Pulp & Paper
Pulp & Paper

Hydrosulfite / Blankit® - Our quality for your success 

Hydrosulfite and Blankit® are white, microcrystalline powders with a sodium dithionite (Na2S2O4) as main component. They serve mainly as a bleaching or reducing agent for applications in textile, paper or mineral industry.


BASF knows all about paper manufacturing – a fact which enables us to provide Hydrosulfite / Blankit® products tailor-made for the industry’s specific needs.

Thus, we focus not only on the bleaching processes we examine processes from start to finish - from energy use to waste water disposal. With Hydrosulfite / Blankit®, you may replace an expensive raw material such as cellulose with a cheaper one like waste paper. Thereby, you reduce costs and preserve the environment.

An additional benefit: The sensitive Hydrosulfite / Blankit® bleach does not only help to protect the environment – thanks to a reduced number of impurities, the paper fibers are also protected.

Woman’s hand launching white paper airplane outdoors.

Your advantages at a glance:

  • Cost-effective and efficient
  • Fiber sparing and environment-friendly
  • Broad product range for a huge variety of applications

Hydrosulfite by BASF – A success story since more than 100 years

In 1904, the BASF-researcher Max Balzen developed the first stable hydrosulfite worldwide. To date, BASF is still known as the technology leader and largest producer of hydrosulfite in Europe.