Registration Dossier
Registration Dossier
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EC number: 202-811-7 | CAS number: 100-02-7
Endpoint summary
Administrative data
Description of key information
Additional information
Extensive reviews and study citations on the environmental behaviour of 4 -Nitrophenol have been published (BUA report No.75 1992, IPCS CICAD 2000, ECB IUCLID 2000):
Soil sorption coefficients (Koc) were found to increase with increasing organic carbon content. Measured Koc values ranged from 56 to 530 (Boyed 1982, Broecker et al. 1984, Koerdel et al. 1984, Lokke 1984, Marquart et al. 1984; all cited from the IPCS CICAD 2000). Nitrophenols emitted to soil are expected to be biodecomposed under aerobic conditions. Infiltration into groundwater is expected only under conditions unfavourable for biodegradation (e.g. anaerobic conditions). From the available experimental results, nitrophenols have to be classified as substances with a low to moderate potential for soil sorption (IPCS CICAD 2000).
4 -Nitrophenol is extensively adsorbed to particles. Therefore, elevated levels of this isomer are detected in the gaseous phase of clouds (Luettke et al. 1997, cited from the IPCS CICAD 2000). Based on its vapour pressure and Henry´s Law constant, significant volatilization from soil or water is not expected. Since nitrophenols dissociate in aqueous solutions, volatilization may further decrease with increasing pH in surface water. This leads to the conclusion that dry and wet deposition of nitrophenols from air to surface waters and soil are to be expected (IPCS CICAD 2000).
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