AMMONIUM SULFATE CAS N°: 7783-20-2

OECD SIDS
AMMONIUM SULFATE
4. ECOTOXICITY ID: 7783-20-2
DATE: 18.04.2006
interface of each tank received approximately 50 ft-c of
cool-white fluorescent light.
BIOLOGICAL PARAMETERS: biological observations were made
daily. Survival, condition and behavioural information were
recorded. Dead organism were removed when observed. If more
than one-half of the population exposed in any treatment was
found to be dead, additional aquaria containing lower
concentrations of test soution were set up.
EXPOSURE PERIOD: 96 hours.
TEST CONCENTRATION: 100, 10, 1 and 0.1 mg/l
STATISTICAL METHOD: The 96-h LC50 value was derived using an
interpolation method as described by Stephan (Stephan CE:
Methods for calculating an LC50: Aquatic toxicology and
hazard evaluation. In: FL Mayer and JL Hamelink, eds., STP
634. American Society for Testing and Materials,
Philadelphia, PA, pp. 65-84). The linear interpolation uses
the logarithm transformation of the concentration and the
angle transformation of the percent dead between the two
doses that bracket 50% response.
YEAR OF STUDY: not reported.
Reliability: (2) valid with restrictions
concentration not measured. Limited documentation of
results.
Flag:
Critical study for SIDS endpoint
26-JAN-2004 (59)
Type:
flow through
Species:
Asellus intermedius (Crustacea)
Exposure period: 96 hour(s)
Unit: mg/l Analytical monitoring: no
LC50 : > 100
Method:
GLP:
Test substance:
Remark:
Result:
Test condition:
other: see Test Conditions
no
other TS: ammonium sulphate, reagent-grade, no further details
In this study, 27 commercial inorganic and organic
chemicalswere tested simultaneously in seven aquatic species.
A LC50 value could not be determined because the proportion
killed at the highest dose level (100 mg/L) was less than
50%. No further details reported.
TEST ORGANISMS: Pillbug (Asellus intermedius), 0.012 g. The
test organisms were acclimated to the control diluent water
in the breeding/rearing tanks (time period not reported).
Food was withheld for the 24 hours preceding start of the
test. Juveniles as uniform in size as possible were
collected from the colonies. Ten juvenile organisms were
exposed to the test chemical in each treatment. Biological
loading was kept below 0.5 gram wet weight per liter of
testsolution.
TEST VESSEL: The assay was performed in seamless glass,
30.5-cm cuboidal, Pyrex chromatographic jars to which 20
liters of test solution was added. The test organisms were
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