Registration Dossier
Registration Dossier
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EC number: 229-633-2 | CAS number: 6635-20-7
Endpoint summary
Administrative data
Description of key information
Additional information
Phototransformation in air
The atmospheric oxidation half life of 5-nitrovanillin was estimated using level III multimedia model. It indicates that 5-nitrovanillin is not persistent in air medium as the half life period of 5-nitrovanillin in air is only 0.88 days. From this it is concluded that 5-nitrovanillin is rapidly phototransformed in air.
Hydrolysis
Hydrolysis Rate Constant of 5-nitrovanillin was estimated to be 18.5037 E-12 cm3/molecule-sec at haif life of 0.578 Days. This indicates that 5-nitrovanillin is poorly hydrolysable.
Biodegradation in water
5-nitrovanillin was estimated to be 50% biodegradable in water in 38 days (half-life) indicating that 5-nitrovanillin is readily biodegradable in water since the half life is less than the threshold of 60 days (to qualify the chemical as persistent)
Biodegradation in water and sediment
Half life period of 5-nitrovanillin in water was observed to be 38 days while in sediment it is 340 days.Based on these half life values it is concluded that 5-nitrovanillin is readily biodegradable in water where as it is non biodegradable in sediment. However, since there is no diffusion of the substance in the sediment as evident from the reported data (0% in sediment) and hence persistence in the sediment compartment is not likely to be critical.
Biodegradation in soil
Half life period of 5-nitrovanillin in soil was observed to be 75 days (1800 hrs ). Based on these half life values it is concluded that 5-nitrovanillin is not readily biodegradable (persistent) in soil since the half life period of 5-nitrovanillin exceeds the EPA criteria of 60 days (to qualify the chemical as persistent)
Bioaccumulation
From the estimated data of the key study as well as the supporting study, the bio-concentration factor (BCF) is found to be in the range of 3.88 to 4.2. This BCF range does not exceed the bioconcentration criteria of 1000. From this it is concluded that 5-nitrovanillin is not expected to bioaccumulate in the food chain
Adsorption/desorption
Soil Adsorption Coefficient i.e Koc value of 5-nitrovanillin was estimated to be in the range Koc 14.75 {Log Koc (1.1687) to Koc 45.289 (Log Koc 1.656). This indicates that 5-nitrovanillin is expected to have poor adsorption to the organic carbon fraction of the soil and rapid migration potential to groundwater in soil.
Henry's Law constant
Henry's Law Constant of 5-nitrovanillin was estimated as 0.000105 Pa m3/mole at 25°C by Bond contribution method.
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