Aphronitre, or aphronitrum, is a kind of nitre, mentioned in ancient texts. It was supposed to be the foam or froth of a liquid, emerging to the top. Naturalists have taken the ancient aphronitre to have been a native saltpetre.

•  This article incorporates text from a publication now in the public domain: Chambers, Ephraim, ed. (1728). "Aphronitre". Cyclopædia, or an Universal Dictionary of Arts and Sciences (1st ed.). James and John Knapton, et al.
• digicoll.library.wisc.edu

• Potassium nitrate

This inorganic compound–related article is a stub. You can help Wikipedia by expanding it.

• v
• t
• e