Zinkstearat (Zn (C 18 H 35 O 2) 2, also Octadecansäure zinc salt) is the zinc salt of stearic acid.


is a white powder with a melting point of 130 °C, a flash point of 277 °C and a Selbstentzündungstemperatur of 420 °C. The molecular weight is with 632.3, the relative density with 1,1. Zinkstearat is not water soluble.

With the heating of Zinkstearat the corrosive and poisonous zinc oxide develops, also with the burn develops poisonous steams and gases. With contact with Zinkstearat the skin, the eyes reddens itself reacts likewise with turning red, pain and reduction of the sight. The inhalation of the powder entails coughs and sore throats, swallowing leads to nausea, vomiting and failure.

When being busy with Zinkstearat therefore a propagation of the dust is to be avoided. Likewise must be paid attention to the danger of a dust explosion or an electrostatic loading.


Zinkstearat is used as emulsion stabilizer.


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