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Environmental fate & pathways

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The maximum estimated dissipation half-life time for components of DVB-55, -65, and -HP is 6.3 hours, which represents that for reaction with both hydroxyl radical and ozone in the troposphere. While the substance may absorb sunlight at wavelengths > 290 nm, there exists no experimental evidence to suggest that direct photolysis in air, water, or soil is an important fate process for the components of this substance. Divinylbenzene is stable at 25° and 49-51°C and at pH 4, 7 and 9 in water over 5 days, indicating that hydrolysis is not an important process affecting the fate of this substance/components in the aquatic environment. Biodegradation is expected to be the most important process affecting fate/lifetime of the DVB substance components in water, soil, and sediment. Although the biodegradation screening tests indicate little or no biodegradation of these substances, their analogy to other biodegradable alky-substituted aromatics (e.g., styrene, ethylbenzene, toluene, xylenes) whose metabolic pathways are well-known and documented, indicates that the components of the DVB substance will be ultimately biodegradable in the environment.