When procuring titanium slag, the primary focus must be on the TiO2 (Titanium Dioxide) content, which typically ranges from 75% to 90% depending on whether it is acid-soluble or chlorination-grade. Buyers should also strictly monitor the levels of impurities such as FeO (Iron Oxide), SiO2 (Silica), and MgO (Magnesium Oxide), as high impurity levels can significantly increase processing costs in downstream pigment or metal production. Additionally, verify the particle size distribution to ensure compatibility with your specific smelting or chemical leaching equipment.