Any of several barren tracts of level ground, in the southwestern United States, covered with a layer of natron.

(dated, chemistry) sodium amide

(chemistry) A white solid, NaNH₂ obtained by reacting ammonia with metallic sodium; it is used in the production of hydrazine, and indigo dyes.

the alkaline waste material that is a byproduct of the Leblanc process

(chemistry) any of several industrial processes that either use or manufacture sodium hydroxide, but especially a method of making paper from wood pulp

(inorganic chemistry, chiefly Britain) Alternative spelling of sulfite of soda

(chemistry) A salt, Na₂CO₃ formally derived from sodium hydroxide and carbonic acid; it is a white powder, soluble in water, with domestic, commercial and industrial uses; it occurs naturally as natrite

sodium nitrate

sodium bicarbonate

(chemistry) The sodium salt of stearic acid; a constituent of soap.