72h NOEC 3,3 Scendesmus subspicatus 3. 21d NOEC LC Pimephales promelas. 21d NOEC AMF basert på PNEC1 Laveste L(EC) ,6

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1 Terbutylazin Fane - Preparat Handelsnavn: Gardoprim Herbicid Tester CasNr: Test-type Test-varighet µg/l Art Litteratur PNEC PNEC Alger kronisk Dafnia akutt Dafnia kronisk Fisk akutt Fisk kronisk Vannplanter akutt Vannplanter kronisk 7h EC50 6 Scendesmus subspicatus 3 7h NOEC 3,3 Scendesmus subspicatus 3 96h EC50 09 Mysidopsis bahia d NOEC 50 4 LC Pimephales promelas d NOEC d EC50 6 Lemna gibba 4d NOEC Lemna gibba Basert på µg/l Usikkerhetsfaktor Verdi (µg/l) AMF basert på PNEC Laveste L(EC)50 6 0,6 MF basert på PNEC LavesteNOEC 0 0, Vurderingsgrunnlag for usikkerhetsfaktor: PNEC: NOEC tre trofiske nivå. NOECverdien for Lemna gibba brukes med med UF=0 PNEC:L(E)C50 tilgjengelig fra tre trofiske nivå. Alger og vannplanter er mest følsomme og EC50-verdien for S. subspicatus og L. gibba brukes med UF=0 Tidligere MFI alge,6 Fane - Tester Alle tester Test-type Test-varighet µg/l Art Litteratur Vis Alger kronisk Dafnia akutt Dafnia kronisk Fisk akutt Fisk kronisk Vannplanter akutt Vannplanter kronisk 0h LC h EC50 6 Scendesmus subspicatus 3 7h NOEC 3,3 Scendesmus subspicatus 3 96h EC50 09 Mysidopsis bahia d NOEC 50 4 LC Pimephales promelas d NOEC d EC50 6 Lemna gibba 4d NOEC Lemna gibba Fane 3 - Kommentarer PNEC: NOEC tre trofiske nivå, men kronisk NOEC for Daphnia magna er høyere enn akutt EC50 for krepsdyret Mysidopsis bahia. Vannplanter er imidlertid mye mer følsomme og blir utslagsgivende. NOECverdien for Lemna gibba brukes med med UF=0 Fane 4 - r Litteraturreferanser

2 Terbutylazin Fisher, S., 988. Ekotoxikologisk utvardering av terbutylazin. National Chemicals Inspectorate, Sweden. Pesticide Ecotoxicity Database, 00. Environmental Fate and Effects Division of the Office og Pesticide programs, U.S.EPA, Washington, D.C. 3 Hanze, K.,995: Ecotoxikologisk evaluation of the herbicide Terbuthylazine- Supplement to Ecotoxicological Evaluation in 988. National Chemicals Inspectorate, Sweden. 4 Biologische Bundesanstalt fur Land- und Forstwirtschaft. BBA-Nr Fane 5 - Diverse info om preparatet Godkjenelsesdato: Fornyet godkjenning: Trukket (dato): 966 SpesialAnalyse Metode: 3 M60 Bestemmelsesgrense: 0,0 Dato siste gjennomgang: GC-MULTI Kommentarer

3 Vedlegg for Terbutylazin Kilde: Svensk undersøkelse 004. Terbuthylazine Terbuthylazine is an herbicide mainly taken up by the roots. The substance is no longer in use in Sweden. The intended use was weed control in cereals. Cl N NHC(CH 3 ) 3 N N NHCH CH 3. Physico-chemical properties Physico-chemical properties of terbuthylazine are summarised in table.. Table.: Physico-chemical properties of terbythylazine. Reference CAS-No Empirical formula C 9 H 6 ClN 5 4 Molecular weight [g/mol] Solubility in water [mg/kg] 8.5 at ph 7 and 0 C 4 pka.0 4 Vapour pressure [Pa] Log P ow 3. 4 Henry s law constant [Pa m 3 /mol] Toxicity to aquatic organisms The toxicity of terbuthylazine to aquatic organisms is summarised in table.. Table.: Aquatic ecotoxicity data of terbuthylazine. Species End-point Exposure duration Result [mg as/l] Reference Algae Scenedesmus biomass 7 h, static E b C subspicatus NOE b C Microcystis biomass 96 h, static E b C aeruginosa Chlorella pyrenoidosa Chlorococcum sp. Anabaena variabilis Lyngbya sp. 4 h, static 4 h, static 48 h, static 4 h, static NOE b C 0.0 EC EC EC EC EC 50 EC EC 50 <0.0

4 3 EC 50 <0.0 Higher aquatic plants Lemna gibba 4 d, static EC NOEC 0.00 ) Lemna gibba frond germination 4 d, static EC EC Crustaceans Daphnia magna immobilisation 96 h, static EC Mysidopsis bahia 96 h, static EC Daphnia magna immobilisation 48 h, static EC 50 Fish mortality 96 h, static LC Oncorhynchus mortality 96 h, static LC mykiss Oncorhynchus mykiss Cyprinus carpio Ictalurus punctatus Poecilia reticulata Pimephales promelas Ictalurus punctatus Salvelinus fontinalis Notemigonus crysoleucas mortality 96 h, static LC LC LC 50 7 LC 50 5 LC 50.6 mortality 96 h, flow-through LC 50.8 LC LC 50. LC 50. LC ) Effect concentration basis for calculation of PNEC. Test substance purity 97.%. The most sensitive of the tested species is Lemna gibba, with an EC 50 of 0.06 mg/l and a NOEC of 0.00 mg/l. Chronic toxicity data origin from the trophic levels primary consumers, algae and higher aquatic plants. In the absence of chronic toxicity data for crustacean and fish, PNEC is based on NOEC 0.00 mg/l and divided by a factor of 00, which results in a chronic PNEC of mg/l..3 Bioaccumulation and persistence Terbuthylazine is not expected to bioaccumulate. BCF is 34 in, whole fish. Hydrolysis and photolysis occurs slowly. Time for degradation is very long..4 Proposed water quality objective Since PNEC is mg/l, the proposed water quality standard for terbuthylazine is 0-5 mg/l.

5 .5 Comments Mobility through soil is expected to be high (K oc 60-00). Terbuthylazine has several metabolites but none of them are more toxic than terbuthylazine..6 Literature () Fischer, S., (988). Ekotoxikologisk utvärdering av terbutylazin. National Chemicals Inspectorate, Sweden. () Hanze, K., (995). Ecotoxicological evaluation of the herbicide Terbuthylazine Supplement to Ecotoxicological Evaluation in 988. National Chemicals Inspectorate, Sweden. (3) Pesticide Ecotoxicity Database, 00. Environmental Fate and Effects Division of the Office of Pesticide programs, U.S.EPA, Washington, D.C. (4) Tomlin, C., 000. The Pesticide Manual, th edition. British Crop Protection Council.