A small portion of sulphurous acid, which contaminates it, may be removed by redistillation from a little acetate of lead.
The air was saturated with the acrid and unpleasant odor of sulphurous acid.
Much steam issues from the many fissures, accompanied by sulphurous acid gas.
sulphurous acid destroys the colour of solution of hematine.
From the same principle it is that the metallic oxyds dissolve without effervescence, and with great facility, in sulphurous acid.
sulphurous acid is best generated at the moment of using it.
This has long been my chief resource where I could not persuade the child to submit to the sulphurous acid spray.
sulphurous acid can fulfil in this instance a double function, viz.
Hydrochloric acid, sulphuretted hydrogen and sulphurous acid are rapidly oxidized by chloric acid.
sulphurous acid and lead are accidental contaminations; that of the latter often reaches 2%, making the acid poisonous.