Current scientific research shows no direct evidence that titanium dioxide acts as a hormone disruptor.

Titanium dioxide is a commonly used substance in various products like sunscreen and food coloring due to its bright, white pigmentation.

There have been some concerns about its nanoparticle form, but the European Food Safety Authority re-evaluated its safety and maintained that it was not of concern.

However, to appease public concern, further research is ongoing.

No, you should not use PVC cement on ABS plastic. PVC (Polyvinyl Chloride) cement and ABS (Acrylonitrile Butadiene Styrene) cement are formulated differently due to the distinct chemical properties of these materials. PVC cement is designed to weld PVC pipes by dissolving the surface of the PVC, creating a chemical bond. ABS cement, on the other hand, is specifically formulated for ABS materials. Using PVC cement on ABS will not create a secure bond and can lead to joint failure. For a proper bond between ABS components, it's essential to use ABS cement. In cases where both PVC and ABS need to be joined, a special transition cement or approved mechanical coupling should be used.

Titanium dioxide is a common additive in many products, including food and cosmetics, due to its brightness and strong adhesion properties. According to the FDA, it's considered a safe substance for general use. However, it is inadvisable to intentionally feed this to your dog or any pets as their bodies may react differently than humans. It's not associated usually with toxicity in dogs, but could potentially cause digestive upset, especially in larger amounts. Keep in mind that pet food and treats do not require coloring or additives for nutritional needs, and natural options are always best. In sum, titanium dioxide isn't notably harmful for dogs but should not be intentionally introduced into their diets.