o-TOLUIDINE CAS N°: 95-53-4 - UNEP Chemicals

OECD SIDS o-TOLUIDINE
3. ENVIRONMENTAL FATE AND PATHWAYS ID: 95-53-4
DATE: 07.01.2005
3.1.1 PHOTODEGRADATION
Type : air
Light source :
Light spectrum : nm
Relative intensity : based on intensity of sunlight
INDIRECT PHOTOLYSIS
Sensitizer : OH
Conc. of sensitizer : 500000 molecule/cm³
Rate constant : .0000000001321 cm³/(molecule*sec)
Degradation : = 50 % after 2.9 hour(s)
Deg. product :
Method : other (calculated): with AOPWIN v. 1.91 (2000)
Year : 2003
GLP :
Test substance :
Remark : In deviation from the U.S. EPA AOPWIN (calculation program) the
calculated half-life is based on a mean OH radical concentration of 5E+05
OH radicals/cm3 as a 24 h average.
Reliability : (2) valid with restrictions
Accepted calculation method
Flag : Critical study for SIDS endpoint
08.06.2004 (26)
Type : water
Light source : other: blacklight fluorescent lamps, 40 W in total
Light spectrum : nm
Relative intensity : based on intensity of sunlight
Conc. of substance : 10.7 mg/l at 25 °C
INDIRECT PHOTOLYSIS
Sensitizer : other: TiO2 (anatase from Degussa (type P25) with 30 nm particle size and
a surface area of 50 m2/g)
Conc. of sensitizer :
Rate constant : cm³/(molecule*sec)
Degradation : 50 % after 4.2 hour(s)
Deg. product :
Method : other (measured): TiO2 and UV-light as a waste water remediation system
Year : 2002
GLP : no data
Test substance : other TS: Several anilines inlcuding o-toluidine, reagent grade
Method : - The experiments were carried out in a batch-type photoreactor.
- The reaction vessel was a pyrex glass cylinder with a volume of
approximately 1000 ml. 5 x 8 W blacklight fluorescent lamps (UV, mostly
near 360 nm) were mounted side by side onto the inner surface.
- The incident light intensity was measured by means of a potassium
ferrioxalate actinometer and found to be 3.1E-07 Einsteins/s.
Remark : A method on abiotic removal by UV-light and TiO2 was studied to improve
the removal of high amounts of aniline derivatives during the waste water
treatment.
Result : A degradation rate constant (k) of 2.75E-03 (1/min) was determined for otoluidine.
Results indicate that the photocatalytic degradation of o-toluidine in
aqueous TiO2 suspensions can be described by a first order kinetic
equation model.
Based on this equation a t1/2 of 252 min could be calculated.
Test condition : - The suspension (600 ml) was previously stirred in an ultrasonic bath for
15 minutes in the dark.
- An amount of TiO2 (anatase from Degussa (type P25) with 30 nm particle
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