Dazomet
| 来源-本站收集整理 | 作者-本站 | 2012-05-23

Property Value Source/Quality Score/Other Information Interpretation
Solubility - In water at 20oC (mg l-1) 3500 A5 High
Solubility - In organic solvents at 20oC (mg l-1) 89700 A5 - Acetone -
28500 A5 - Ethyl acetate -
21300 A5 - Methanol -
8600 A5 - Toluene -
Melting Point (oC) 105 A5 -
Boiling Point (oC) Decomposes before boiling A4 -
Degradation point (oC) 150 A5 -
Flashpoint (oC) Not highly flammable A5 -
Octanol-water partition coefficient at pH 7, 20oC P 4.27 X 1000 Calculated -
Log P 0.63 A5 Low
Bulk density (g ml-1)/Specific gravity 1.37 L3 -
Dissociation constant (pKa) at 25oC Not applicable A5 -
Note: No dissociation
Vapour pressure at 25oC (mPa) 1.1 A5 Volatile
Henry's law constant at 25oC (Pa m3 mol-1) 5.10 X 10-05 A5 Non-volatile
Henry's law constant at 20oC (dimensionless) 1.20 X 10-08 K3 Non-volatile
GUS leaching potential index 1.34 Calculated Low leachability
SCI-GROW groundwater index (g l-1) for a 1 kg ha-1 or 1 l ha-1 application rate Value 9.98 X 10-03 Calculated -
Note -
Potential for particle bound transport index - Calculated Low
Maximum UV-vis absorption L mol-1 cm-1 pH 6.2 solution: 208nm = 7308, 228.5nm = 4209, 246nm = 6209, 260nm = 4631, 283nm = 11378, 300nm = 3682 A5 -
Surface tension (mN m-1) 64.9 A5 at 20oC -

Degradation:

Property Value Source/Quality Score/Other Information Interpretation
Soil degradation (days) (aerobic) DT50 (typical) 7 H4 Non-persistent
DT50 (lab at 20oC) 0.52 A5 Non-persistent
DT50 (field) 1.2 A5 Non-persistent
DT90 (lab at 20oC) 4.4 A5 -
DT90 (field) 3.8 A5 -
Note EU dossier lab studies DT50 range: 0.07-5.4 days, DT90 range 0.8-18.0 days; field studies DT50 0.9-1.6 days, DT90 range 2.6-4.6 days; Other sources: DT50 7 days (DW3)
Aqueous photolysis DT50 (days) at pH 7 Value 0.35 A5 Fast
Note DT50: 4 hrs in daylight, 7.3 hours in dark
Aqueous hydrolysis DT50 (days) at 20oC and pH 7 Value 0.2 A5 Non-persistent
Note Slightly vaiable with pH: DT50 0.4 days at pH 5, 0.1 days at pH 9 all at 25 degC
Water-Sediment DT50 (days) 0.52 A5 Fast
Water phase only DT50 (days) 0.45 A3 Fast

Soil adsorption and mobility:

Property Value Source/Quality Score/Other Information Interpretation
Linear Kd - DW3 Very mobile
Koc 10
Notes and range -
Freundlich Kf 1.13 A5 Moderately mobile
Kfoc 260
1/n 0.838
Notes and range EU dossier Kf range 0.808-1.834, kfoc range 129-394 mL/g, 1/n range 0.805-0.889, Soils=4
pH sensitivity No

Key metabolites:

Metabolite Formation Medium Estimated Maximum Occurrence Fraction 91/414 Relevancy
methyl isothiocyanate (Ref: SN-32866) Soil   0.740   Major fraction, Relevant
formaldehyde Soil   0.205   Major fraction, Relevant
methylamine Soil   0.092   Minor fraction, Not relevant
2,4-dimethyl-1,2,4-thiadiazolidine-5-thione Soil   0.450   Major fraction, Relevant

Other known metabolites:

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