Castor Oil has a saponification (SAP) value of 0.1283 for NaOH (bar soap) and 0.18 for KOH (liquid soap). It's typically used at 3-10% of the oils.
How much lye for Castor Oil?
Lye at 0% superfat = oil weight × SAP. Apply your superfat to reduce it (e.g. ×0.95 for 5%).
| Castor Oil | NaOH (0% SF) | NaOH (5% SF) | KOH (0% SF) |
|---|---|---|---|
| 100 g | 12.8 g | 12.2 g | 18 g |
| 250 g | 32.1 g | 30.5 g | 45 g |
| 500 g | 64.2 g | 60.9 g | 90 g |
What Castor Oil does in soap
| Property | Value |
|---|---|
| Hardness | 3 |
| Cleansing | 0 |
| Conditioning | 95 |
| Bubbly lather | 7 |
| Creamy lather | 90 |
| Longevity | 3 |
Values are the oil's solo contribution (SoapCalc-style property model). Real bars blend several oils — build the full recipe to see the combined profile.
Fatty-acid profile
| Fatty acid | % |
|---|---|
| palmitic | 2% |
| stearic | 1% |
| ricinoleic | 87% |
| oleic | 4% |
| linoleic | 4% |
Usage notes
Kopuk stabilitesi icin kullanilir; fazla oran yapiskan his verebilir.
Build a recipe with Castor Oil in SoapCalc — it computes the exact lye for your oils at any superfat and saves the recipe. See all soap-making oils or the SAP value chart.