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EPA Extends Comment Period for Isothiazolinones Draft Risk Assessments

For Release: July 20, 2020

The U.S. Environmental Protection Agency (EPA) is extending the comment period for five draft human health and ecological risk assessments for isothiazolinones. Isothiazolinones are a class of chemicals commonly used as material preservatives in countertops, food packaging, paint, and household cleaning products.

On May 14, 2020, EPA posted the draft risk assessments and supporting files listed below for public comment as part of the registration review process required under the Federal Insecticide, Fungicide and Rodenticide Act. The initial closing date for the public comment period was Aug. 13, 2020. EPA is extending the public comment period for an additional 90 days, closing on Nov. 10, 2020.

The draft risk assessments and supporting documents are available via in the registration review dockets listed below:

Registration Review Case Name and Number Docket ID Number
MIT/CMIT Case 3092 EPA-HQ-OPP-2013-0605
OIT Case 2475 EPA-HQ-OPP-2014-0160
BIT Case 3026 EPA-HQ-OPP-2014-0159
BBIT Case 5017 EPA-HQ-OPP-2015-0736
DCOIT Case 5023 EPA-HQ-OPP-2014-0403

When submitting comments, identify the docket ID for the specific pesticide of interest. Throughout the COVID-19 public health emergency, EPA recommends submitting comments electronically through the Federal eRulemaking Portal at