Registration Dossier
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EC number: 202-811-7 | CAS number: 100-02-7
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
The biodegradation of 4 -Nitrophenol is described in various publications and has been extensively reviewed by international groups of experts
i.e. BUA report No.75 (1992) and IPCS CICAD (2000). The results showed that the degradation behaviour of 4-Nitrophenol is subject to strong variation depending on the type of the test and the inoculum used. Considering the results it can be concluded that the 4-Nitrophenol is inherently biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- inherently biodegradable
Additional information
i.e. BUA report No.75 (1992) and IPCS CICAD (2000).
Various standardised tests on ready and inherent biodegradability as well as non-standardised tests are available. Different inocula were used (e.g. activated sludge, effluent, discharge from wastewater treatment plants etc.). The results showed that the degradation behaviour of 4 -Nitrophenol is subject to strong variation depending on the type of the test (Andrae et al. 1981, Rott et al. 1982, Scheubel 1984, MITI 1987). While in the MITI test for "ready biodegradability" no degradation was found (MITI 1987), Scheubel (1984) and Ballhorn et al. (1984) reported complete degradation in the semi-continuous activated sludge test (SCAS) for "inherent biodegradability". Also standardized test with 4 -Nitrophenol led to greatly differing results (1 -100 % degradation). A collaborative study by Haltrich (1983) also produced widely differing degrees of degradation, which were probably due to use of different inoculants. However, on the whole, the results show 4 -Nitrophenol to be inherently biodegradable.
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