Here's why:

* It does not contain carbon-hydrogen bonds. Organic compounds are defined by the presence of carbon-hydrogen bonds. Ammonium acetate (NH₄CH₃COO) has nitrogen and carbon, but they are not directly bonded.

* It is a salt. Ammonium acetate is formed by the reaction of a weak base (ammonia, NH₃) and a weak acid (acetic acid, CH₃COOH). Salts are typically classified as inorganic compounds.

While ammonium acetate contains a component derived from acetic acid (an organic compound), the overall compound is classified as inorganic due to the lack of direct carbon-hydrogen bonds.