Organic N-nitroso compounds are a class of chemical substances characterized by the presence of an nitroso group (NO) attached to a nitrogen atom. These compounds play significant roles in various fields including pharmaceuticals, agriculture, and environmental science. In pharmaceuticals, certain organic N-nitroso compounds have shown potential as antimicrobial agents due to their ability to react with biological macromolecules, leading to their use in the development of new drugs. In agriculture, they can serve as biocides or fungicides. However, many of these compounds are considered potentially harmful, with some being classified as carcinogens. Therefore, strict regulatory controls and safety assessments are necessary when handling or using organic N-nitroso compounds. Their synthesis and application require careful consideration to ensure safety and efficacy in diverse industrial settings.