Dinonylnaphthylsulfonic acid (DINNSA) is an organic chemical, an aryl

sulfonic acid In organic chemistry, sulfonic acid (or sulphonic acid) refers to a member of the class of organosulfur compounds with the general formula , where R is an organic alkyl or aryl group and the group a sulfonyl hydroxide. As a substituent, it is kn ...

. Its melting point is 259.5 °C and its boiling point is 600.4 °C. It has very low water solubility. It is a moderate skin irritant and a strong eye irritant. It has low volatility and vapor pressure and is stable above 100 °C. Dinonylnaphthylsulfonic acid is used as an additive in industrial

lubricant A lubricant (sometimes shortened to lube) is a substance that helps to reduce friction between surfaces in mutual contact, which ultimately reduces the heat generated when the surfaces move. It may also have the function of transmitting forces, t ...

s, greases, cutting fluids, industrial coatings, and corrosion inhibitors. Its calcium and

barium Barium is a chemical element with the symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element. Th ...

salts (CAS numbers and , respectively) have generally the same use. Dinonylnaphthylsulfonic acid is a component of Stadis 450 which is an antistatic agent added to distillate

fuel A fuel is any material that can be made to react with other substances so that it releases energy as thermal energy or to be used for work. The concept was originally applied solely to those materials capable of releasing chemical energy but ...

s, solvents, commercial

jet fuel Jet fuel or aviation turbine fuel (ATF, also abbreviated avtur) is a type of aviation fuel designed for use in aircraft powered by gas-turbine engines. It is colorless to straw-colored in appearance. The most commonly used fuels for commercial a ...

s, and to the military JP-8 fuel to increase the

electrical conductivity Electrical resistivity (also called specific electrical resistance or volume resistivity) is a fundamental property of a material that measures how strongly it resists electric current. A low resistivity indicates a material that readily allow ...

of the fluid. Fluids with increased conductivity more readily dissipate static charges to mitigate the risk of explosions or fires due to Static Discharge Ignitions Dinonylnaphthylsulfonic acid by itself does not function as an anti-static additive. Dinonylnaphthylsulfonic acid is prepared by reaction of

naphthalene Naphthalene is an organic compound with formula . It is the simplest polycyclic aromatic hydrocarbon, and is a white crystalline solid with a characteristic odor that is detectable at concentrations as low as 0.08 ppm by mass. As an aromati ...

with nonene, yielding diisononylnaphthalene. Diisononylnaphthalene then undergoes sulfonation.

External links

EPA: Dinonylnaphthalene category
{{Motor fuel Sulfonic acids Antistatic agents Fuel additives