AMMONIUM SULFATE CAS N°: 7783-20-2

OECD SIDS
AMMONIUM SULFATE
4. ECOTOXICITY ID: 7783-20-2
DATE: 18.04.2006
Result:
Test condition:
regime.
An LC50 value of 181 ppm was observed at 22.0 °C.
An LC50 value of 63 ppm was observed at 32.5 °C.
TEST ORGANISMS: Test organisms were collected from local
ponds and acclimated to laboratory conditions for 10 to 96
hours. TEST VESSEL: 500 ml glass beakers containing
unchlorinated borehole water (pH 7.5; DO 7.6 ppm; total
alkalinity 190 ppm as CaCO3; ammonia nitrogen 0.05ppm) TEST
METHODOLOGY: Twenty animals were kept per vessel, and four
replicates of each test were conducted, along with controls.
Bioassays were conducted after the method of APHA, AWWA, and
WPCF (1971): Standard method for the examination of water
and wastewater, 13th Ed. APHA Inc, New York, 874. 96 hour
tests were carried out for insects and molluscs. Test
temperatures were 22.0 + 1.1 0C and 32.5 + 1.3 0C. 500
organisms were used in this test, a similar test using
another substance, and the controls. The LC50 and LC 95
values were determined by probit analysis.
Reliability: (3) invalid
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Type:
static
Species:
other: Biomphalaria alexandria (freshwater snails)
Exposure period: 168 hour(s)
Unit: mg/l Analytical monitoring: no
EC50: < 1000
Limit Test: no
Method:
Test substance:
other: see Test Condition
other TS: ammonium sulfate, no further details
Remark:
From observation of figure 1 in the paper, the LC 50 value
will lie between 400 and 600 ppm ammonium sulfate.
Result: Quoting the paper "1000 ppm of ammonium sulfate caused 100%
mortality." "Results in this study give some support to
the suggestion of Tchounwou ( referred to as "Tchounwou,
B.P., Englande, J. R., and Malek, E.A.: Arch. Environ.
Contam. Toxicol. 21, 359(1991)") who reported that in very
dilute solution, the toxicity of certain fertilizers may be
attributed to the formation of unionized ammonia, while in
high concentrations of the compounds rapid mortality may be
due to the activity of the sol
Test condition: TEST ORGANISMS: Biomphalaria alexandria snails were obtained
from Abu-Rawash, Giza Governate, Egypt, and were maintained
in the laboratory under suitable conditions of aeration,
temperature (250C), and feeding. Other test conditions as
given in reference M. I. Nassar and A. Z. Abdel-hamid
(1993). Phytochemical and Molluscidial screening of some
local plants. Bull. NRC, Egypt, Vol 18 (4), pp 335-341.)
EXPOSURE PERIOD: 7 days.
Reliability: (3) invalid
Time of the LC50 test not explicitely stated in this paper.
pH not measured. Ionic strength not measured.
Concentrations not measured. Very limited documentation of
results. Secondary quotation.
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