(eds.) NIST Chemistry WebBook, NIST Standard Reference Database Number 69, National Institute of Standards and Technology, Gaithersburg (MD) (retrieved ) ^ a b c d Tristearin in Linstrom, Peter J."Structure of β-trimyristin and β-tristearin from high-resolution X-ray powder diffraction data". Journal of the American Oil Chemists' Society. CRC Handbook of Chemistry and Physics (90th ed.). Stearin is also added to aluminium flakes to help in the grinding process in making dark aluminium powder. It is mixed with a sodium hydroxide solution in water, creating a reaction which gives glycerin and sodium stearate, the main ingredient in most soap: C 3H 5(C 18H 35O 2) 3 + 3 NaOH → C 3H 5(OH) 3 + 3 C 18H 35OONa Stearin is used as a hardening agent in the manufacture of candles and soap. Stearin is a side product obtained during the extraction of cod liver oil removed during the chilling process at temperatures below −5 ☌. It can be obtained by interesterification, again exploiting its higher melting point which allows the higher melting tristearin to be removed from the equilibrated mixture. It can be partially purified by dry fractionation by pressing tallow or other fatty mixtures, leading to separation of the higher melting stearin-rich material from the liquid, which is typically enriched in fats derived from oleic acid. It can also be found in tropical plants such as palm. Stearin is obtained from animal fats created as a byproduct of processing beef.
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