Miljöpåverkan
Difelikefalin
Miljörisk:
Risk för miljöpåverkan av difelikefalin kan inte uteslutas då ekotoxikologiska data saknas.
Nedbrytning:
Det kan inte uteslutas att difelikefalin är persistent, då data saknas.
Bioackumulering:
Difelikefalin har låg potential att bioackumuleras.
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Detaljerad miljöinformation
Environmental Risk Classification
Predicted Environmental Concentration (PEC)
PEC is calculated according to the following formula:
PEC (μg/L) = (A*109*(100-R))/(365*P*V*D*100) = 1.37*10-6*A(100-R)
PEC = 0,0000000274 μg/L
Where:
A = 0,0002 kg (total sold amount API in Sweden year 2023, data from IQVIA).
R = 0 % removal rate (due to loss by adsorption to sludge particles, by volatilization, hydrolysis or biodegradation) = 0 if no data is available.
P = number of inhabitants in Sweden = 10 *106
V (L/day) = volume of wastewater per capita and day = 200 (ECHA default) (Ref I)
D = factor for dilution of waste water by surface water flow = 10 (ECHA default) (Ref I)
According to the European Medicines Agency guideline on environmental risk assessment of medicinal products (EMA/CHMP/SWP/4447/00), use of difelikefalin is unlikely to represent a risk for the environment, because the predicted environmental concentration (PEC) at the time of registration was below the action limit 0.01 μg/L.
Bioaccumulation
Log Dow (pH 7.4) = -1.99 (Ref II). Method unknown.
Since log Dow < 4 at pH 7, the substance has low potential for bioaccumulation.
References:
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ECHA, European Chemicals Agency. 2008 Guidance on information requirements and chemical safety assessment. http://guidance.echa.europa.eu/docs/guidance_document/information_requirements_en.htm
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https://www.chemspider.com/Chemical-Structure.44208824.html