Docket Number: EPA-HQ-OPP-2015-0262 

www.regulations.gov 

N-Butyl Mercaptan 

Notice of Registration Review Case Closure 

January 2016 
N-Butyl Mercaptan 

Approved by: 

Date: 

N-Butyl Mercaptan 

EPA-HQ-OPP-20 15-0262 

www.regularions.gov 

Notice of Registration Review Case Closure 

Case Number 6055 

Robert McNally, 

Director 

Biopesticides and Pollution Prevention Division 

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N-Butyl Mercaptan 

TABLE OF CONTENTS 

EPA-HQ-OPP-20 15-0262 

www.regulations.gov 

I. INTRODUCTION .............................................. .......... ...................... ................................................. 4 

II. BACKGROUND INFORMATION .................................................................................................... 4 

III. REGISTRATION REVIEW CASE CLOSURE ............................. . .. . .. . .. ...... . ... .............. 5 

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N-Butyl Mercaptan EPA-HQ-OPP-20 15-0262 

www.regulations.gov 

I. INTRODUCTION 

The Food Quality Protection Act (FQPA) of 1996, mandated a registration review program. All 

pesticides distributed or sold in the United States (U.S.) generally must be registered by the 

Environmental Protection Agency (EPA or the Agency), based on scientific data showing that they will 

not cause unreasonable risks to human health or the environment when used as directed on product 

labeling. The registration review program is intended to make sure that, as the ability to assess risk 

evolves and as policies and practices change, all registered pesticides continue to meet the statutory 

standard of no unreasonable adverse effects to human health or the environment. Changes in science, 

public policy, and pesticide use practices will occur over time. Through the registration review program, 

the Agency periodically reevaluates pesticides to make sure that as change occurs, products in the 

marketplace can be safely used. Information on this program is provided on EPA's website. 1 

In 2006, the Agency implemented the Registration Review program pursuant to FTFRA Section 3(g), 

and will review each registered pesticide every 15 years to determine whether it continues to meet the 

FIFRA standard for registration. 

Pursuant to 40 CFR § 155.50, the Agency formally initiated registration review for N-Butyl 

Mercaptan (case 6055) in June 2015. The following timeline highlights significant events that have 

occurred regarding the registration review ofN-Butyl Mercaptan: 

• June 24,2015- Publication of theN-Butyl Mercaptan Preliminary Work Plan and Summary 

Document inN-Butyl Mercaptan Docket (EPA-HQ-OPP-20 15-0262) for a 60-day public 

comment period. No comments were received. 

November 13, 20 15 - Publication of a final Cancellation Order for all N-Butyl Mercaptan product 

registrations in the Federal Register (80 FR 70206, FRL-9934-46). 

II. BACKGROUND INFORMATION 

N-Butyl Mercaptan is an animal repellent that was previously registered for use to control deer and 

other foraging animals from damaging ornamental plantings, shrubs, trees, and orchards. N-Butyl 

Mercaptan is not currently manufactured for use as a pesticide. All registrations for N-Butyl Mercaptan 

have been canceled as discussed below. 

In the course of registration review for N-Butyl Mercaptan, on November 13, 2015, the Agency 

issued a final cancellation order advising the sole registrant that under Section 4(i)(5)(G) of the Federal 

Insecticide, Fungicide and Rodenticide Act (FIFRA), as amended, the Agency cancels the registration 

(EPA Reg. No. 65615-7, end-use formulation) for non-payment of the annual registration maintenance 

fee (copy of the notice is included in the docket for this registration review). EPA Reg. No. 65615-7, 

Scoot Deer & Rabbit Repellent, was the last N-Butyl Mercaptan pesticide product registration in the 

United States. 

1 http://www.epa.gov/oppsrrd 1/registration_review/ 

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N-Butyl Mercaptan EPA-HQ-OPP-20 15-0262 

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The existing stocks provisions for these products are as follows: The registrant was allowed to 

continue to sell and distribute existing stocks until January I 5, 2016, which was o ne year after the date 

o n which the registration maintenance fee was due. Thereafter, the registrant is prohibited from selling 

or distributing the products except for export in accordance with FIFRA section 17, or for proper 

disposal. Persons other than the registrant may sell distribute, or use existing stocks of products until 

existing stocks are exhausted, provided that such sale, distribution, or use is consistent with the terms of 

the previously approved labeling on, or that accompanied, the canceled products. 

III. REGISTRATION REVIEW CASE CLOSURE 

A cancellation order issued on November 13, 20 15, canceled all N-Butyl Mercaptan product 

registrations in the United States. In view of the cancellation order, the Agency is closing the 

registration review case for N- Butyl Mercaptan pursuant to 40 CFR § 155.42(c) which provides that the 

Agency "will close a registration review case if all products in the case are canceled.'. This document 

concludes theN-Butyl Mercaptan registration review case. 

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