Oat kernel oil: SAP value and fatty acids
Oat kernel oil has a saponification value of 191.25 mg KOH/g. One gram needs 0.136 g of sodium hydroxide (NaOH) for bar soap or 0.191 g of potassium hydroxide (KOH) for liquid soap to turn fully into soap, before any superfat.
Key numbers
- SAP, NaOH
- 0.136339 g per g oil
- SAP, KOH
- 0.19125 g per g oil
- Saponification value
- 191.25 mg KOH/g
- INCI name
- Avena Sativa Kernel Oil
Example: 100 g of Oat kernel oil with no superfat needs 13.6 g of 100% NaOH, or 19.1 g of 100% KOH. A 5% superfat uses 5% less.
In soap
Its main fatty acids in our cited profile are linoleic (40.9%) and oleic (36.5%). The eight fatty acids used in soap-quality scores make up 98.5% of the profile.
On its own it scores 19 for hardness, 1 for cleansing and 79 for conditioning, with a saturated : unsaturated split of 19 : 79.
Only supplier figures were found; they agree.
Fatty-acid profile
| Fatty acid | % of fatty acids | Counts toward |
|---|---|---|
| lauric | 0.4% | hardness, cleansing, bubbly lather |
| myristic | 0.3% | hardness, cleansing, bubbly lather |
| palmitic | 17.4% | hardness, creamy lather |
| stearic | 1.1% | hardness, creamy lather |
| ricinoleic | 0% | conditioning, bubbly and creamy lather |
| oleic | 36.5% | conditioning |
| linoleic | 40.9% | conditioning |
| linolenic | 1.9% | conditioning |
Basis: USDA FDC SR Legacy 173576 "Oil, oat", individual fatty acids divided by total fatty acids.
Soap-quality scores (this oil alone)
| Hardness | 19 |
|---|---|
| Cleansing | 1 |
| Conditioning | 79 |
| Bubbly lather | 1 |
| Creamy lather | 19 |
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: 191.25 mg KOH/g (Median of sources' mgKoh_mid), from Certificate of Analysis – Oat Emollient (INCI Avena Sativa (Oat) Kernel Oil), representative sample, MakingCosmetics (supplier). Printed value: 185.0 - 200.0 mg KOH/g (lot result 186.0) mg KOH/g.
Published values we checked:
- 185.0 - 200.0 mg KOH/g (lot result 186.0) mg KOH/g — MakingCosmetics (supplier)
- NaOH 0.135 / KOH 0.19 g alkali per g oil — Supplies For Candles (UK supplier)
Fatty acids: USDA FoodData Central, SR Legacy 173576 "Oil, oat", U.S. Department of Agriculture, Agricultural Research Service. Also checked: MakingCosmetics (supplier) (Fatty acid rows (AOCS Ce 1b-89)).
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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