Millennium ZOSF Zirconium sulfate Millennium Chemicals Filler Coatings Various grades of high performance Zirconium Sulphate are supplied by Millennium Chemicals. Millennium-ZOSF is supplied as a solution and is ready for use in Titanium Dioxide pigment coating. This product is optimized for this application due to the incorporation of specialty additives. This product may also be used for leather tanning. No additional processing is required for the use of this product. High performance solution of zirconium sulfate. Used in pigment coating.