Red raspberry seed oil: SAP value and fatty acids
Red raspberry seed oil has a saponification value of 188 mg KOH/g. One gram needs 0.134 g of sodium hydroxide (NaOH) for bar soap or 0.188 g of potassium hydroxide (KOH) for liquid soap to turn fully into soap, before any superfat.
Key numbers
- SAP, NaOH
- 0.134022 g per g oil
- SAP, KOH
- 0.188 g per g oil
- Saponification value
- 188 mg KOH/g
- INCI name
- Rubus Idaeus Seed Oil
Example: 100 g of Red raspberry seed oil with no superfat needs 13.4 g of 100% NaOH, or 18.8 g of 100% KOH. A 5% superfat uses 5% less.
In soap
Its main fatty acids in our cited profile are linoleic (57%) and linolenic (25.1%). The eight fatty acids used in soap-quality scores make up 98.8% of the profile.
On its own it scores 4 for hardness, 0 for cleansing and 95 for conditioning, with a saturated : unsaturated split of 4 : 95.
Rich in linoleic and linolenic acids; use at low levels. Published sources for this oil differ by more than 3%, so checking your supplier's certificate of analysis matters more than usual.
Fatty-acid profile
| Fatty acid | % of fatty acids | Counts toward |
|---|---|---|
| lauric | 0% | hardness, cleansing, bubbly lather |
| myristic | 0% | hardness, cleansing, bubbly lather |
| palmitic | 3.2% | hardness, creamy lather |
| stearic | 1.1% | hardness, creamy lather |
| ricinoleic | 0% | conditioning, bubbly and creamy lather |
| oleic | 12.4% | conditioning |
| linoleic | 57% | conditioning |
| linolenic | 25.1% | conditioning |
Basis: Mean of four commercial red raspberry seed oils (2 cold-pressed, 2 CO2-extracted; supplier certificate data) in Gledovic et al. 2020 Table 1.
Soap-quality scores (this oil alone)
| Hardness | 4 |
|---|---|
| Cleansing | 0 |
| Conditioning | 95 |
| Bubbly lather | 0 |
| Creamy lather | 4 |
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: 188 mg KOH/g (Median of sources' mgKoh_mid (no Codex/pharmacopoeia standard found)), from Saponification Chart, From Nature With Love (soap/cosmetic supplier). Printed value: 188 mg KOH/g.
Published values we checked:
- 188 mg KOH/g — From Nature With Love (soap/cosmetic supplier)
- 188 mg KOH/g — The Soapery (UK soap supplier)
- 150–205 mgKOH/g mg KOH/g — Aromantic (UK cosmetic supplier)
Fatty acids: Gledovic A. et al. (2020) Low-energy nanoemulsions as carriers for red raspberry seed oil: formulation approach based on Raman spectroscopy and textural analysis, physicochemical properties, stability and in vitro antioxidant/biological activity. PLoS One 15:e0230993. doi:10.1371/journal.pone.0230993, PLOS (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.
Last updated .