What is a sign of dangerous goods spillage?

A sign of dangerous goods spillage is often associated with a bad smell. This is because many hazardous materials, especially chemicals, emit distinctive and sometimes noxious odors when they leak or spill. The presence of a strong smell can indicate chemical reactions or the release of volatile compounds, suggesting that there is a significant risk to health and safety. Recognizing these odors quickly is crucial for the personnel involved in managing the situation, as it can guide their response and protect themselves and others from potential harm.

In contrast, while strong light emission may indicate certain chemical reactions or processes, it is less reliable as a general indicator of spillage. Cold temperature might result from specific chemicals but is not a common sign of spillage. Bright colors can be seen in some hazardous materials, but they do not necessarily indicate spillage and can often be present in materials without posing any risk. Thus, the bad smell serves as a more universally recognized alert to potential dangers associated with spills of hazardous goods.