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

OECD SIDS o-TOLUIDINE
Table 8 Geoaccumulative properties of o-toluidine (IUCLID 3.3.1)
Parameter Method Result Reference
Soil organic carbonwater
distribution
coefficient
Soil organic carbonwater
distribution
coefficient
Sediment organic
carbon-water
distribution coefficient
2.2.8 Environmental Monitoring
Occurrence
Calculated with PCKOCWIN, v. 1.66 Koc = 74 Bayer
AG, 2003
log Koc = 0.62 log Kow + 0.85 = 1.72 Koc = 52 Application of
the Koc-formula
for anilines
Determination of Kd between water of
the river Elbe and the sediment from
an aquifer located in Germany.
Koc = 0.87 Boernick,
Grischek and
Worch, 2001
Several natural occurrences of o-toluidine are reported (IARC, 2000). Toluidine (isomers not
specified, but o-toluidine likely to be present) occurs in vegetables like kale (Brassica oleracea),
celery (Apium graveolens), and carrots (Daucus carota). In beans (Phaseolus vulgaris), o-toluidine
was detected but could not be quantitatively determined with a determination limit of 0.1 mg/kg
fruit (Neurath et al., 1977). o-Toluidine occurs also in tocacco leaves (Irvine and Saxby, 1969) and
in the aroma of black tea (Vitzthum, Werkhoff and Hubert, 1975).
In the environment o-toluidine is also formed by reduction of o-nitrotoluene, e.g. at former
munitions sites. However, o-toluidine was degraded much faster than its precursor, o-nitrotoluene
(Van Aken and Agathos, 2002).
Toluidine (isomers not specified, but o-toluidine likely to be present) was detected as a component
of coal oil at a concentration of 135 mg/kg (Tomkins and Ho, 1982). o-Toludine is present in 77 %
of in total 65 Swiss and US gasoline samples (average 6.1 mg/l) and in their aqueous extracts
(average 0.47 mg/l) (Schmidt et al., 2002).
Water
Neurath et al. (1977) found o-toluidine in 3 of 9 samples of environmental waters in Northern
Germany. The highest value occurred in the river Alster (ca. 1 µg/l).
In 1979, Wegman and De Korte (1981) found several aromatic amines in surface waters of the
Netherlands. In 46 water samples (containing sediments) of the river Rhine from Lobith, the mean
o-toluidine concentration was 0.03 µg/l (3 samples above the determination limit of 0.02 µg/l,
maximum 1.8 µg/l). In its tributaries Boven Merwede and Issel the mean o-toluidine concentration
was 0.07 µg/l (1 sample of 12 above detection limit: 0.8 µg/l) and 0.2 µg/l (1 sample of 13 above
detection limit: 2.4 µg/l), respectively. 3 ground water samples from the vicinity of an US underground
coal gasification site, contained up to 9.2 µg/l toluidine (sum of o- and p-isomers)
(Stuermer, Ng and Morris, 1982).
o-Toluidine was detected in the effluents from refineries and production facilities, in river water,
process water, and ground water (CHIP, 1984).
o-Toluidine was monitored in several rivers in North Rhine-Westfalia in Germany (LWA
NRW, 1992). In 1991, o-toluidine was only detected in the Emscher (highest value: 1.8 µg/l,
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