Oil A
Castor OilRicinus communis
NaOH 0.1280
Load 500 gHead-to-head
Castor Oil vs Neem Oil
soft
soft
Oil B
Neem OilAzadirachta indica
NaOH 0.1387
Load 500 gSubstitution factor
NaOH SAP A 0.1280NaOH SAP B 0.1387A / B = 0.1280 / 0.1387
0.9229
Multiply your lye amount by 0.9229 when swapping Castor Oil for Neem Oil.
Inverse 1.0836 when swapping Neem Oil for Castor Oil.
500 g swap · pure NaOH
- 500 g Castor Oil
- 64.00 g NaOH
- 500 g Neem Oil
- 69.35 g NaOH
- Lye_A = Lye_B × factor
- 69.35 × 0.9229 = 64.00
Constants
SAP, iodine, INS
| Metric | Castor Oil | Neem Oil | Δ A−B |
|---|---|---|---|
| NaOH SAP (pure) | 0.1280 | 0.1387 | -0.0107 |
| KOH SAP (pure) | 0.1800 | 0.1945 | -0.0145 |
| KOH SAP (90%) | 0.2000 | 0.2161 | -0.0161 |
| Iodine value | 86 | 72 | +14 |
| INS | 95 | 123 | -28 |
| Max % of oils | 10% | 10% | 0 |
| Hardness class | soft | soft | — |
| Trace | accelerates | accelerates | — |
| INCI (pre-sap) | Ricinus Communis (Castor) Seed Oil | Azadirachta Indica (Neem) Seed Oil | — |
| INCI NaOH salt | Sodium Ricinoleate | Sodium Neemate | — |
| INCI KOH salt | Potassium Ricinoleate | Potassium Neemate | — |
Fatty acids
Eight-acid profile
| Metric | Castor Oil | Neem Oil | Δ A−B |
|---|---|---|---|
| Lauric C12:0 | 0.0% | 0.0% | 0.0 |
| Myristic C14:0 | 0.0% | 0.0% | 0.0 |
| Palmitic C16:0 | 1.0% | 18.0% | -17.0 |
| Stearic C18:0 | 1.0% | 18.0% | -17.0 |
| Ricinoleic C18:1-OH | 90.0% | 0.0% | +90.0 |
| Oleic C18:1 | 4.0% | 52.0% | -48.0 |
| Linoleic C18:2 | 4.0% | 9.0% | -5.0 |
| Linolenic C18:3 | 0.0% | 0.0% | 0.0 |
Quality
Physical contribution
| Metric | Castor Oil | Neem Oil | Δ A−B |
|---|---|---|---|
| Hardness | 2.0 | 36.0 | -34.0 |
| Cleansing | 0.0 | 0.0 | 0.0 |
| Conditioning | 98.0 | 61.0 | +37.0 |
| Bubbly lather | 90.0 | 0.0 | +90.0 |
| Creamy lather | 92.0 | 36.0 | +56.0 |
| Longevity | 2.0 | 36.0 | -34.0 |