What does peptization mean?
Peptization is a chemical process in which an insoluble precipitate or aggregated material is dispersed again to form a colloid. It often occurs when a suitable electrolyte is added in a controlled amount, causing particles that had come together to separate and remain dispersed throughout a liquid. The process is commonly described as the reverse of coagulation, in which colloidal particles gather into larger aggregates or form a precipitate. Peptization is important in colloid chemistry, analytical chemistry, and industries involving clays, pigments, pharmaceuticals, and other finely divided materials. Although its name reflects the ancient association between digestion and dissolving or dispersing substances, modern usage refers specifically to the physical-chemical dispersion of a precipitate rather than to biological digestion. The word is uncommon outside specialist contexts and is chiefly encountered in scientific and technical writing.
nounThe chemical process of dispersing an insoluble precipitate as a colloid, often by adding a suitable electrolyte. It is generally the reverse of coagulation.
- The process of dispersing an insoluble precipitate as a colloid, typically through the action of a suitable electrolyte.
"The addition of a small amount of electrolyte caused peptization of the precipitate."
"Careful control of the electrolyte concentration prevented peptization of the suspension."
"The colloid was stabilized against peptization by a suitable protective agent."
Plural forms are used when referring to multiple occurrences of the process.
"The chemist compared the peptizations of two different colloids."
Peptization reverses coagulation: it turns an aggregated precipitate back into a dispersed colloid.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of peptization
Peptization derives from the verb “peptize,” which in turn comes from Greek peptizein, “to digest,” and ultimately from the root associated with cooking or softening. Although the original chemical term was associated with the dissolution of a precipitate, it now denotes the formation of a dispersed colloidal system. Its relative “peptic” and the related terms “pepsin” and “peptone” share the same Greek digestive root.
Related word forms
How peptization is actually used
This is specialized chemistry terminology. The British spelling is commonly “peptisation,” while the American spelling is “peptization.” The term is distinct from biological digestion, although it derives from the same Greek root associated with digestion.