EPA Withdraws Two Proposed Rules
That Would Have Required Toxicity Tests

The Environmental Protection Agency withdrew a proposed rule Sept. 14 that would have required chemical manufacturers to test four chemicals commonly found at superfund sites and another that would have required tests be conducted on 21 hazardous air pollutants (75 Fed. Reg. 55,728).

The withdrawal means the manufacturers and processors of those chemicals will not have to generate the toxicity data EPA sought. EPA had proposed to require toxicity tests for chloroethane (CAS No. 75-00-3), hydrogen cyanide (CAS No. 74-90-8), sodium cyanide (CAS No. 143-33-9), and methylene chloride (CAS No. 75-09-2).

EPA issued the first proposed rule ...