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In page Polyethoxylated tallow amine:

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Animal fat is hydrolysed to give a mixture of free fatty acids, typically oleic (37–43%), palmitic (24–32%), stearic (20–25%), myristic (3–6%), and linoleic (2–3%). These are then converted to fatty amines via the nitrile process before being ethoxylated with ethylene oxide; this makes them water-soluble and amphiphilic. The length of the fatty tail and degree of exothylation will determine the overall properties of the surfactant.[citation needed]