Three major fatty acids and cyclopropenoic acids
LaboratoryGas chromatographySeeds of all Adansonia species
All the oils contain mostly palmitic, oleic and linoleic acids, plus cyclopropenoic and cyclopropanoic acids, characteristic of the Malvaceae. The profile is not enough to identify the species with certainty and does not vary significantly with the place, soil or climate of harvest1.
Highly variable cyclopropenoic acid contents
LaboratorySix Adansonia speciesMadagascar and Africa
The seeds contain 8 to 46% oil depending on the species. Malvalic acid varies from 3 to 28%, sterculic acid from 1 to 8%2. The supplier and the batch therefore matter.
Heating during refining reduces these acids
LaboratoryCrude oil from TanzaniaHeating at 150, 200 and 250 °C
Cyclopropenoic fatty acids, which the authors consider a concern for the consumption of the crude oil, break down mostly at 200 °C. The authors recommend refining between 200 and 250 °C3. This is a study on ingestion: it does not apply to application on the skin.
The extraction process changes yield and indices
LaboratorySeeds from GhanaSolvent or mechanical extraction
Solvent extraction gives 27.75% oil versus 5.422% for mechanical extraction; peroxide values are 11.89 (solvent) and 15.09 mEq/g (mechanical)5.
Supercritical CO₂ gives a profile close to hot pressing
LaboratoryOptimization at 77 °CComparison with hot pressing
The yield is 9.3 ± 1.1% versus 37% for hot pressing. The profile remains comparable (oleic 37%, linoleic 29%, palmitic 30%) and the oil is solvent-free4.