Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Peracetic acid decomposes rapidly in all environmental compartments i.e. air, activated sludge, surface water and soil.

The following processes are involved in the abiotic decomposition/degradation of peracetic acid in the environment:

- Hydrolysis

- Spontaneous decomposition

- Metal (Fe, Cr, Mn) catalysed decomposition

- Oxidation of organic substance

The half-lives of peracetic acid (transferred to 12°C using the Arrhenius equation) that can be used as input parameter for "degradation" in the exposure assessment are as follows:

- Surface water:

DT50 of PAA measured: 31.7 hours (20°C); DT50(12°C): 85.6 hours (Reference: IUCLID section 5.1.2 / CSR section 4.1.1.1: Gamet et al. (2000); Klein and Goossens (2007))

- Soil:

DT50 of PAA measured: 1 min (*); DT50 (12°C): 2.7 min (Reference: IUCLID section 5.2.3 / CSR section 4.1.2.2: Howarth (2003))

- Air:

DT50 of PAA measured: 22 min (*); DT50 (12°C): 59.4 min (Reference: IUCLID section 5.1.1 / CSR section 4.1.1.2.1: Ancker and Zetterberg (1997))

- STP - aeration tank:

DT50 of PAA measured: 3 min (20°C); DT50 (12°C): 5.6 min (Reference: IUCLID section 5.2.1 / CSR section 4.1.2.1.2: De Groot (2001))

- STP - effluent stream (covering also the sewer system):

DT50 of PAA measured: 5 min (20°C); DT50 (12°C): 9.3 min (Reference: IUCLID section 5.2.2 / CSR section 4.1.2.1.3: Van Egdom (2007))

(*) No temperature was indicated in the reports; a temperature of 25°C was assumed as worst case