Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Hydrolysis:

Based on existing data the substance is conisdered to be stable in water, a relevant hydrlosis was not observed.

Biodegradation in water: A relevant biodegradation was measured (32 % after 28 d), the substance is classified as "inherently biodegradable".
According to ECHA documentGuidance on information requirements and chemical safety assessment

, chapter R.16, a half-life of 150 d in surface water and of 150 d in marine water ist stated as default value.

Biodegradation in soil: The degradation of N-[(3(5)-Methyl-1H-pyrazol-1-yl)methyl]acetamide (P 70/05) was investigated under aerobic conditions at 20 °C. Three German soils of different characteristics were used for the experiment (LUFA 2.1 - silty sand/sand, LUFA 2.2 - loamy sand and LUFA 2.3 - silty sand/sandy loam). The formation of 3-Methylpyrazole, a possible degradate of P 70/05, was monitored.

N-[(3(5)-Methyl-1H-pyrazol-1-yl)methyl]acetamide (P 70/05) degraded fastly in the soil test systems.

The DT-50 values of P 70/05 in the soils LUFA 2.1, LUFA 2.2 and LUFA 2.3 soil were 2.31, 0.70 and 1.05 days.

The DT-90 values of P 70/05 in the soils LUFA 2.1, LUFA 2.2 and LUFA 2.3 soil were 7.68, 2.32 and 3.31 days.

Within the course of the P 70/05 degradation, the original isomers ratio of P 70/05 changed.

The formation of 3-Methylpyrazole reached a maximum of 0.1331 mg/kg on day-3 in soil LUFA 2.3. On day-29 the analysed value for 3-Methylparazole accounted for 0.0158 and 0.0193 mg/kg in soil LUFA 2.3.

Additional information

Based on existing data the substance is conisdered to be stable in water, a relevant hydrlosis was not observed. A relevant biodegradation was measured (32 % after 28 d), the substance is classified as "inherently biodegradable".
According to ECHA document Guidance on information requirements and chemical safety assessment

, chapter R.16, a half-life of 150 d in surface water and of 150 d in marine water ist stated as default value.