Ecolab Inc., a maker of cleaning, sanitation and maintenance products, announced its Chairman, Allan L. Schuman, will retire May 12, and will be replaced by President and Chief Executive Douglas M. Baker.

Schuman, 71, joined Ecolab in 1957 as a junior salesman and has since served in a variety of management positions, including CEO, the company said. Baker, 47, has been CEO since 2004, Ecolab added.