Chemistry Reference
In-Depth Information
Fig. 1 Structures of two
hexachlorocyclohexane
isomers (
1
)
a
-HCH, (
2
)
g
-HCH
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
1)
2)
Table 1 Selected physico-chemical properties of studied POPs at 278 K [
14
-
20
]
POPs
Mol Wt.
a
P
L
b
log
K
ow
c
H
e
Fluorene
166
0.72
4.2
7.9
Phenanthrene
178
0.11
4.6
3.2
10
2
Anthracene
178
7.8
4.5
4.0
10
3
Fluoranthene
202
8.7
5.2
0.6
10
2
Pyrene
202
1.2
5.2
0.9
10
4
Benz[
a
]anthracene
228
6.1
5.9
0.6
10
4
Chrysene
228
1.1
5.9
0.2
Benzo[
b
+
j
]fluoranthene
252
5.8
0.15
10
6
Benzo[
k
]fluoranthene
252
4.1
6.0
0.11
10
5
Benzo[
a
]pyrene
252
2.1
6.0
0.045
Indeno[123-
cd
]pyrene
276
10
8
Dibenz[
ah
]anthracene
278
9.2
6.8
0.069
10
8
Benzo[
ghi
]perylene
276
1.4
6.5
0.076
3.1
10
3
HCB
285
5.5
53
7.3
10
3
a
-HCH
181
3.9
0.10
1.9
10
3
g
-HCH
181
3.9
0.061
8.0
10
2
PCB18
257
5.6
32
2.0
10
2
PCB28
257
5.8
29
1.0
10
2
PCB52
292
6.1
32
6.0
10
3
PCB70
292
6.3
17
3.0
10
3
PCB101
326
6.4
25
2.0
10
3
PCB110
326
6.3
20
5.0
10
4
PCB138
361
7.0
13
10
4
PCB153
361
2.0
6.9
17
10
5
PCB180
395
1.0
6.9
11
10
5
PCB194
430
1.0
7.6
29
a
Molecular weight (amu)
b
Sub-cooled liquid vapour pressure (Pa)
c
Logarithm of the octanol-water partition coefficients
d
Henry's law constants (Pa m
3
/mol)
2.1.2 Hexachlorobenzene
HCB (Fig.
2
) was used mainly as fungicide in wood and seed treatment, but it is also
a by-product of several chlorination procedures for the production of organochlo-
rine solvents, plastics and in the secondary aluminium industry (Fig.
3
). A total
