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Stearic acid (/ ห s t ษชษr ษช k / STEER-ik, / s t i ห ær ษช k / stee-ARR-ik) is a saturated fatty acid with an 18-carbon chain. [9] The IUPAC name is octadecanoic acid. [9] It is a soft waxy solid with the formula CH 3 (CH 2) 16 CO 2 H. [9] The triglyceride derived from three molecules of stearic acid is called stearin. [9]
Calcium stearate is produced by heating stearic acid and calcium oxide: 2 C 17 H 35 COOH + CaO → (C 17 H 35 COO) 2 Ca + H 2 O. It is also the main component of soap scum, a white solid that forms when soap is mixed with hard water. Unlike soaps containing sodium and potassium, calcium stearate is insoluble in water and does not lather well. [2]
In this context, soap is used in its formal sense, a metal salt of a fatty acid: in this case stearic acid. It is a white solid that repels water. It is insoluble in polar solvents such as alcohol and ether but soluble in aromatic hydrocarbons (e.g., benzene) and chlorinated hydrocarbons when heated.
Shea butter (/ ส iห / SHEE, / ห ส iห ษ / SHEE-ษ, or / ส eษช / SHAY; Bambara: ฿฿฿ฎ฿฿฿฿, romanized: sìtulu [1]) is a fat (triglyceride; mainly oleic acid and stearic acid) extracted from the nut of the African shea tree (Vitellaria paradoxa). [2] It is ivory in color when raw and commonly dyed yellow with borututu root or palm oil ...
Sodium stearate (IUPAC: Sodium Octadecanoate) is the sodium salt of stearic acid. This white solid is the most common soap. It is found in many types of solid deodorants, rubbers, latex paints, and inks. It is also a component of some food additives and food flavorings. [1]
Cocoa butter contains a high proportion of saturated fats also with the monounsaturated oleic acid in each triglyceride. The predominant triglycerides are POS, SOS, and POP, where P = palmitic, O = oleic, and S = stearic acid residues.
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