Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Abiotic degradation:

The atmospheric lifetime of the substance is determined by reaction with OH radicals and is approximately 26 days.

Based on a complete lack of hydrolysable groups, the substance may be expected to be hydrolytically stable. An estimated half-life at 20°C of >1 year may be used for assessment.

Biotic degradation:

The biodegradability of the substance was determined in a screening study in accordance with OECD TG 301D. After the 28 day exposure period, the cumulative percentages biodegradation did not exceed 1%. No further data on the degradation in water, sediments or soil is available. Based on the available data, the substance is characterised as not readily biodegradable.


No bioaccumulation is expected in fish based on the log Kow of 2.2. The BCF in aquatic organisms was estimated using the Veith relationship: log BCF = 0.85·log Kow - 0.70 (applicable for substances with log Kow ≤6). This results in an estimated BCF for fish of 14.8 L/kg w.w.

Transport and distribution:

The substance can be expected to have a low potential for adsorption based on the log Kow of 2.2. The organic carbon-water partitioning coefficient (Koc) was calculated from the log Kow using the non-hydrophobics QSAR in EUSES: log Koc = 0.52·logKow + 1.02). The calculated Koc value is 146 L/kg (log Koc = 2.16). This predicted value is used in the assessment.

The Henry's law constant is calculated in EUSES using the substance's molecular weight of 130.5 g/mol, the experimentally determined vapour pressure of 1065 hPa (at 19.93°C) and the water solubility of 1900 mg/L (at 20°C). The Henry's law constant at environmental temperature (12 °C) is calculated to be 4.64E+03 Pa·m³/mol. Based on this value, the substance is expected to volatilise rapidly from water.