Silafluofen
CAS No. 105024-66-6

 
 

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Adverse Effects
Abstracts

ACTIVITY: Insecticide, Termiticide, Wood preservative (pyrethroid)

CAS Name: (4-ethoxyphenyl)[3-(4-fluoro-3-phenoxyphenyl)propyl]dimethylsilane

Structure:

Adverse Effects

- Very little tox data available.

Tumor Promotor

Environmental:

Canada: Classified as a "severe marine pollutant"

Regulatory Information
(only comprehensive for the US)
US EPA Registered: No
Registered use in
(includes only a limited list of countries)

India, Japan, Vietnam  
Japan's Maximum Residue Levels (MRLs)

Apple, Pear, Japanese pear, Japanese persimon, Rice, Tea

-- Note the very high levels - 35 ppm - for Tea (Green, Black, Oolong, Wulung) 

Other Information
Molecular Formula: C25H29 F O2Si 
Entry Year: 1994 
Manufacturers:

Hoechst
Aventis
Dainihon Jochugiku
 

Other Names: Mr. Joker
Silonen
Silatop
Hoe 084498
HOE 498
 
Of special interest:
PAN Data  
Abstracts
Australia - 2002: There are chemicals under consideration (or reconsideration) or being evaluated for use as termiticides in Australia that are currently used with varying success in other countries. One of the more interest ing variations is Silafluofen (C25H29FO2Si), an insecticide (pyrethroid ether) containing silicon, used in Japan for soil and timber treatments against termites and other pests since 1991. It has become popular because it has low toxicity to fish and mammals, and it is highly stable chemically (Nakayama et al., 2001). Antitermitic plastic sheeting and antitermitic heat insulators have been developed by impregnating silafluofen into plastic film and polystyrene foam.
Ref: November 2002. Environmental effects of currently used termiticides under Australian conditions. National Research Center for Environmental Toxicology.

http://www.build.qld.gov.au/research/BrDocs/termiticides/termiticides_report.PDF 
Bayer - 2002: The merger with Aventis CropScience Shionogi K.K. added many market-leading products to the product portfolio, including Basta SL, a popular non-selective contact herbicide; MR. Joker, an insecticide with a unique spectrum of activity; and Rovral, a standard fungicide for use in horticulture and orchards.
Ref: Bayer 2002 Management Report

http://www.bayer.co.jp/bgj/english/bayerinjapan/report.html  
Hoechst - 1995: A newly launched product was the insecticide MR. Joker (active ingredient: silafluofen) for use particularly in rice growing but also in tea and fruit cultivation.
Ref: Hoechst Annual Report 1995
http://www.archive.hoechst.com/dl/pdf/geschaeftsbericht_hoechst_95e2.pdf
 
2001 - New applications of silafluofen to termite control - Koji Nakayama et al. Paper presented at the International Research Group on Wood Preservation in Nara, Japan (May 2001). 
October 2001 - Glossary of Pesticide Chemicals - A listing of pesticides subject to analysis of residues in foods and feeds by the US Food and Drug Administration.
June 21, 2001 - Hazardous Materials Regulations for Fluoride/fluorinated substances, Federal Register on Harmonization of international shipment of Dangerous Goods. Final Rule.  

June 14, 2001 - Implementation of the Community Strategy for Endocrine Disruptors - a range of substances suspected of interfering with the hormone systems of humans and wildlife. Communication from the Commission to the Council and the European Parliament. Commission of the European Communities, Brussels COM (2001) 262 final. This document presents a "priority list of substances for further evaluation of their role in endocrine disruption. During 2000, a candidate list of 553 man-made substances and 9 synthetic/natural hormones has been identified." Categories included on the Endocrine Disruptor List

Synthetic pyrethroids While only the broad category "Synthetic pyrethroids" was included in the Commission's list, it might be of some interest to note that the following organofluorine pesticides are "Synthetic pyrethroids:" Acrinathrin, Bifenthrin, beta-Cyfluthrin, Cyhalothrin, gamma-Cyhalothrin, lambda-Cyhalothrin, Fenfluthrin, Flucythrinate, Flufenprox, Flumethrin, Fluvalinate, tau-Fluvalinate, Halfenprox, Protrifenbute, Silafluofen, Tefluthrin, Transfluthrin
 
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