AMMONIUM SULFATE CAS N°: 7783-20-2

OECD SIDS
AMMONIUM SULFATE
4. ECOTOXICITY ID: 7783-20-2
DATE: 18.04.2006
Five eggs in each container and 40 spawn per concentration
were used. Same methods were employed for spawn and fry of
fish. Tests were repeated six times accompanied with
ocntrols. No death of eggs, spwan and fry were observed in
controls.
Reliability: (2) valid with restrictions
limited documentation, concentration range not reported
02-FEB-2004 (65)
Type:
static
Species:
Ictalurus punctatus (Fish, fresh water)
Exposure period: 24 hour(s)
Unit: mg/l Analytical monitoring: yes
Limit Test: no
Method: other: similar to those suggested by the USEPA (1975)
GLP:
no data
Test substance: other TS: ammonium sulfate, not further specified
Result:
When compared on the basis of un-ionized ammonia nitrogen
(NH3-N), ammonium chloride solutions were more toxic than
ammonium sulfate solutions. Median lethal concentrations
(24h- LC50s) at pH 8.8, 8.0, 7.2 and 6.0 were, respecitvely,
1.91, 1.45, 1.04, and 0.74 mg NH3-N/L for ammonium chloride,
and 2.24, 1.75, 1.16, and 0.81 mg NH3-N/L for ammonium
sulfate. Ionized ammonia (NH4) was not lethal at
concentrations up to 1787 mg NH4-N/L.
The author conclude that based on acute toxicity tests that
account for osmotic effects, NH4+ must be considered an
essentially nontoxic substance. The apparent increase in
toxicity of NH3 to channel catfish at lower pH is due to
osmotic effects of toxicant formulations, rather than
specifically to NH4.
Test condition: 8 static 24-h median lethal tests were conducted with 16-g
channel catfish. Fish were acclimated for at least 2 weeks
prior to testing. Feeding was stopped one week before use in
tests (minimize ammonia excretion by the fishes).
The 110-Liter aquaria held 80 liters of 21 °C water at various
pHs (6.0, 7.2, 8.0, 8.8). Each exposure group consisted of 10
fish. Buffers were added and fish acclimated for 24 hours
before ammonia (as ammonium sulfate or ammonium chloride) was
added.
Reliability: (2) valid with restrictions
limited documentation; 24-hour LC50 tests used.
23-JAN-2004 (66)
Type:
static
Species:
Oncorhynchus gorbuscha (Fish, fresh water)
Exposure period: 96 hour(s)
Unit: mg/l Analytical monitoring:
LC50: ca. 770
GLP:
Result:
no data
Late alevins (completion of yolk absorption) were the most
sensitive and had the lowest 96-hour LC50 values.
Concentrations as low as 1.2 ppb reduced fry weight in the
61 day exposures. Only levels > 10 ppb stimulated early
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