foam of lead = litharge, n. foam of nitre = aphronitre, n. foam of oil = lee, n.2 foam of copperas = colcothar, n. Obsolete.

The brownish red peroxide of iron which remains in the retort after the distillation of sulphuric acid from iron sulphate.

Chemistry. Originally: the compound of oxygen with a specified element which contains the greatest possible proportion of oxygen. Now usually: a…

= nitrogen trioxide n. (b) at nitrogen, n. compounds 2.

Originally: an oxide containing a very high proportion of oxygen. Now: an oxide containing the anion O2 −; the anion itself. Cf. peroxide, n. 1.

= nitrogen trioxide n. (b) at nitrogen, n. compounds 2.

= peroxide, v.

A preparation consisting largely of calcium peroxide or sodium peroxide, which releases oxygen on reaction with carbon dioxide.

a colourless, viscous, somewhat unstable liquid, H2O2, which can act as an oxidizing and a reducing agent, is usually prepared as an aqueous…