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DCOIT (4,5-Dichloro-2-octyl-2H-isothiazol-3-one) recommended by EU Competent Authorities for approval for anti-fouling products

Dow Microbial Control : 06 April, 2011  (New Product)
After five years of evaluation and following stringent and demanding risk assessment methodology, Dow Microbial Controls' active substance DCOIT has been recommended for approval and inclusion into Annex I of the Biocidal Products Directive for Product Type 21 antifouling products.
DCOIT (4,5-Dichloro-2-octyl-2H-isothiazol-3-one), sold under the trade mark SEA-NINE is used as a broad spectrum biocide in anti-fouling paints (Product type 21) to control the growth and settlement of fouling organisms on commercial boats and superyachts (size > 25 meters), and on buoys, sluice doors and off-shore structures submerged in marine and brackish/estuarine water. DCOIT is used at 1-3% in the antifouling paint (typical concentration 2%), or as adapted to the required application, as a co-biocide with another biocidal active substance such as copper oxide.

In the European Union, the active substance DCOIT has been supported by Dow Microbial Control under the Biocidal Products Directive 98/8/EC and in 2002, Dow Microbial Control notified DCOIT in Product Type 21: antifouling products. By February 2006, Dow Microbial Control submitted a complete dossier for the evaluation of DCOIT in PT21 to the designated Rapporteur Member State: Norway.

Last December, the Rapporteur Member State completed the Risk Assessment on the use of DCOIT as an active substance for antifouling products and issued a draft Assessment Report (also called BPD draft Competent Authority Report). This report recommends the approval of the active substance and its inclusion in the Annex 1 of the Biocidal Products Directive. A summary version is now available on the external website of the European Commission.

The next steps of the evaluation will be the peer review of the draft “Competent Authority Report” by the other EU Member States during Technical meetings and Competent Authority meetings, which will take place in 2011 and 2012.

“The fact that DCOIT is the first existing active substance used in Product Type 21 for which a positive recommendation for Annex 1 inclusion is issued reinforces our confidence in the safety of the SEA-NINETM antifouling agent” said Lynette Santiago, Global Marketing Manager, Marine Antifouling at Dow Microbial Control.

The active substance DCOIT (4,5-Dichloro-2-octyl-2H-isothiazol-3-one) has been sold around the world as an active substance in antifouling products under the trade mark SEA-NINE since the early 1990s.

In 1996, SEA-NINE 211 won the prestigious Presidential Green Chemistry Challenge Award in the category of Designing Safer Chemical Products. This award was established by an alliance of the chemical industry, the EPA and the Clinton Administration to recognize and promote fundamental breakthroughs in chemistry that prevent pollution and have broad applicability in industry.
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