What is a limitation of using Penta as a preservative?

Using Penta, or pentachlorophenol, as a wood preservative presents limitations primarily due to its potential for environmental contamination. Specifically, it cannot be used in areas where food or water could be contaminated. This is a crucial consideration because Penta is known for its toxicity and persistence in the environment, which poses risks to both human health and the ecosystem when it leaches into soil and water sources. Therefore, regulations typically restrict its application in sensitive areas to prevent any risk of contamination.

The other options do not accurately reflect the limitations of Penta. It is not beneficial for plant growth, as it can be harmful to them, nor is it considered non-toxic to humans; in fact, it is regarded as hazardous. Additionally, while Penta is effective in many weather conditions, it is not universally effective in all settings and may degrade over time or under specific environmental conditions.