A recent article asking the same thing on Tampa Bay's activities

While there doesn't seem to be obvious red flags of harm, something doesn't feel right to me about dumping chemicals into the environment that eventually break down. The article says the company making this particular dye warns about it in higher quantities or letting it become concentrated in places downstream, and wearing protective equipment when handling the larger amounts. How much of that is only legalize to protect from misuse vs. actual tested issues?