Comparative Assessment of Phytochemical Compounds and Antioxidant Properties of Kernel Oil from Eight Sour Cherry (Prunus cerasus L.) Cultivars. Molecules 27(3):696, MDPI (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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