• Products on List O
• How to use list O products effectively
• How to check if a product is on list O
• Additional Resources

Products on List O

This list is comprised of products reviewed under EPA's Emerging Viral Pathogen Policy (EVP) because of an outbreak of Rabbit Hemorrhagic Disease Virus (RHDV2) and an absence of products registered specifically for RHDV2. This guidance was triggered in July 2020.

EPA expects all products on this list to be effective against RHDV2 when used according to the label directions. All products on this list have demonstrated efficacy against two viruses as hard to kill as RHDV2.

Top of Page

How to Use List O Products Effectively

A product’s effectiveness can change depending on how you use it, and some pathogens are more difficult to kill than others. Because of this, disinfectants may have different directions for different pathogens.

Always check that the product's label includes directions for use for the pathogen on List O. For example, if List O indicates that a product will kill RHDV2 if you follow the directions for rotavirus, make sure the label contains directions for use against rotavirus.

Top of Page

How to Check if a Product is On List O

Disinfectant products may be marketed and sold under different brand and product names. To determine whether EPA expects a given product to kill RHDV2, you need to determine whether its primary registration number is on this list.

• First, find the registration number on the product label. Look for “EPA Reg. No.” followed by two or three sets of numbers.
• If your product's registration number has two parts (ex. 1234-12), it has a primary registration number. If this number is on List O, the product is qualified for use against RHDV2.
• If your product's registration number has three parts (ex. 1234-12-123), you have a supplemental distributor product. These products have the same chemical composition and efficacy as primary products, but often have different brand or product names. If the first two parts of this registration number (ex. 1234-12) are on List O, the product is qualified for use against RHDV2. (The first two parts of this registration number reflect the primary registration, while the third identifies the distributor’s EPA company number.)
• Regardless of whether you are using a primary registration product or a supplemental distributor product, always check that the product's label includes directions for use for the pathogen on List O.

Information about listed products is current as of the date on this list. Inclusion on this list does not constitute an endorsement by EPA.

Additional Resources

• Still have questions? Read our FAQs about this list
• See Cleaning and Disinfection Guidance from USDA
• View more information about lists of registered antimicrobial products

Top of Page