Registration Dossier
Registration Dossier
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EC number: 221-717-7 | CAS number: 3209-22-1
Endpoint summary
Administrative data
Description of key information
Phototransformation in water
Although 1,2-dichloro-3-nitrobenzene absorbs in the range of wavelength > 290 nm, no reacting of a aqeous solution at irradiation is observed. But in presence of titanium dioxide a rapid photo mineralisation is detected. The tests were conducted concentrations of 7.68 mg/l 1,2-dichloro-3-nitrobenzene and 500 mg/l titanium dioxide (disperse) were used. After 35 minutes 50 % of 1,2-dichloro-3-nitrobenzene were decomposed. After 3 hours 1,2-dichloro-3-nitrobenzene was not yet complete degraded. Primary reaction products are dichloronitrobenzene (mainly 1,2-dichloro-3,5dinitrobenzene) and dichloronitrophenole.
The photocatalytical reaction with titanium dioxide is also possible at sunlight but with lower reaction rate. (Hustert et al., 1987). Indications of photocatalytical degradation were obtain by Kondo et al (1982). A concentration decay of 3.8 % was detected after 5 day storage at pH 7 and 20+/- 5 °C in darkness; in daylight the concentration decay was 7.6%. The interpretation of the values is critical because for the preparation of the solutions acetone was used. Acetone may act as a sensitizer.
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