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Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Abiotic degradation

N-[3-(Dimethoxymethylsilyl)propyl]ethylenediamine hydrolyses very rapidly (half-life 15 min at 20-25°C and pH 7, see Section 4.1.1.1).

A half-life of 0.1 days for reaction with hydroxyl radicals in air has been calculated for N-[3-(dimethoxymethylsilyl)propyl]ethylenediamine.

The hydrolysis products are N-[3-(dihydroxymethylsilyl)propyl]ethylenediamine and methanol. A half-life of 0.5 days for reaction with hydroxyl radicals in air has been calculated for N-[3-(dihydroxymethylsilyl)propyl]ethylenediamine.

Biotic degradation

39% biodegradation in 28 days has been attained for a structurally-related substance. This biodegradation is due to the biodegradation of the methanol hydrolysis product. No biodegradation is expected for the silanol hydrolysis product, N-[3-(dihydroxymethylsilyl)propyl]ethylenediamine.

The chemical safety assessment indicates that it is not necessary to obtain further information on biodegradation via simulation tests in water, sediment or soil.

Table. Degradation rates

Degradation rate in water:

Hydrolysis half-life: 15 minutes at pH 7 and 20-25°C (measured), for removal of parent. No significant biodegradation of silanol hydrolysis product expected.

Degradation rate in sediment:

No significant biodegradation of silanol hydrolysis product expected.

Degradation rate in soil:

No significant biodegradation of silanol hydrolysis product expected.

Degradation rate in air:

Half-life for reaction with hydroxyl radicals in air: 0.1 days for parent; 0.5 days for silanol hydrolysis product (predicted).

Additional information