Registration Dossier

Administrative data

Endpoint:
distribution modelling
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
supporting study
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
The EPISuite program developed by the U.S. Environmental Protection Agency and Syracuse Research Corporation has not been validated for chemicals that contain silanes in their molecular structure; therefore, there is uncertainty associated with the calculated value and it should be used with caution whenever reported; the estimated value reported here is assigned reliability codes of 4.

Data source

Reference
Reference Type:
other: Estimations Programs
Title:
Unnamed
Year:
2007

Materials and methods

Model:
calculation according to Mackay, Level III

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Any other information on results incl. tables

Degradation:= 50% after 0.85 Days (indirect photolysis
only); = 50% after 0.65 Days (indirect photolysis and
hydrolysis)

Level III fugacity modelling, using loading rates of 1000 kg/h each for  air, soil and water, shows the following percent distribution when it is  released simultaneously to all three compartments: Air = 0.89 %, Water =  6.69 %, Soil = 92.4 %, and Sediment < 0.1, as shown below:

Level III Fugacity Model (Full-Output):
=======================================
  Chem Name   : (2-Cyanoethyl)triethoxysilane (Simulation
20061013)
  Molecular Wt: 217.34
  Henry's LC  : 3.98e-009 atm-m3/mole (calc VP/Wsol)
  Vapor Press : 0.0139 mm Hg  (user-entered)
  Log Kow     : 0.31  (user-entered)
  Soil Koc    : 0.837  (calc by model)

           
      Mass Amount           Half-Life           Emissions
           
       (percent)                 (hr)                 (kg/hr)
   Air      
       0.89                      15.5                1000       
   Water    
     6.69                      6.45               1000       
   Soil     
       92.4                    62.7                 1000       
   Sediment  
    0.000307                6.5                  0          

        Fugacity Reaction Advection Reaction Advection
        (atm)    (kg/hr)  (kg/hr)    (%)     (%)
Air     1.67e-012 66.3    14.9        2.21   0.496     
Water   1.02e-015 1.2e+003 11.2       40.1   0.373     
Soil    4.9e-013  1.71e+003 0         56.9        
Sediment 2.3e-017 0.0547  1.03e-005  0.00182 3.42e-007 

Persistence Time: 55.7 hr
   Reaction Time:    56.2 hr
   Advection Time:   6.41e+003 hr
   Percent Reacted:  99.1
   Percent Advected: 0.868

   Half-Lives (hr), (based upon user-entry):
      Air:      15.53
      Water:    6.453
      Soil:     62.74
      Sediment: 6.495

   Advection Times (hr):
      Air:      100
      Water:    1000
      Sediment: 5e+004

Applicant's summary and conclusion

Conclusions:
The results are inconsistent with the rapid hydrolysation of CNE, the estimated low log Kow of 1.7 and the high solubility of the hydrolysis products. The modelling used the US EPA EPISuite program, which has not been validated for chemicals that contain silanes in their molecular structure; therefore, there is uncertainty associated with the calculated values and the results will not be used further in this CSR.