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Indicele de saponificare reprezinta cantitatea de hidroxid alcalin(KOH, NaOH0 exprimata in mg, care reactioneaza cu un gram de grasime. determinati indicele de saponificare al dipalmito-stearinei in raport cu KOH.

Răspuns :

     dipalmitostearina :C53H102O6  + 3KOH   ⇒ C53H99O6K3 + 3H2O
(-COOH + KOH ⇒ -COOK)
M = 834g/mol
nKOH = 3n grasime   
mKOH/M KOH = 3· m grasime/M grasime
m KOH = 56·3·1/834 = 0,201 g ⇒⇒  Is = 201,438 mg KOH/(1g grasime)