Technology

I beg to differ. It should be required that manufacturers of such chemicals do the research to show that their product is safe before they allow its manufacture and workers to be exposed and the chemical to be dumped into the environment.

From the Guardian article linked to in OP's article:

The EPA acknowledged in its approvals that it does not know the level at which the chemicals are “acutely lethal” or cause other serious health damage, but the agency still approved them anyway, said Jonathan Kalmuss-Katz, an attorney with the Earthjustice nonprofit, which filed the suit.

The EPA knows that the chemicals are harmful, but doesn't know how harmful yet approved them anyway. As for the facts, that's kind of hard to get since:

The two compounds approved by the Environmental Protection Agency (EPA) for import and immediate use in facilities across the US are photoacid generators that also appear to be Pfas “forever chemicals”, though it is unclear because much of the EPA documents are redacted . Some Pfas are commonly used in the production of semiconductors.

Emphasis mine. They've approved chemicals for use in manufacturing and have redacted much of the approval notice so that no one can double check their work. If this lawsuit fails, we may not know how bad these chemicals are until they are sickening and killing workers and wildlife.