Registration Dossier

Administrative data

Endpoint:
distribution modelling
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: based on EPIWIN 4.0

Data source

Reference
Reference Type:
other: calculation
Title:
Unnamed
Year:
2010
Report Date:
2010

Materials and methods

Model:
calculation according to Mackay, Level III
Calculation programme:
EPISUIT, v.4.0
Release year:
2 008
Media:
air - biota - sediment(s) - soil - water

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Percent distribution in media

Air (%):
0.192
Water (%):
81.3
Soil (%):
17.6
Sediment (%):
0.918

Any other information on results incl. tables

Level III Fugacity Model:

Mass Amount         Half-Life         Emissions

(percent)             (hr)                   (kg/hr)

Air             0.192                     0.125                  1000

Water          81.3                        360                      1000

Soil            17.6                        720                      1000

Sediment      0.918                3.24e+003                0

Persistence Time: 75.9 hr

Volatilization from Water:

Henry LC: 0.0388 atm-m3/mole (estimated by Bond SAR Method)

Half-Life from Model River:     1.005 hours

Half-Life from Model Lake :     92.33 hours  (3.847 days)

 

Removal In Wastewater Treatment:

Total removal:             94.65 percent

Total biodegradation:       0.08 percent

Total sludge adsorption:   18.10 percent

Total to Air:              76.48 percent

(using 10000 hr Bio P,A,S)

Atmospheric Oxidation (25 deg C) [AopWin v1.92]:

Hydroxyl Radicals Reaction:

OVERALL OH Rate Constant = 61.1919 E-12 cm3/molecule-sec

Half-Life =    0.175 Days (12-hr day; 1.5E6 OH/cm3)

Half-Life =    2.098 Hrs

Ozone Reaction:

OVERALL Ozone Rate Constant =   20.000000 E-17 cm3/molecule-sec

Half-Life =    0.057 Days (at 7E11 mol/cm3)

Half-Life =     1.375 Hrs

Fraction sorbed to airborne particulates (phi):

2.07E-008 (Junge-Pankow, Mackay avg)

1.24E-007 (Koa method)

Note: the sorbed fraction may be resistant to atmospheric oxidation

Applicant's summary and conclusion

Conclusions:
Norbornene will be primarily distributed to the aqueous compartment.
Executive summary:

Model calculations on fugacity show that the dominant compartement is water (ca. 81%), followed by soil (ca. 18%). Presence in air and sediment is negliglible. Volatilisation from water was calculated with a half live of ca. .1h (river model) and ca. 4 days (lake model).

Removal from Wastewater Treatment was calculated with a total removal of 95%, removal to air was shown to be the dominant process. Atmospheric oxidation at 25°C was calculated with AopWin v1.92 and half lifes for hydroxyl radicals reaction and ozone reaction were calculated as ca. 2.1 and 1.4 h respectively.