Cyanoguanidine CAS NÂ°: 461-58-5

More documents

Recommendations

Info

OECD SIDS CYANOGUANIDINE 3. ENVIRONMENTAL FATE AND PATHWAYS ID: 461-58-5 DATE: 25.02.2004 Type : field trial Radiolabel : Concentration : Soil temp. : degree C Soil humidity : Soil classif. : Year : Remark : Breakdown of Dicyandiamide in quartz sand and soils Under different moisture conditions the breakdown of dicyandiamide (DCD) was investigated in quartz sand with metal oxides and in soils. 1. In quartz sand without metal oxides DCD did not change over 100 days. 2. In the presence of amrphous Fe(III)-hydroxide DCD was transformed to guanyluera after 5 days to 50 % and after 40 days to 90 %. The transformation rate depended on the kind of metal oxides and increased with low humidity. Other metabolites were not detected in quartz sand medium. 3. In two soils (pH 6.5, 6.3; sandy silty loam and sand) the breakdown of DCD to guanylurea followed the same pattern, but continued to ammonium. About 20 - 70 % of the added amount was transformed within 100 days. 4. With increasing soil moisture the transformation of DCD to guanylurea was slower, but the further breakdown to ammonium increased. 5. As long as DCD was present the formation of nitrate was blocked. Reliability : (4) not assignable 26.11.2003 (4) Type : field trial Radiolabel : Concentration : Soil temp. : degree C Soil humidity : Soil classif. : Year : Remark : Effect of temperature on the breakdown of dicyandiamide in the soil The breakdown of dicyandiamide in a soil (sandy silty loam, pH 6.2, 0.13 % N) was investigated in relation of temperature. 1. The rate of conversion of dicyandiamide (DCD) (20 mg DCD-N/100 g soil) to guanylurea increased with rising temperature (10-90 degree C). After 20 days, 14 - 100 % of the added DCD was metabolized. Small amounts of DCD (0.67 resp. 1.34 mg DCD-N/100 g soil) were broken down completely within 20 - 80 days at 8 - 20 degree C. 2. Guanylurea was transformed to guanidine and then to ammonium. Increasing temperature in the region of 10 and 30 degree C accelerated the transformation. At higher temperatures (up to 70 degree C) an accumulation of guanidine occurred. Reliability : (4) not assignable 26.11.2003 (59) 3.2 MONITORING DATA 3.3.1 TRANSPORT BETWEEN ENVIRONMENTAL COMPARTMENTS 3.3.2 DISTRIBUTION Media : air - biota - sediment(s) - soil - water Method : Calculation according Mackay, Level III Year : 2003 34 UNEP PUBLICATIONS
OECD SIDS CYANOGUANIDINE 3. ENVIRONMENTAL FATE AND PATHWAYS ID: 461-58-5 DATE: 25.02.2004 Method : Distribution were calculated with the following factors cyanoguanidine weight: 84.08 melting point [degree]: 209.5 vapour pressure [Pa]: 4.50E-03 water solubility [g/m3]: 40000 log Kow: -0.52 [25 degree] half life [hr] in air: 3.1 in water: 5712 in soil: 5712 in sediment: 17136 Result : The potential environmental distribution of cyanoguanidine obtained from a generic fugacity model Mackay level III under three emission scenarios is shown as below. ----------------- -------------------- ------------------ ------------------ Compartment Amount % Release 100% Release 100% Release 100% to air % to water % to soil % ----------------- -------------------- ------------------ ------------------ Air 0.0 0.0 0.0 Water 48.3 99.6 42.1 Soil 51.5 0.0 57.8 Sediment 0.2 0.4 0.2 ----------------- -------------------- ------------------ ------------------ Source : Chemicals Evaluation and Research Institute, Japan (2002):report on generic fugacity model (Mackay level III) Reliability : (2) valid with restrictions Flag : Critical study for SIDS endpoint 31.07.2003 3.4 MODE OF DEGRADATION IN ACTUAL USE 3.5 BIODEGRADATION Type : aerobic Inoculum : activated sludge Concentration : 25mg/l related to related to Contact time : Degradation : = 0 % after 28 day Result : under test conditions no biodegradation observed Deg. Product : Method : other: OECD guide-line "Ready biodegradability test" Year : GLP : no data Test substance : Remark : OECD manometric respirometry test: various source of inoculum; test substance as sole source of organic carbon, oxygen uptake as percent of the ThOD or COD. Source of inoculum: location; Schmallenberg (number of inhabitants: 15000), Lennestadt-Maumke (number of inhabitants: 30000) in Germany Result : No biodegradation was observe in both tests. Reliability : (2) valid with restrictions Flag : Critical study for SIDS endpoint 26.11.2003 (47) Type : aerobic UNEP PUBLICATIONS 35
Page 1 and 2: OECD SIDS CYANOGUANIDINE FOREWORD I
Page 3 and 4: OECD SIDS CYANOGUANIDINE SIDS INITI
Page 5 and 6: OECD SIDS CYANOGUANIDINE SIDS Initi
Page 7 and 8: OECD SIDS CYANOGUANIDINE 2.2.4 Tran
Page 9 and 10: OECD SIDS CYANOGUANIDINE Eye Irrita
Page 11 and 12: OECD SIDS CYANOGUANIDINE 3.1.6 Muta
Page 13 and 14: OECD SIDS CYANOGUANIDINE This subst
Page 15 and 16: OECD SIDS CYANOGUANIDINE [Zacherl e
Page 17 and 18: OECD SIDS CYANOGUANIDINE Matsushima
Page 19 and 20: OECD SIDS CYANOGUANIDINE 1. GENERAL
Page 27 and 28: OECD SIDS CYANOGUANIDINE 2. PHYSICO
Page 29 and 30: OECD SIDS CYANOGUANIDINE 2. PHYSICO
Page 31 and 32: OECD SIDS CYANOGUANIDINE 3. ENVIRON
Page 33: OECD SIDS CYANOGUANIDINE 3. ENVIRON
Page 41 and 42: OECD SIDS CYANOGUANIDINE 4. ECOTOXI
Page 53 and 54: OECD SIDS CYANOGUANIDINE 5. TOXICIT
Page 73 and 74: OECD SIDS CYANOGUANIDINE 6. REFEREN
Page 75: OECD SIDS CYANOGUANIDINE 6. REFEREN

Cyanoguanidine CAS NÂ°: 461-58-5

Create successful ePaper yourself

Delete template?

Save as template?