Shares rose 1.55% to $260.60 on Thursday, beating gains by Procter & Gamble, Waste Management and Colgate-Palmolive.
The advance ended a four-day losing streak during a broad market rally that lifted the S&P 500 1.02% and the Dow Jones Industrial Average 1.62%.
Ecolab still closed 15.74% below its 52-week high of $309.27 reached on 24 February, while trading volume of 1.4 million stayed below its 50-day average.
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