Wikipedia says mid-2015: https://en.wikipedia.org/wiki/Safety_data_sheet#United_States https://en.wikipedia.org/wiki/Safety_data_sheet#United_State... In pract

Wikipedia says mid-2015: https://en.wikipedia.org/wiki/Safety_data_sheet#United_States https://en.wikipedia.org/wiki/Safety_data_sheet#United_State... In practice, a lot of smaller companies are still distributing MSDS rather than SDS.