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Environmental fate & pathways

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The following section is copied from the OECD SIDS document on sodium percarbonate (OECD 2006), section 2.2.5:

"When sodium percarbonate is dissolved in water, it dissociates to sodium carbonate and hydrogen peroxide. Sodium and carbonate can not be biodegraded, although carbonate can be neutralised to bicarbonate (see section 2.2.3).

Standard ready biodegradation tests are not applicable to the inorganic substances like hydrogen peroxide (European Commission, 2003b). However, the data set available was regarded as sufficient to draw conclusions upon the degradation of hydrogen peroxide. Enzymes produced by aerobic bacteria convert hydrogen peroxide to water and oxygen. Furthermore hydrogen peroxide is rapidly degraded in a biological waste water treatment plant (Groeneveld et al., 1999). Not only a biological waste water treatment plant but also other domestic clarifiers are able to degrade hydrogen peroxide (Guhl et al., 2001)."