We look back on a history of successful technology and portfolio developments.

  • 2020

    CyPlus GmbH moved its company headquarters from Hanau to Darmstadt in June 2020.


  • 2019

    As of August 2019 CyPlus GmbH is part of Röhm Group, a 100% subsidiary of Advent International.

    Founded in 1984, Advent International is one of the largest global private equity investors.

  • 2016

    CyPlus Idesa produced its first sodium cyanide.

  • 2013

    Grupo Idesa and CyPlus entered a joint venture to build a sodium cyanide plant in Coatzacoalcos, Mexico. The plant was designed with state-of the art technologies and has a production capacity of 40,000 metric tons a year.

  • 2010

    CyPlus started SLS Technology ex Wesseling plant.

  • 2008

    Activities in USA and Canada were divested.

  • 2007

    CyPlus GmbH’s cyanide plant in Wesseling celebrated its fiftieth anniversary.

  • 2003

    CyPlus GmbH was formed from Degussa’s Mining Chemicals Line.

  • 2000

    Degussa branded its cyanide products with the registered trademark CyPlus®.
    The website www.cyplus.com was introduced.

  • 1998

    Degussa opened its Canadian terminal in Cadillac, QC, Canada.

  • 1995

    Increase of the cyanide product range by special technical and engineering support. Products now known as CyPlus® CCS, CyPlus® SLS and many more were introduced to the market to increase the product range.

  • 1992

    Degussa formed a 50/50 joint venture, Cyanco, with Mining Services International (later to become Nevada Chemicals, Inc.) to market sodium cyanide solution within the USA. Cyanco is located in Winnemucca, NV, USA.

  • 1975

    Degussa built a second plant in Wesseling to produce hydrogen cyanide by converting methane with ammonia. This process is called the BMA process and is still in use today in Wesseling to produce CyPlus® cyanides.

  • 1957

    Sodium Cyanide production began in Wesseling, Germany.

  • 1952

    Degussa started production of hydrocyanic acid (HCN) at its new plant in Wesseling, Germany.

  • 1901

    With the development of the Castner process the “cyanide eggs”, a product known all over the world, were produced by Degussa’s Frankfurt Plant II.

  • 1864

    Hector Roessler, the owner of a small chemical plant in Frankfurt am Main, started producing Potassium Cyanide (KCN). Some years later this plant was incorporated into Degussa AG, which was founded in 1873.