Which chemical property of ammonia makes it important to monitor for potential hazards?

The chemical property of ammonia that is crucial for monitoring potential hazards is its toxicity. Ammonia is a colorless gas with a sharp, pungent odor, and it can be harmful or even fatal if inhaled in sufficient concentrations. It can irritate the respiratory system, eyes, and skin, leading to severe health effects. Monitoring for ammonia is essential in various environments, such as industrial settings and agricultural applications, to prevent exposure that can result in acute or chronic health issues.

While the other properties, such as flammability and solubility in water, are important, they are not as critical for assessing the immediate health hazards posed by ammonia. Ammonia's odor, although strong, becomes less relevant at higher concentrations, potentially masking its presence as a dangerous substance. Thus, understanding its toxicity is key to ensuring safety and implementing appropriate hazard control measures.