drysalter

Etymology
From.

Noun

 * 1)  A dealer in chemicals used in the arts (oils, preservatives etc.) as well as, often, preserved foodstuffs including pickles or salted meats.
 * 2) * 1790,, in Danziger & Brady (eds.), Boswell: The Great Biographer (Journals 1789–1795), Yale 1989, p. 82:
 * How striking it was to find such sentiments in a man who had risen from nothing to a great fortune, as a dry-salter in London.