This is just a variety of ordinary cement and it is prepared from such raw materials, which are practically free from colouring oxides of iron, manganese or chromium. White cement is so called because the raw materials are so called that the maximum iron oxide content is strictly limited to 1 percent.
It is used primarily for decorative purposes like plaster work, ornamental work. But most white cements can be used as a replacement for ordinary portland cement for structural work. A variety of colours can be obtained by the addition of pigments. It should not set earlier than 30 minutes.