525. A dinnerware manufacturer wants to know if she has to report aluminum oxide in her clay, which is a raw material for her product.
Aluminum oxide in clay is usually part of another compound or mineral, such as kaolin, and is not present as a listed toxic chemical. In addition, it is unlikely the clay contains man-made, fibrous forms of aluminum oxide. Naturally occurring aluminum oxide, known as corundum, has a separate CAS number, 1302-74-5, and is not reportable.