Isostearic acid

Author: Prof. Dr. med. Peter Altmeyer

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Last updated on: 29.10.2020

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Margaric acid; Octadecanoic acid

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Isostearic acid is an organic compound from the group of branched alkanoic acids (fatty acid). Chemically, it is heptadecanoic acid, which is substituted with a methyl group at position 16.

The 16-methylheptadecanoic acid is a slightly yellowish, fatty substance melting at about 68 C°. It is insoluble in water. The name "iso-stearic acid" is based on its structural similarity to stearic acid. Stearic acid (octadecanoic acid) is a linear chain made up of 18 C atoms. Isostearic acid is branched at the end of the chain (17 C atoms) with a methyl group (= iso).

General information
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Isostearic acid is a fatty acid whose compounds (mostly ester compounds) are widely used in cosmetic formulations. The compounds of isostearic acid play an important role as texture hardeners in plasters and ointments.

Representatives are:

  • Isostearic acid (INCI). Isooctadecanoic acid. Function: binding, emulsifying, surfactant, cleaning
  • butyl isostearate (INCI). Isostearic acid, 3-octadecyloxy-2-hydroxypropyl ester. Chimyl isostearate (INCI). Isostearic acid, 3-hexadecyloxy-2-hydroxypropyl ester. Cholesteryl isostearate (INCI).
  • Decyl isostearate (INCI).
  • Dihydrocholesteryl isostearate (INCI).
  • Dimethyl lauramine isostearate (INCI).
  • Ethyl isostearate (INCI). Isooctadecanoic acid, ethyl ester.
  • Ethylhexyl isostearate (INCI). Isooctadecanoic acid, 2-ethylhexyl ester. Function: softening
  • Arachidyl glycol isostearate (INCI). 1-isostearoyl-1,2-eicosanediol.
  • Glyceryl diisostearate (INCI). diisooctadecanoic acid.
  • Glyceryl isostearate (INCI).
  • Hexacosyl glycol isostearate (INCI). Isooctadecanoic acid, ester with 1,2-hexacosanediol.
  • Hexyl isostearate (INCI).
  • Hydrogenated castor oil isostearate (INCI). Isooctadecanoic acid.
  • Hydroxycetyl isostearate (INCI). Isooctanoic acid.
  • Isocetyl isostearate (INCI).
  • Isopropyl isostearate (INCI).
  • Isopropyl titanium triisostearate (INCI).
  • Tris(isooctadecanoato-O)(propane-2-olato)titanium.
  • Isosteryl isostearates (INCI). isooctadecyl isooctadecanoate.
  • Lauryl isostearate (INCI).
  • Methyl glucose isostearate (INCI).
  • Methyl isostearate (INCI).
  • Myristyl isostearate (INCI).
  • Octacosanyl glycol isostearate (INCI).
  • Octyldodecyl isostearate (INCI).
  • Polyglyceryl-2 diisostearate (INCI).
  • Polyglyceryl-2 isostearate (INCI).
  • Polyglyceryl-2 sesquiisostearate (INCI). Diisooctadecanoic acid.
  • Polyglyceryl-2 tetraisostearate (INCI).
  • Polyglyceryl-2 triisostearte (INCI).
  • Polyglyceryl-3 diisotearte (INCI).
  • Polyglyceryl-3 isostearte (INCI).
  • Polyglyceryl-4 isostearate (INCI).
  • Polyglyceryl-5 isostearate (INCI).
  • Polyglyceryl-6 isostearate (INCI).
  • Polyglyceryl-10 diisostearates (INCI).
  • Polyglyceryl-10 isostearate (INCI).


Last updated on: 29.10.2020