AMMONIUM SULFATE CAS N°: 7783-20-2

OECD SIDS
AMMONIUM SULFATE
4. ECOTOXICITY ID: 7783-20-2
DATE: 18.04.2006
fingerlings of the same species.
Results from the tests with hatchlings were as follows:
- C. carpio: LC50 77 mg/L (LC5 13 mg/L, LC95 141 mg/L;
n=160).
- L. rohita, C. catla, C. mringala: LC50 49 mg/L (LC5 7
mg/L, LC95 85 mg/L; n=146).
Test condition: Fishes were purchased from local farms and were acclimated
to the laboratory conditions for 96 hours. The mean lengths
and weights of the fishes used were as follows:
- Labeo rohita 48+/- 3.2 mm, 1.634 +/- 0.183 g
- Catla catla 49 +/- 1.5 mm, 3.495 +/- 0.311 g
- Cirrhinus mrigala 24 +/- 1.1 mm, 0.46 +/- 0.046 g
- Cyprinus carpio 41 +/- 1.5 mm, 1.374 +/- 0.076 g
- Tilapia mossambica 42 +/- 2.5 mm, 1.719 +/- 0.197 g.
Hatchlings of major carps and Cyprinus carpio were
acclimated for 2 hours to the laboratory conditions.
The experiments were performed in the laboratory at 30.8 +/-
1.2 °C, using unchlorinated borehole water (DO 9.9, total
alkalinity 290 ppm as CaCO3, pH 7.5).
Tests were run for 96 hours in 15 L glass aquaria for
fingerlings and in 500 mL glass beakers for hatchlings
according to the APHA methods (1975). Two to four fishes in
each aquarium and 8-16 fishes per concentration, and 25
hatchlings in each beaker were tested.
All tests were repeated five to eight times acompanied with
controls.
The following chemicals were tested: urea, ammonium sulfate,
superphosphate, muriate of potash, and lime.
Reliability: (2) valid with restrictions
limited documentation
23-AUG-2005 (62)
Type:
semistatic
Species:
other: Heteropneustes fossilis
Exposure period: 10 day(s)
Unit: mg/l Analytical monitoring: no data
Method:
GLP:
Test substance:
Result:
Test condition:
88
other: see Test Condition
no data
other TS: ammonium sulfate, not further specified
The goblet cells show cyclic increased (due to hyperplasia
and hyperactivity) followed by decrease (due to exhaustion
and degenration) mucogenic activity. Cyclic hemorrhage takes
place due to rupture of the tips of the secondary lamellae,
which also regenerate several times. This causes hyperplasia
of the haphazardly arranged epithelial cells, leading to
decreased secondary lamellar density. Uncomtrolled
hyperplasia also causes increased distance of respiratory
blood-air barrier, which along with decreased lamellar
density results in impaired aerial respiration, leading to
asphyxiation and ultimate death of the fish.
H. fossilis (length 16 +/- 2 cm) collected locally were
acclimated in the laboratory for 20 days in tap water in
plastic aquaria. They were regularly fed with minced goat
liver. Feeding was discontinued one day before the start of
the experiment. Ten groups of 10 fish each, irrespective of
their sex, were exposed to 50 L of 2000 ppm of ammonium
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