Ammonia is root of the odor in cat urine.
Ammonia as a solid crystallizes into symmetrical cubics. It's also miscible with water and can be boiled off.
In animals it typically binds with an acid and becomes urea and is a key component to reduction of pH levels in organisms.
Vinegar helps to break down urea into its base components for cleaning purposes. Baking soda (sodium bicarbonate) neutralizes any acid. Bulk sodium bicarbonate can be purchased as soda ash and is relatively inexpensive compared to grocery store baking soda. Pool supply retailers will carry this as it is used to reduce acidity level in swimming pools.