Original sentence: The perfluorooctanesulfonyl fluoride-based chemistry that was used to make sulfonamides like PFOSA was discontinued by 3M in the United States (US) in 2001 but it has grown in China by other producers
Edited sentence: The perfluorooctanesulfonyl fluoride-based chemistry that was used to make sulfonamides like PFOSA was phased out by 3M in the United States (US) during 2000–2002 but it has grown in China by other producers