On May 23, 2022, the Vinyl Institute, Inc. (VI) filed suit in the U.S. Court of Appeals for the District of Columbia against the U.S. Environmental Protection Agency (EPA), seeking review of EPA’s March 2022 test order for 1,1,2-trichloroethane issued under Section 4(a)(2) of the Toxic Substances Control Act (TSCA). As reported in our March 25, 2022, blog item, EPA announced on March 24, 2022, that it issued a second round of test orders under TSCA Section 4 to obtain additional data on eight of the next 20 chemicals undergoing risk evaluation. The VI seeks judicial review of the test order under federal law, including but not limited to the Administrative Procedure Act (APA), TSCA, and EPA’s regulations promulgated thereunder. The VI seeks a determination that, inter alia, the test order violates these authorities; is arbitrary, capricious, an abuse of discretion, and otherwise not in accordance with the law; is in excess of statutory jurisdiction, authority, or limitations, or short of statutory right; is without observance of procedure required by law; is unsupported by substantial evidence; and is otherwise contrary to law. The VI asks that the court hold unlawful, vacate, enjoin, set aside, and remand the test order.