LINEAR ALKYLBENZENE SULFONATE (LAS) - UNEP Chemicals

OECD SIDS LINEAR ALKYLBENZENE SULFONATE (LAS)
Mean LAS
concentration
(mg/L)
4.4
1.9
1.0
0.4
0.2
Control
Duplicate
Chambers
A
B
A
B
A
B
A
B
A
B
A
B
F1 Initial
young
numbers
0
0
4
9
32
37
29
59
52
58
77
91
Final F1 numbers F1 Females
Males Females
0
0
3
3
3
10
8
25
11
11
26
19
0
0
0
3
4
16
7
24
9
16
22
31
%
Survival
0
0
75
66
22
70
52
83
38
47
62
55
Final
number
gravid
0
0
0
0
1
3
2
4
8
Number
of births
Number
F2
produced
Reference: Arthur, J.W. 1970. Chronic effects on linear alkylbenzene sulfonate
detergent on Gammarus pseudolimnaeus, Campeloma decisum and Physa
integra. Water Res. 4:251-257.
Reliability: 4 Not assignable. Test substance is a formulation containing a mixture of
materials, of which only 14% is LAS. The contribution of each component
cannot be separately assigned.
(m)
Species: Mysidopsis bahia (marine mysid)
Results: NOEC = 0.12 mg/L (2 records)
Test Substance: LAS normalized to C11.6
Remarks: NOEC is geometric mean of 2 records
Reference: van de Plassche, E.J., de Bruijn, J.H.M., Stephenson, R.R., Marshall, S.J.,
Feijtel, T.C.J. and Belanger, S.E. 1999. Predicted no-effect concentrations
and risk characterization of four surfactants: LAS, AE, AES, and soap,
Environ. Toxicol. Chem. 18:2653-2663.
Reliability: 4 This study was given a reliability score of 4 because the original reports
reviewed by the authors were not directly reviewed in the compilation of this
robust summary.
(n)
Type of test: static [ ]; semi-static [ ]; flow-through [X]; other [ ]; open-system [X];
closed-system [ ]
Species: Gammarus pulex (amphipod)
Endpoint: Mortality [X]; Reproduction rate [X]; Other [ ]
Exposure period: Adults = 8 weeks; Juveniles = 15 weeks
Results: LC50 (adults; 56 days) > 354 µg/L
LC50 (juveniles; 107 days) > 375 µg/L
NOEC (number of offspring) = 97 µg/L
Analytical monitoring: Yes [X] No [ ] ? [ ]
Method: Two separate groups of field-collected adults in the pre-copulatory amplexus
and early juveniles were exposed to five concentration of LAS (nominally
30, 60, 120, 240, 480 µg/L) and control under flow-through conditions. The
exposure vessel consisted of a plastic trough that was 40 cm by 10 cm. The
water depth was approximately 3 cm with standpipe to drain and a 2 µm
stainless steel piece of mesh was placed approximately 5 cm from the end of
the vessel to prevent the loss of Gammarus. The solution was made up of a
1:1 mixture of pond water and carbon-filtered tap water. Mean measured
UNEP PUBLICATIONS 216
11
5
17
0
0
0
0
0
0
0
1
2
3
6
5
0
0
0
0
0
0
0
32
45
48
109
74