Registration Dossier
Registration Dossier
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EC number: 200-839-4 | CAS number: 75-10-5
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
Based on its physico-chemical properties and according to the distribution modeling, when released to the environment the majority of difluoromethane will partition into the air compartment (99.99%). Moreover difluoromethane is neither expected to sorb significantly to soil and sediment. nor to bioaccumulate in aquatic species due to its low potential for adsorption and bioaccumulation based on a measured log Kow of 0.21. So, Difluoromethane, when released to the environment, will enter almost exclusively into the ambient air; it has little tendency to partition to water, biota or soil. Because of its moderate sorption affinity, difluoromethane is expected to be mobile in soil and to not sorb on sediments.
As a conclusion, sediment toxicity is not expected as the substance is a gas and and has a low potential for adsorption (log Kow 0.21); it is expected that direct and indirect exposure of the sediment compartment is therefore unlikely.
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