For the history of acquired businesses of Nalco , see Nalco Holding Company .
This article is about the consolidated history of the 1986 established Ecolab Inc. ; including its foundation in 1923 as Economics Laboratory , and the acquisition of Nalco in 2011 .
For the history of acquired businesses of Nalco , see Nalco     .
This article is about the consolidated history of the 1986 established Ecolab Inc. ; including its foundation in 1923 as Economics Laboratory , and the acquisition of Nalco in 2011 .