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Sodium alkyl sulphates - Oils and Fats
These types of detergents are sodium salts of sulphuric acid esters of long chain aliphatic alcohols consisting of generally 10 to 15 carbon atoms. The alcohols are acquired from oils or fats by hydrogenolysis.
The other instances are sodium cetyl sulphate,C16H33OSO2ONa and sodium stearyl sulphate, CH3(CH)16CH2OSO3ONa. Not like ordinary soaps, they do not generate OH- ions on hydrolysis and so can be safely employed for woollen garments.
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Phenol + HNO3(in prescence of sulphuric acid) --> 2-nitrophenol + 4-nitrophenol.
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