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Environmental fate & pathways

Phototransformation in air

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Description of key information

After evaporation or exposure to air, the substance will be slowly degraded by photochemical processes.

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Additional information

There are no experimental data on photodegradation in air of sodium acrylate. Since sodium acrylate is a salt, Q(SAR) calculation on the phototransformation would not be reliable. Therefore, the calculation of photodegradation in air is based on the structural analogue acrylic acid. The calculation using SRC AOP v1.92 showed that acrylic acid will be slowly degraded by photochemical processes after exposure to the air reacting with the photochemically produced hydroxyl radicals (calculated half-life = 39.59 hours). In addition, since sodium acrylate shows a very low vapour pressure (0.000000515 at 25 °C), a significant evaporation is unlikely. Consequently, photodegradation of sodium acrylate under environmental conditions is not of major concern.