CasNr: Tester. 5d NOEC 4 Anabaena flos-aquae. 96h LC Mysidopsis bahia. 28d NOEC Onchorhynchus mykiss 1

Transkript

1 MCPA Fane - Preparat Handelsnavn: Weedex, flere i blanding med andre Herbicid CasNr: 9-7- Tester Test-type Test-varighet µg/l Art Litteratur PNEC PNEC Dafnia kronisk Fisk kronisk 5d EC50 50 Anabaena flos-aquae 5d NOEC Anabaena flos-aquae 9h LC Mysidopsis bahia d NOEC 000 Daphnia magna 9h LC Onchorhynchus 8d NOEC 0000 Onchorhynchus 7d EC50 00 Lemna gibba 7d NOEC 0 Lemna minor Basert på µg/l Usikkerhetsfaktor Verdi (µg/l) AMF basert på PNEC Laveste L(EC) MF basert på PNEC LavesteNOEC 0 0 Vurderingsgrunnlag for usikkerhetsfaktor: PNEC: Kronisk NOEC tre trofiske nivå. Laveste NOEC brukes med UF=0 PNEC: L(E)C50 tilgjengelig fra tre trofiske nivå. Vanplante mest følsom; UF=0 Tidligere MFI Tidligere MFI var basert på alge. 700 Fane - Tester Alle tester Test-type Test-varighet µg/l Art Litteratur Vis Dafnia kronisk Fisk kronisk 5d EC Selenastrum capricornutum 5d EC50 50 Anabaena flos-aquae 9 h EC d NOEC 800 Selenastrum capricornutum 5d NOEC Anabaena flos-aquae 8h EC Daphnia magna 9hLC Penaeus duorarum 9h LC Mysidopsis bahia d NOEC 000 Daphnia magna 9h LC Onchorhynchus 9h LC Onchorhynchus 8d NOEC 0000 Onchorhynchus d EC Lemna gibba d EC50 0,7 Lemna gibba 7d EC50 00 Lemna gibba d NOEC 000 Lemna gibba 7d NOEC 0 Lemna minor Fane - Kommentarer

2 MCPA Lav PNEC for Anabaena flos-aquae i databasen ikke akseptert pga. Unormalt stor forskjell mellom NOEC og EC50 i samme test. Data for andre cyanobakterier støtter ikke denne lave NOEC. Fane - r Litteraturreferanser European Commission Peer Review Programme. MCPA Monograph (draft), 00. Rapporteur Member State: Italy. Pesticide Ecotoxicity Database, 00. Environmental Fate and Effects Division of the Office og Pesticide programs, U.S.EPA, Washington, D.C. European Commission Peer Review Programme. MCPA Addendum vol, 00. Rapporteur Member State: Italy. Pesticide Ecotoxicity Database, 00: Environmentak Fate and Effect Division of office of Pesticide programs, U.S.EPA, Washington, D.C. 5 Biologische Bundesanstalt fur Land- und Forstwirtschaft, 00: BBA-Nr. 7 EPA's Pesticide Ecological Effects Database. Updated 0//05 Fane 5 - Diverse info om preparatet Godkjenelsesdato: Fornyet godkjenning: 00 Trukket (dato): SpesialAnalyse Metode: M5 Bestemmelsesgrense: 0,0 µg/l Dato siste gjennomgang: GC/MS-MULTI Kommentarer

3 Vedlegg for MCPA Kilde: Svensk undersøkelse 00. MCPA MCPA [(-chloro--methylphenoxy) acetic acid] is a selective, systemic herbicide with auxinic mode of action. Intended use for the substance is in cereals, potatoes and pasture. MCPA is under evaluation within the framework of EU Dir. 9/. Cl OCH CO H CH. Physico-chemical properties Physico-chemical properties of MCPA are summarised in table.. Table.: Physico-chemical properties of MCPA. Reference CAS-No Empirical formula C 9 H 9 ClO Molecular weight [g/mol] 00. Solubility in water [mg/kg]. g/l at ph 5 5 C 9 g/l at ph 7 5 C 0 g/l at ph 5 5 C pka.7 Log P ow.70 (0.00 m/l) at ph.80 (0.000 m/l) at ph 0.8 (0.0 m/l) at ph (0.00 m/l) at ph (0.0 m/l) at ph (0.00 m/l) at ph (0.0 m/l) at ph (0.00 m/l) at ph 9 Vapour pressure 0 - Pa at C 0 - Pa at 5 C Henry s law constant Pa m /mol at 5 C. Toxicity to aquatic organisms The toxicity of MCPA to aquatic organisms is summarised in table.. Table.: Aquatic ecotoxicity data of MCPA. Species End-point Exposure duration Result [mg ai/l] Reference Algae

4 Selenastrum Growth 9 h EC50 ) capricornutum inhibition Psedokirchneriella Biomass 7 h EC50 57 ) Aquatic plants Lemna gibba d, static EC ) NOEC Lemna minor Frond numbers 7 d E r C50 >.5 NOEC 0. ) Lemna gibba 7 d E b C50. NOEC 0. Mollusca Crassostrea virginica Crassostrea 8 h, embryo-larval EC 50 7 test, static shell deposition 9 h, flow-through EC 50 8 ) virginica Crustaceans Daphnia magna 8 h, flow-through EC 50 >55 ) Mysidopsis bahia 9 h, flow-through LC 50 0 ) Daphnia magna reproduction d, semi-static NOEC ) Fish 9, static LC 50 95,) 9 h, flow-through LC 50,) 9 h, flow-through LC ) 9 h, static LC h, static LC 50 50,) 9 h LC 50 50,) 9, static LC 50 9 Menidia beryllina 9 h LC 50 80,) Menidia menidia 9 h, static LC d, flow-through NOEC 0,) ) Test performed on preparation (Herbicide Marks M, 95g/l and U -M Fluid, 0g/l). Value expressed as active substance. ) Test performed on salt compound. Value expressed as active substance. ) Test performed on substance with purity <90%. Value expressed as active substance. ) Effect concentration basis for calculation of PNEC. The most sensitive of the tested species was Lemna minor, with a NOEC of 0. mg/l. Since both short and long term studies are available, and three trophic levels have been tested, an assessment factor of 0 is used for calculation of the predicted no effect concentration. Hence, the PNEC for MCPA is calculated to 0.0 mg/l.. Bioaccumulation and persistence

5 MCPA is not expected to bioaccumulate. Photolysis is a potential route of degradation of MCPA in aquatic systems. The substance is stable to hydrolysis at ph between 5 and 9. In a study using ditch water/sediment the time of degradation was - weeks. MCPA is remains mainly in the water phase.. Proposed water quality objective Since PNEC is 0.0 mg/l, the proposed water quality objective for substance is 0.0 mg/l..5 Comments MCPA is mobile in soil and may leach through the soil profile. The metabolite -chloro-- methylphenol is expected to be more toxic to aquatic organisms than the parent substance. This metabolite may be a significant residue of MCPA degradation. A quality objective for the metabolite cannot be established at the moment due to lack of data.. Literature () European Commission Peer Review Programme. MCPA Monograph (draft), 00. Rapporteur Member State: Italy. () Pesticide Ecotoxicity Database, 00, Environmental Fate and Effects Division of Office of Pesticide programs, U.S.EPA, Washington, D.C. () European Commission Peer Review Programme. MCPA Addendum vol, 00. Rapporteur Member State: Italy