Hazelnut oil: SAP value and fatty acids
Hazelnut oil has a saponification value of 191 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
- 0.136161 g per g oil
- SAP, KOH
- 0.191 g per g oil
- Saponification value
- 191 mg KOH/g
- Iodine value
- 85
- INS
- 106
- INCI name
- Corylus Avellana Seed Oil
Example: 100 g of Hazelnut 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 oleic (81.4%) and linoleic (10.6%). The eight fatty acids used in soap-quality scores make up 99.6% of the profile.
On its own it scores 8 for hardness, 0 for cleansing and 92 for conditioning, with a saturated : unsaturated split of 8 : 92.
Fatty-acid profile
| Fatty acid | % of fatty acids | Counts toward |
|---|---|---|
| lauric | 0% | hardness, cleansing, bubbly lather |
| myristic | 0.1% | hardness, cleansing, bubbly lather |
| palmitic | 5.4% | hardness, creamy lather |
| stearic | 2.1% | hardness, creamy lather |
| ricinoleic | 0% | conditioning, bubbly and creamy lather |
| oleic | 81.4% | conditioning |
| linoleic | 10.6% | conditioning |
| linolenic | 0% | conditioning |
Basis: USDA FDC SR Legacy 171427, converted to % of total fatty acids.
Soap-quality scores (this oil alone)
| Hardness | 8 |
|---|---|
| Cleansing | 0 |
| Conditioning | 92 |
| Bubbly lather | 0 |
| Creamy lather | 8 |
| Iodine | 85 |
| INS | 106 |
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 mg KOH/g (Median of sources), from Saponification Chart, From Nature With Love (soap/cosmetic supplier). Printed value: 187 - 195 mg KOH/g.
Published values we checked:
- 187 - 195 mg KOH/g — From Nature With Love (soap/cosmetic supplier)
- 190 mg KOH/g — The Soapery (UK soap supplier)
- NaOH 0.1369 / KOH 0.1928 g alkali per g oil — Certified Lye
Fatty acids and iodine: USDA FoodData Central, SR Legacy: Oil, hazelnut (FDC ID 171427), U.S. Department of Agriculture, Agricultural Research Service. Also checked: Wiley (Table 1 (HO, before frying)); Ministry of Health, Labour and Welfare (Japan) (PDF p. 2353).
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 .