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For example, shark oil is not suitable for soap making as it may contain more than 10% of unsaponifiable matter. [11] For edible oils, the tolerated limit of unsaponifiable matter is 1.5% (olive, refined soybean), while inferior quality crude or pomace oil could reach 3%. [12] [13]
Aleppo soap (also known as savon d'Alep, laurel soap, Syrian soap, or ghar soap, the Arabic word غَار, meaning 'laurel') is a handmade, hard bar soap associated with the city of Aleppo, Syria. Aleppo soap is classified as a Castile soap as it is a hard soap made from olive oil and lye, from which it is distinguished by the inclusion of ...
Some soap-makers leave the glycerol in the soap. Others precipitate the soap by salting it out with sodium chloride. Skeletal formula of stearin, a triglyceride that is converted by saponification with sodium hydroxide into glycerol and sodium stearate. Fat in a corpse converts into adipocere, often called "grave wax".
The resulting product can be called oleochemicals (from Latin: oleum "olive oil"). The major product of this industry is soap, approximately 8.9×10 6 tons of which were produced in 1990. Other major oleochemicals include fatty acids, fatty acid methyl esters, fatty alcohols and fatty amines.
Mango oil, pressed from the stones of the mango fruit, is high in stearic acid, and can be used for making soap. [207] Mowrah butter, from the seeds of the Madhuca latifolia and Madhuca longifolia, both native to India. Crude Mowrah butter is used as a fat for spinning wool, for making candles and soap.
Iodine value helps to classify oils according to the degree of unsaturation into drying oils, having IV > 150 (i.e. linseed, tung), semi-drying oils IV : 125 – 150 ( soybean, sunflower) and non-drying oils with IV < 125 (canola, olive, coconut). The IV ranges of several common oils and fats is provided by the table below.