Illustrated Glossary of Organic Chemistry
Anhydrous: Without water;
dry.
Pure sulfuric
acid (H2SO4)
is anhydrous. Hydrogen
chloride (HCl)
is anhydrous, whereas hydrochloric
acid (aqueous
H3O+
Cl-; prepared
by dissolving hydrogen
chloride in water)
has no appreciable levels of
HCl
present.
