What aspect of a chemical's nature should be assessed to determine its danger?

To determine the danger of a chemical, assessing its toxicity is crucial. Toxicity refers to the degree to which a substance can cause harm to living organisms. This includes understanding both the short-term and long-term health effects that exposure to the chemical can have on individuals, including potential acute or chronic responses.

Evaluating toxicity provides valuable information about the safe handling and application of the chemical, which is essential for maintaining safety standards in cosmetology and other health-related fields. Factors like dosage, route of exposure, and individual susceptibility contribute to a chemical's overall risk assessment.

While brand reputation, price, and packaging may provide insight into broader aspects of the product, they do not directly inform the inherent dangers associated with the chemical itself. Toxicity is a scientific measure that can directly impact health and safety practices, making it the most relevant factor in evaluating the danger posed by a chemical.