DCOIT, an Active Substance of Dow Microbial Control, recommended by the EU Competent Authority for approval and inclusion in BPD Annex I listing under PT 21: Antifouling Products

Horgen, Switzerland - April 01, 2011

Dow Microbial Control, a business group of The Dow Chemical Company (Dow), announced today that after 5 years of evaluation following the most stringent and demanding risk assessment methodology, its active substance DCOIT (4,5-Dichloro-2-octyl-2H-isothiazol-3-one) has been recommended by the EU competent authority for approval and inclusion into the Annex I of the Biocidal Products Directive for Product Type 21: antifouling products.

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

Last December, the Rapporteur Member State completed the Risk Assessment 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 I 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 I inclusion is issued reinforces our confidence in the safety of SEA-NINETM antifouling agent” said Lynette Santiago, Global Marketing Manager, Marine Antifouling for Dow Microbial Control.

DCOIT has been used safely around the world as an active substance in antifouling products under the trade mark SEA-NINETM since the early 1990s.

SEA-NINETM 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.


DCOIT (4,5-Dichloro-2-octyl-2H-isothiazol-3-one), sold under the trade mark SEA-NINETM is used as a broad spectrum biocide in antifouling paints 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%), as a co-biocide with another biocidal active substance such as copper oxide.

About Dow Microbial Control

Dow Microbial Control innovates with science and technology to provide long-term viable and sustainable microbial control. Our comprehensive global offering provides customers with solutions to optimize formulations, including high performing and technically supported selection of registered actives and products. With world-class people organization-wide and a broad portfolio of microbial control technologies, Dow Microbial Control can help solve most microbial control problems. From specialty to highly regulated and non-regulated, the company has the experience and essentials for more sustainable microbial protection for products and processes. Visit us at

About Dow

Dow combines the power of science and technology with the “Human Element” to passionately innovate what is essential to human progress. The Company connects chemistry and innovation with the principles of sustainability to help address many of the world's most challenging problems such as the need for clean water, renewable energy generation and conservation, and increasing agricultural productivity. Dow's diversified industry-leading portfolio of specialty chemical, advanced materials, agrosciences and plastics businesses delivers a broad range of technology-based products and solutions to customers in approximately 160 countries and in high growth sectors such as electronics, water, energy, coatings and agriculture. In 2010, Dow had annual sales of $53.7 billion and employed approximately 50,000 people worldwide. The Company's more than 5,000 products are manufactured at 188 sites in 35 countries across the globe. References to "Dow" or the "Company" mean The Dow Chemical Company and its consolidated subsidiaries unless otherwise expressly noted. More information about Dow can be found at

For Editorial Information:

Nathalie Knabe
The Dow Chemical Company
+41 44 728 26 65

Roysten D'mello
Dow India
+91 9833859074