EPA chemical rules complicate supply chain adjustments in face of tariffs

Companies that rework their supply chains to account for President Trump’s frequent changes to tariffs on imported goods or components risk running afoul of strict, often obscure Environmental Protection Agency chemical-safety rules that distinguish between even near-identical substances and require lengthy reviews for “new” chemicals, a former top official with the agency says. “Even if it’s an identical chemical, sometimes depending on the particulars … it can make a difference. It can make an important difference,” said Jim Aidala, who...