Acrid

a.
  1. Sharp and harsh, or bitter and not, to the taste; pungent; as, acrid salts.
  2. Causing heat and irritation; corrosive; as, acrid secretions.
  3. Caustic; bitter; bitterly irritating; as, acrid temper, mind, writing.
    4. Acrid poison ,
    a poison which irritates, corrodes, or burns the parts to which it is applied.