Tribenuron-metyl Fane - Preparat Handelsnavn: Express Herbicid Tester Casr: 000-48-0 Test-type Test-varighet µg/l Art Litteratur PEC PEC Alger kronisk Dafnia akutt Fisk akutt Fisk kronisk Vannplanter akutt Vannplanter kronisk 0hEC50 0,8 3 7h OEC 50 4 96h EC50 70000 Daphnia magna d OEC 0000 Daphnia magna 96h LC50 738000 Onchorhynchus mykiss d OEC 560000 Onchorhynchus mykiss 4d EC50 4,3 Lemna gibba 4d OEC Lemna gibba Basert på µg/l Usikkerhetsfaktor Verdi (µg/l) AMF basert på PEC Laveste L(EC)50 4,3 0 0,43 MF basert på PEC LavesteOEC 0 0, Vurderingsgrunnlag for usikkerhetsfaktor: PEC: OEC tre trofiske nivå. For alger er imidletid laveste OEC i databasen høyere enn laveste EC50. Imidlertid er vannplanter mer følsomme enn alger og blir utslagsgivende. Derfor brukes OEC-verdien folemna gibba med UF=0. PEC: (E)C50 tilgjengelig fra tre trofiske nivå. Vannplanter mest følsomme organisme. Derfor brukes EC50-verdien for L. gibba med UF=0 Tidligere MFI vannplante Fane - Tester Alle tester Test-type Test-varighet µg/l Art Litteratur Vis Alger kronisk Dafnia akutt Fisk akutt Fisk kronisk Vannplanter akutt Vannplanter kronisk 0h LC50 7500 4 0hEC50 0,8 3 4hEC50 80 Chlorella fusca vaculata 7h OEC 50 4 96h EC50 70000 Daphnia magna 48h LC50 894000 3 d OEC 0000 Daphnia magna 96h LC50 738000 Onchorhynchus mykiss d OEC 560000 Onchorhynchus mykiss 4d EC50 4,3 Lemna gibba 4d OEC Lemna gibba Fane 3 - Kommentarer Fane 4 - r Litteraturreferanser
Tribenuron-metyl European Commission Peer Review Programme. Tribenuron methyl Monograph, 003. Rapporteur Member Srata: Sweden. Pesticide Ecotoxicity Database, 00. Environmental Fate and Effects Division of the Office og Pesticide programs, U.S.EPA, Washington, D.C. 3 Tomlin ed.: The Pesticide Manual, 006 4 Biologische Bundesanstalt fur Land- und Forstwirtschaft. BBA- r. 800. 006 Fane 5 - Diverse info om preparatet Godkjenelsesdato: Fornyet godkjenning: 000 Trukket (dato): SpesialAnalyse Metode: #Feil Bestemmelsesgrense: 0,0 Dato siste gjennomgang: 0..007 #Feil Kommentarer
Vedlegg for Tribenuron-metyl Kilde: Svensk undersøkelse 004. Tribenuron methyl Tribenuron methyl is a sulfonylurea herbicide, intended for use in cereals and pasture. The mode of action is inhibition of the plant enzyme acetolactate synthase. The inhibition leads to rapid cessation of shoot and root cell division and growth. Tribenuron methyl has been evaluated within the framework of EU Dir. 9/44. SO HCO CO CH 3 CH 3 OCH 3 CH 3. Physico-chemical properties Physico-chemical properties of tribenuron methyl are summarised in table.. Table.: Physico-chemical properties of tribenuron methyl. Reference CAS-o. 000-48-0 Empirical formula C 5 H 7 5 O 6 S Molecular weight [g/mol] 395.4 Solubility in water [mg/kg] 48.9 at 0 ph 5 040 at 0 ph 7 8300 at 0 ph 9 pka 4.7 Vapour pressure [Pa] 5. 0-8 Log P ow.6 at ph 5 0.78 at ph 7 0.3 at ph 9 Henry s law constant [Pa m 3 /mol] 3 0 -. Toxicity to aquatic organisms The toxicity of tribenuron methyl to aquatic organisms is summarised in table.. Table.: Aquatic ecotoxicity data of tribenuron methyl. Species End-point Exposure duration Result [mg as/l] Reference Algae Chlorella fusca growth 4h EC 50 0.08 vaculata Aquatic plants Lemna gibba frond number 4d EC 50 0.0043 )
OEC 0.00 nominal Crustaceans Daphnia magna immobility 48h EC 50 >894 Daphnia magna immobility 96h EC 50 70 Daphnia magna growth d OEC 0 Fish Oncorhynchus mortality 96h LC 50 738 mykiss Lepomis mortality 96h EC 50 >000 macrochirus Oncorhynchus mykiss growth d OEC 560 ) Effect concentration basis for calculation of PEC. Test substance purity 9.6% The most sensitive (acute effects) of the tested species was Lemna gibba, with an EC 50 of 0.0043 mg/l and a OEC of 0.00 mg/l. Since the acute/chronic ratio is low and does not guarantee appropriate protection against acute effects, the PEC is based on acute toxicity data. Hence, the lowest EC 50 of 0.0043 mg/l is divided by a factor of 00, which results in a PEC of 4.3 0-5 mg/l..3 Bioaccumulation and persistence Tribenuron methyl has a low P ow, 0.3-.6, depending on ph, and is therefore not expected to bioaccumulate. In water tribenuron methyl degrades through hydrolytic cleavage, more rapidly at acidic conditions. In water/sediment systems the degradation occurs with a DT 50 of 3-3 in the water phase, and 7-3 days for the whole system. The major degradation products (exceeding 0%) in water are triazine amine, acid sulfonamide and saccarin. The metabolites are found mainly in water phase except triazine amine which partitions into sediment. Studies indicate that metabolites formed in water/sediment system are not more toxic to aquatic organisms than the parent compound..4 Proposed water quality objective Since PEC is 4.3 0-5 mg/l, the proposed water quality standard for tribenuron methyl is 4.0 0-5 mg/l..5 Comments Tribenuron methyl is rapidly transformed in aerobic soil (DT 50 days) to the metabolites triazine amine, acid sulfonamide and saccarin. Triazine amine degrades fairly rapid (DT 50 30 days), while acid sulfonamide and saccarin degrade more slowly, DT 50 65 days and 3 days. Tribenuron methyl may leach through the soil profile. Leach potential is increased in alkaline soils. Tribenuron methyl is not volatile.
.6 Literature () European Commission Peer Review Programme. Tribenuron methyl Monograph, 003. Rapporteur Member State: Sweden. () Pesticide Ecotoxicity Database, 00. Environmental Fate and Effects Division of the Office of Pesticide programs, U.S.EPA, Washington, D.C.