The above products are used as flame-retardant fillers in plastics and rubber, as mordants in the textile industry, and in cough mixtures and products against hyperacidity in the pharmaceutical industry, etc., etc.

The required end-product fineness is in the range d97 = 2.0 to 3.0 µm, the d50 between 1.0 and 1.5 µm, and the d10 at 0.5 - 0.7 µm. For some applications, the products need to be coated.