Amines are organic compounds derived from ammonia (NH3) by replacing one or more hydrogen atoms with organic groups. They can be classified into primary, secondary, and tertiary amines based on the number of carbon-containing groups attached to the nitrogen atom. Amines are commonly found in nature and play essential roles in biological processes, such as in the structure of amino acids and neurotransmitters. These compounds often have distinct odors and can be basic in nature, meaning they can accept protons (H+). Amines are used in various applications, including pharmaceuticals, dyes, and agricultural chemicals. Their versatility makes them important in both industrial and research settings.