Registration Dossier

Diss Factsheets

Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

Currently viewing:

Administrative data

Link to relevant study record(s)

Referenceopen allclose all

Endpoint:
biodegradation in water: sediment simulation testing
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:
Transformation products:
yes
No.:
#1
No.:
#2
No.:
#3
No.:
#4
No.:
#5
No.:
#6
Details on transformation products:
Degradation of the registration substance is expected to be principally via abiotic transformation under aqueous conditions (such as in a degradation simulation study). Therefore, the transformation products expected in the environment are those identified in the abiotic degradation study (reported in Section 5.1.2 of the IUCLID). Environmental hazard assessment is based on the properties of the hydrolysis products
Endpoint:
biodegradation in water: simulation testing on ultimate degradation in surface water
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:
Transformation products:
yes
No.:
#1
No.:
#2
No.:
#3
No.:
#4
No.:
#5
No.:
#6
Details on transformation products:
Degradation of the registration substance is expected to be principally via abiotic transformation under aqueous conditions (such as in a degradation simulation study). Therefore, the transformation products expected in the environment are those identified in the abiotic degradation study (reported in Section 5.1.2 of the IUCLID). Environmental hazard assessment is based on the properties of the hydrolysis products

Description of key information

Key value for chemical safety assessment

Additional information

Testing is waived on the basis that the chemical safety assessment according to Annex I indicates that it is not necessary to conduct the simulation test on ultimate degradation in surface water and the sediment simulation test, or to identify degradation products.

 

Simulation tests (water and sediments) are not considered necessary because:

· The constituents of the submission substance are expected to hydrolyse moderately to rapidly and the corresponding silanol hydrolysis products have low log Kow values and, therefore, exposure of the sediment compartment is expected to be low.  

· The risk characterisation ratios (RCRs) for the aquatic and sediment compartments, based on the assumption that the constituents and silanol hydrolysis products are not biodegradable, are <1.  

· The non-silanol hydrolysis products, methanol and ethanol are readily biodegradable.