Microbiocide does not contain or release formaldehyde.

Press Release Summary:

AQUCAR(TM) OPP 63 Water Treatment Microbiocide is fast-acting, broad spectrum bactericide and fungicide suited for alkaline pH applications. It can be incorporated with adequate mixing at any point during manufacturing process and high temperature stability allows for addition before cooling of product. It also controls bacterial/fungal growth in aqueous pigments and filter slurries as well as microorganisms in papermaking systems. AQUCAR(TM) OPP 63 also prevents slime formation.

Original Press Release:

Dow Biocides Introduces AQUCAR(TM) OPP 63 Water Treatment Microbiocide; Celebrates Milestone

Buffalo Grove, IL - July 30, 2008

Dow Biocides, a business unit of The Dow Chemical Company, introduces AQUCAR(TM) OPP 63 Water Treatment Microbiocide for use in applications such as slurries preservation and pulp and paper processing. The launch of this product coincides with a Dow Biocides milestone; this year marks the 60th anniversary of the registration of OPP (o-phenylphenol) with the U.S. Environmental Protection Agency (EPA). OPP is the oldest molecule in the broad Dow Biocides portfolio offering.

"Environmentally, not all phenols are the same," said Nanette Hermsen, global marketing manager, Dow Biocides. "While many people perceive phenolic preservatives to have a negative impact on waste water treatment systems, OPP entering the waste water treatment plant at low ppm concentrations will be extensively biodegraded. As the oldest biocide in our portfolio, we have substantial data on OPP and how it functions in applications."

AQUCAR OPP 63 Water Treatment Microbiocide does not contain or release formaldehydeand is a fast-acting, broad spectrum bactericide and fungicide that is highly effective in alkaline pH applications. AQUCAR OPP 63 can be incorporated with adequate mixing at any point during the manufacturing process and its high temperature stability allows for addition before cooling of a product. It is especially effective in controlling bacterial and fungal growth in aqueous pigments and filter slurries as well as controlling microorganisms in papermaking systems and preventing slime formation during virtually all stages of the process.

In 2007, Dow Biocides announced that the EPA determined that the active OPP was eligible for re-registration. As part of the Re-registration Eligibility Decision (RED), the EPA completed human health and environmental risk assessments for OPP. In those assessments, the EPA concluded that there was no evidence of increased risk to infants and children from OPP at typical use concentrations. Furthermore, the EPA classified OPP and SOPP (sodium o-phenylphenol) as "Not likely to be carcinogenic to humans" at typical use concentrations.

"The efforts we took to re-register OPP demonstrate our commitment to process water applications and to finding solutions that are both highly effective, as well as safe for the environment," Hermsen said. "OPP has always been considered an excellent biocide, and now formulators can take full advantage of its broad-spectrum, quick kill properties while working with slurries."

Dow Biocides

Currently offering the industry's largest and most diverse product portfolio, Dow Biocides offers products for many types of microbial challenges and system requirements. The performance capabilities range from high to low pH performance, quick kill to sustained performance and a range of registrations unparalleled in the industry. Need a biocide for a specific application? Ask us how we can help, or visit www.dowbiocides.com

About Dow

With annual sales of $54 billion and 46,000 employees worldwide, Dow is a diversified chemical company that combines the power of science and technology with the " Human Element " to constantly improve what is essential to human progress. The Company delivers a broad range of products and services to customers in around 160 countries, connecting chemistry and innovation with the principles of sustainability to help provide everything from fresh water, food and pharmaceuticals to paints, packaging and personal care products. References to "Dow" or the "Company" mean The Dow Chemical Company and its consolidated subsidiaries unless otherwise expressly noted.

Owing to differing regulatory requirements in other parts of the world, not all products are currently available in all countries. Up to date registration information can be obtained by calling the Dow Customer Information Group in the Pacific: 603-7958-3392 (toll call) 603-7958-5598 (fax); North America: +1 800-309-0988 (toll free) 989-832-1465 (fax); and Europe: 800-3-694-6367 (toll free)* 32-3-450-2240 (toll call) 32-3-450-2815 (fax).


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