Rosehip Seed Oil
INCI Rosa Canina Seed Oil. Also: Rosa canina seed oil, Rose hip seed oil, Rosa rubiginosa seed oil (rosa mosqueta), Rosehip oil, Rosa mosqueta oil.
Published values
| Saponification value | 193.47 mg KOH/g |
| Used by the calculator | 193.5 mg KOH/g (typical) |
| SAP for NaOH | 0.1379 g/g |
| Iodine value | 170.04 g I₂/100 g |
| INS (SAP − IV) | 23 |
| Melting point | -25.56 °C |
| Unsaponifiable matter | 1.37 % |
Soapmaking books print about 0.133 g NaOH per g (median of 2 books). Books print 0.133 g NaOH per g for rosehip oil. Measured oils of both species sold as rosehip came in at 190 and 193.5 mg KOH/g, and their fatty acids agree, so we use 193.5 (0.138); in a recipe the difference is small.
A bar made of 100 % Rosehip Seed Oil
Conventional qualities summed from the fatty-acid groups; a single-oil bar is a reference point, not a recipe.
How much lye
| Oil | NaOH | KOH |
|---|---|---|
| 500 g | 65.5 g | 91.9 g |
| 1 kg | 131.0 g | 183.8 g |
| 1 lb (454 g) | 59.4 g | 83.4 g |
| 2 lb (907 g) | 118.9 g | 166.7 g |
For this oil alone at 5 % superfat, with pure sodium hydroxide (NaOH) or pure potassium hydroxide (KOH); in brackets, across the published range of its saponification value. KOH is usually sold at 90 %: divide by 0.9. For a whole recipe, open the calculator.
Fatty-acid profile
Saturated : unsaturated 7 : 93
| Fatty acid | Published range, % | Used | |
|---|---|---|---|
| Palmitic acid | C16:0 · saturated | 3.7 | 3.7 |
| Palmitoleic acid | C16:1 | 0.1 | 0.1 |
| Stearic acid | C18:0 · saturated | 2.2 | 2.2 |
| Oleic acid | C18:1 | 19.3 | 19.3 |
| Linoleic acid | C18:2 | 51.1 | 51.1 |
| α-Linolenic acid | C18:3 n-3 | 21.4 | 21.4 |
| Arachidic acid | C20:0 · saturated | 1.1 | 1.1 |
| Gadoleic acid | C20:1 | 0.4 | 0.4 |
| Behenic acid | C22:0 · saturated | 0.2 | 0.2 |
Where these numbers come from
Physicochemical table (saponification value, iodine value, unsaponifiable matter, acid value, free fatty acids, peroxide value, refractive index, density), DSC melting/crystallisation onsets, and Table 4 fatty-acid composition.
Species: Rosa canina L. (dog rose); seeds from the Gumushane region, Turkey (harvest November 2020, cold-pressed June 2021); one oil, analysed in replicate. All values are single-sample means +/- SD from one open-access paper, so no min/max ranges are given: saponification value 193.47 +/- 2.22 mg KOH/g, iodine value 170.04 +/- 2.54 g I2/100 g, unsaponifiable matter 1.37 +/- 0.04 %, acid value 3.22 +/- 0.14 mg KOH/g (free fatty acids 1.61 % as linoleic), peroxide value 14.54 +/- 0.91 meq O2/kg, refractive index 1.48 at 25 C, density 0.92 at 25 C. 'the melting point' is the DSC melting ONSET (-25.56 +/- 0.17 C; crystallisation onset -45.25 C), i.e. The oil is liquid at all room temperatures. Fatty acids from Table 4 (total saturated 7.50 %, unsaturated 92.50 %); 'linolenic' is alpha-linolenic (21.40 %); C20:1 eicosenoic is mapped to 'gadoleic'. Rosa rubiginosa (Chilean rosa mosqueta) oil was not separately sourced; values here are for R. canina only. INCI name from CosIng. INCI: Rosehip seed oil is sold from two species with separate CosIng entries: Rosa Canina Seed Oil and Rosa Rubiginosa Seed Oil (rosa mosqueta). Use the one on your supplier’s documents.
This record is part of the open ingredient database (ODbL), which you can download as CSV or JSON. Found an error or a better primary source? Corrections with a link to the document are welcome at support@soapformulator.com.