hydrocarbon has definitions from the field of chemistry
1
[ noun ] (chemistry) an organic compound containing only carbon and hydrogen

Used in print

(Jay C. Harris and John R. Van Wazer, "Detergent...)

Greasy soils , which are typified by hydrocarbons and fats ( esters of glycerol with long chain organic acids ) .

( 3 ) For anionics , these micelles appear to be roughly spherical assemblages in which the hydrocarbon tails come together so that the polar groups ( the ionized ends ) face outward towards the aqueous continuous phase .

Related_to micelle formation is the technologically important ability of detergent actives to congregate at oil_water_interfaces in such a manner that the polar ( or ionized ) end of the molecule is directed towards the aqueous phase and the hydrocarbon chain towards the oily phase .

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