Glyphosate was classified as a category C substance (limited evidence of carcinogenicity) in 1985 and a category E (no carcinogenic potential) in 1991 by the EPA.

“glyphosate has an interesting history of carcinogenic classification uh originally classified as a category c substance uh showing limited evidence of carcinogenicity originally classified or in 1985 classified as a category c substance in 1991 apa changed it to category e substances that do not show carcinogenic potential but in march of 2015 the iarc international agency for research on cancer in leon france a department of the who labeled glyphosate as possibly carcinogenic to humans to a category”