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Miljöpåverkan (Läs mer om miljöpåverkan)

Mometason

Miljörisk: Användning av mometason har bedömts medföra låg risk för miljöpåverkan.
Nedbrytning: Mometason bryts ned långsamt i miljön.
Bioackumulering: Mometason 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) = 1.5*10-6*A(100-R)


PEC = 0.0058 μg/L


Where:

A = 38.9 kg (total sold amount API in Sweden year 2015, data from IMS Health).

R = 0 % removal rate (worst case assumption)

P = number of inhabitants in Sweden = 9 *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)


Predicted No Effect Concentration (PNEC)


Ecotoxicological studies


Crustacean, water flea (Daphnia magna) (OECD 202) (Ref. II):

Acute toxicity

EC50 48 h (immobilization) > 5 mg/L

No toxicity up to limit of solubility


Crustacean mysid (Americamysis bahia) (EPA 850.1035 (Ref. III):

Acute toxicity

EC50 48 h (mortality) > 5 mg/L

Not toxicity up to limit of solubility


Fish, inland silverside (Menidia beryllina) (EPA 1004.0) (Ref. IV):

Acute toxicity
LC50 96h (mortality) > 0.11 mg/L

No toxicity up to limit solubility


Green Algae (Selenastrum capricornutum) (OECD 201) (Ref. V):

EC50 72h (yield and growth rate) > 3.2 mg/L

NOEC 8d (yield and growth rate) = 3.2 mg/L

No toxicity up to limit of solubility


Fish, sheepshead minnow (Cyprinodon variegatus) (EPA 1004.0) (Ref. VI):

Sub-chronic toxicity

LC50 7d (mortality and growth) > 5 mg/L

No toxicity up to limit of solubility


Crustacean, water flea (Daphnia magna) (OECD 211) (Ref. VII):

Chronic toxicity

NOEC 21d (immobilization, reproduction, growth) = 0.34 mg/L

LOEC 21d (immobilization, reproduction, growth) > 0.34 mg/L

No toxicity up to limit of solubility


Fish, fathead minnow (Pimephales promelas) (OECD 210) (Ref. VIII):

Chronic toxicity

NOEC 32d (total length and dry weight) = 0.14 µg/L

LOEC 32d (total length and dry weight) = 0.22 µg/L


PNEC = 0.014 µg/L (0.14 µg/L / 10 based on the most sensitive chronic NOEC for the fish and an assessment factor (AF) of 10)


Environmental risk classification (PEC/PNEC ratio)

PEC/PNEC = 0.0058/0.014 = 0.42, i.e. PEC/PNEC ≤ 1 which justifies the phrase "Use of mometasone furoate has been considered to result in low environmental risk.”


Biotic degradation

Biodegradation in Sludge (OECD 314) (Ref. IX):

Primary degradation half-life = 28 days
Ultimate biodegradation (to CO2) < 5 % in 28 days


Sediment Transformation (OECD 308) (Ref. X):

DT50 (total system) = 81 to 105 days


At each sampling interval, the sediment samples from each test system were separated into water and sediment fractions. Acetonitrile was added to the water phase at 30 mL of acetonitrile per 150 mL aqueous volume in order to provide an organic content of approximately 20%. The sediment was then extracted once each with acetonitrile, then 0.1% hydrochloric acid in acetonitrile, and finally with acetonitrile:purified reagent water:hydrochloric acid 80:20:0.1, (v:v:v). The water and sediment extracts were radioassayed by LSC and then analyzed by HPLC/RAM to quantify [14C]mometasone and degradation products in the fractions. Radioactivity in the post extracted solids (sediment bound) was quantified by combustion analysis and the liquid volatile organic traps were radioassayed by LSC.


Evidence of primary degradation was observed in the aerobic water/sediment test samples. One major peak (>10% AR) was detected in some of the chromatograms for the Taunton River and Weweantic River aerobic test samples as a shoulder of the parent peak at a retention time of 17-minutes. Several minor regions of radioactivity were observed in some of the chromatograms for the Taunton River and Weweantic River test samples (including a peak with an 18-minute retention time). In all cases, these peaks represented less than 10% of the applied radioactivity and were not considered further. Average material balance ranged from 92.0 to 97.2% AR throughout the 100-day study.


Ultimate biodegradation was observed in the aerobic test systems. The cumulative amount of evolved 14CO2 was 3.0% AR for the Taunton River aerobic test systems and 2.6% AR for the Weweantic River aerobic test systems at Day 100. No radioactivity was detected as volatile organic in the aerobic test systems accumulatively at

Day 100.


The half-lives of mometasone in the water fraction ranged from 3.7 to 4.2 days in the aerobic test systems. The half-lives in the total water/sediment test systems ranged from 81 to 105 days for the aerobic test systems.


Abiotic degradation

Hydrolysis (OECD 111) (Ref. XI):

Half-Life ():

pH 4 = 64 days

pH 7 = 12 days

pH 9 = 241 min


Justification of chosen degradation phrase:

Mometasone furoate has a DT50 for the total system of ≤120 days. Thus, the phrase “Mometasone furoate is slowly degraded in the environment” is chosen. 


Bioaccumulation

Partitioning coefficient (OECD 107) (Ref. XII):

Log Kow:

pH 5 = 4.66

pH 7 = 4.68

pH 9 = 4.81


Bioaccumulation (OECD 305) (Ref. VXI):

Flow through study with Bluegill sunfish (Lepomis macrochirus)

BCFwhole body, total residues = 104.9 to 107.1


Justification of chosen bioaccumulation phrase:

Since BCF < 500, mometasone furoate has low potential for bioaccumulation.


References

I. 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


II. Smithers Viscient 2010. "Mometasone Furoate - Acute Toxicity to Daphnids, (Daphnia magna) Under Static Conditions," Study No., 359.6387, SSL, Wareham, MA, USA 1 December 2010.


III. Smithers Viscient, 2010. "Mometasone Furoate – Acute Toxicity to Mysids, Americamysis bahia, Under Static Conditions," Study No., 359.6388, SSL, Wareham, MA, USA, 16 December 2010.


IV. Smithers Viscient, 2013. "Mometasone – Acute Toxicity to Inland Silverside (Menidia beryllina) Under Static Conditions," Study No. 359.6671, SV, Wareham, MA, 12 March 2013.


V. Smithers Viscient 2011. " Mometasone Furoate - 72-Hour Acute Toxicity Test with Freshwater Green Alga, Pseudokirchneriella subcapitata, Following OECD Guideline 201," Study No., 359.6438, SV, Wareham, MA, USA 25 May 2011.


VI. Smithers Viscient, 2012. "Mometasone Furoate – Short-Term Toxicity to Sheepshead Minnow (Cyprinodon variegatus) Under Static-Renewal Conditions," Study No. 359.6596, SV, Wareham, MA, 27 March 2012.


VII. Smithers Viscient, 2012. "Mometasone Furoate - Full Life-Cycle Toxicity Test with Water Fleas, (Daphnia magna), Under Flow-Through Conditions Following OECD Guideline #211," Study No. 359.6439, SV, Wareham, MA, 1 May 2012.


VIII. Smithers Viscient, 2012. "Mometasone Furoate - Full Life-Cycle Toxicity Test with Water Fleas, (Daphnia magna), Under Flow-Through Conditions Following OECD Guideline #211," Study No. 359.6439, SV, Wareham, MA, 1 May 2012.


IX. Smithers Viscient, 2011. "[14C]Mometasone - Determination of the Biodegradability of a Test Substance in Activated Sludge Based on OECD Method 314B," Study No. 359.6446, SV, Wareham, MA, 01 September 2011.


X. Smithers Viscient, 2011. "[14C]Mometasone - Aerobic Transformation in Aquatic Sediment Systems Following OECD Guideline 308," Study No. 359.6445, SV, Wareham, MA, 06 September 2011.


XI. Smithers Viscient, 2011. "Mometasone Furoate – Determination of the Water Solubility of a Test Substance Following OECD Guideline 105," Study No. 359.6436, SV, Wareham, MA, 29 June 2011.


XII. Smithers Viscient, 2011. "Mometasone Furoate – Determining the Partition Coefficient (n-Octanol/Water) by the Flask-Shaking Method Following OECD Guideline 107," Study No., 359.6385, SV, Wareham, MA, USA, 10 March 2011.


XIII. Smithers Viscient, 2012. "[14C]Mometasone - Flow-Through Bioconcentration and Metabolism Study with Bluegill Sunfish (Lepomis macrochirus) Following OECD Guideline 305," Study No. 359.6497, SV, Wareham, MA, 21 May 2012.

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