Dinonylnaphthylsulfonic acid

Dinonylnaphthylsulfonic acid (DINNSA) is an organic chemical, an aryl sulfonic acid. Its CAS number is [25322-17-2]. Its melting point is 259.5 °C and its boiling point is 600.4 °C. It is very little soluble in water. It is a moderate skin irritant and a strong eye irritant. It has low volatility and vapor pressure and is stable above 100 °C.

Additional recommended knowledge

Essential Laboratory Skills Guide

Daily Visual Balance Check

Recognize and detect the effects of electrostatic charges on your balance

Dinonylnaphthylsulfonic acid is used as an additive in industrial lubricants, greases, cutting fluids, industrial coatings, and corrosion inhibitors. Its calcium and barium salts (CAS numbers 57855-77-3 and 25619-56-1) have generally the same use.

Dinonylnaphthylsulfonic acid is also used as an antistatic agent added to some distillate fuels, solvents, commercial jet fuels, and to the military JP-8 fuel in order to increase their electrical conductivity and dissipating static charge in order to lower the fire hazard. It is a component of such additive named Stadis 450.

Dinonylnaphthylsulfonic acid is prepared by reaction of naphthalene with nonene, yielding diisononylnaphthalene. Diisononylnaphthalene then subsequently undergoes sulfonation.