N-(1,3-Dimethylbutyl)-N

OECD SIDS
N-(1,3-DIMETHYLBUTYL)-N´-PHENYL-1,4-PHENYLENEDIAMINE
3. ENVIRONMENTAL FATE AND PATHWAYS ID: 793-24-8
DATE: 11.05.2005
INDIRECT PHOTOLYSIS
Sensitizer : OH
Conc. of sensitizer : 500000 molecule/cm³
Rate constant : .0000000003479 cm³/(molecule*sec)
Degradation : 50 % after 1.1 hour(s)
Deg. product :
Method : other (calculated): calculation according to Atkinson
Year : 1996
GLP :
Test substance :
Reliability : (2) valid with restrictions
Accepted calculation method
06.05.2003 (5)
3.1.2 STABILITY IN WATER
Type : Abiotic
t1/2 pH4 : at °C
t1/2 pH7 : 21.5 hour(s) at 50 °C
t1/2 pH9 : at °C
Deg. product : Yes
Method : other: test design comparable to OECD Guideline 111
Year : 2002
GLP : No
Test substance : other TS: 4-ADPA, 99.18 % purity
Deg. products : 122-37-2 204-538-9 4-anilinophenol
Method : Tests were performed in order to examine the influence of light, air, and
nutrient medium on the stability of 4-aminodiphenylamine.
Study design similar to OECD Guideline 111 but environmental parameters
modified to facilitate interpretation of ecotox studies.
Radiation, redox (aerobic instead of anaerobic), and nutrient medium
conditions simulated those used in ecotoxicological tests. Temperatur
dependency was examined in another study [Bayer AG (2002) Abiotic
degradation of 4-Aminodiphenylamine. GLP Final Report. Unpublished
study (2002-09-19)].
Analytical monitoring of test substance and main metabolite (4-
hydroxydiphenylamine) using HPLC with UV detection. Analysis was
performed immediately after sampling. Additionally 2 other metabolites
appearing in the chromatogram were measured and quantified under the
same conditions and calculated as 4-ADPA.
Remark : 4-Aminodiphenylamine (4-ADPA) has a structure similar to that of 6PPD,
except that the alkyl group is missing
Result : In test 2 a t1/2 of 25.7 hours was observed (compared to t1/2 21.5 h in test
1) showing that radiation has no relevant influence on the stability of the
test substance under these conditions.
In test 3 the medium containing traces of heavy metals such as Mn, Co,
Cu, Mo and Zn might be responsible for the reduced half life time of the
compound (7.4 hours). In this medium t1/2 at 20 degree C was calculated
to about 2.5 days using the factor 2 derived from the first study [Bayer AG
(2002). Abiotic degradation of 4-Aminodiphenylamine. GLP Final Report.
Unpublished study (2002-09-19).] representing an extrapolation from 50 °C
down to 20 °C.
In test 4, in darkness and under unaerobic conditions in the beginning of
the experiment, 4-ADPA appeared to be stable for (at least) 24 h.
In the time course of the experiments, the formation and consecutive
degradation of 4-Hydroxydiphenylamine was observed. The maximum
concentration of 4-Hydroxydiphenylamine was about 7 % of the initial 4-
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