Financial investors Triton Capital and Rhone Group remain the sole bidders for the Carbon Black unit of unlisted German chemical maker Evonik, two people familiar with the transaction told Reuters on Tuesday.

The deal is expected to be signed within the next 10 days and will probably value the unit at about €1 billion ($1.42 billion) including assumed debt, the sources also said.

Evonik and Rhone declined to comment. Triton was not immediately available for comment.