内容简介：
【主要内容】 C&EN’s annual ranking of U.S chemical makers has gotten a new look. The Top 75 U.S. Chemical Producers ranking has become the Top 50 U.S. Chemical Producers.
This year, C&EN’s list includes U.S.-owned companies only. Foreign-owned companies used to be included in the ranking, but now C&EN runs a separate ranking of the U.S. sales of the top 25 foreign companies.
The ranking was modified to reflect changing times in the chemical industry. By ranking U.S. and foreign-owned companies together, C&EN pitted global sales of U.S. chemical companies against the sales administered by the U.S. headquarters of overseas producers.
