It looks like it actually reverses sexual characteristics without reversing chromosomes, meaning the males that have reversed sexual characteristics are still technically genetically male.
"The resulting larvae were all male when raised to metamorphosis and sampled (n = 100), confirming that atrazine-induced females were, in fact, chromosomal males. Furthermore, atrazine-induced females lacked the DM-W further confirming that these atrazine-induced females were indeed chromosomal males (Fig. 2). These ZZ females expressed gonadal aromatase, as did true ZW females (n = 4, from our stock colony), but ZZ males (n = 8, control or treated) did not"
I was more commenting on the first line of your comment, where you said that they were changing sex, but I don't think intersex is accurate either, as intersex traits are present at birth. In the study, they raised the male frogs to maturity before exposing them to atrazine, after which 10% had their adult male characteristics reversed to that of a female.
Personally I also think something shown to have such effects on wildlife should be banned, and definitely should not be in our food. It is banned in some countries.
"The resulting larvae were all male when raised to metamorphosis and sampled (n = 100), confirming that atrazine-induced females were, in fact, chromosomal males. Furthermore, atrazine-induced females lacked the DM-W further confirming that these atrazine-induced females were indeed chromosomal males (Fig. 2). These ZZ females expressed gonadal aromatase, as did true ZW females (n = 4, from our stock colony), but ZZ males (n = 8, control or treated) did not"
https://pmc.ncbi.nlm.nih.gov/articles/PMC2842049/