Which of the following is considered a toxic paint?

Cadmium is considered a toxic paint due to the presence of cadmium compounds, which are harmful to health if ingested or inhaled. These compounds can cause serious health issues, including kidney damage, cancer, and respiratory problems upon long-term exposure. Artists who work with cadmium pigments should take precautions, such as using gloves and masks, and work in well-ventilated areas to minimize the risk of exposure.

In contrast, iron oxide pigments are generally regarded as safe and are widely used in various applications, including art. Alumina is typically used as a filler or an additive in paints and is also non-toxic. Zinc white, while it can have some health risks associated with overexposure, is not classified with the same level of toxicity as cadmium.