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EC number: 204-340-2
CAS number: 119-64-2
48-h acute toxicity of tetrahydronaphthalene to Daphnia pulex was
studied under static conditions according to U.S. standard methods.
Daphnids were exposed to the test item at five concentration levels for
48 h. Immobilisation was observed. The following endpoint was derived:
2.412 mg/L (SE.:
+/- 0.9184 mg/L)
study is classified as "reliable with restrictions".
48-h acute toxicity of tetrahydronaphthalene to Daphnia magna was
studied under static conditions by Scholz, N. (1994) according to EU
method C.2.. Daphnids were exposed to the test item at six concentration
levels ranging from 1.0 to 14.0 mg/l for 48 h. Immobilisation was
observed. The following endpoint was derived:.
9.5 mg/L (95%
C.L.: 7.9 to 14.0 mg/L)
study is classified as "reliable without restrictions".
The acute toxicity of the test item to Daphnia magna was determined in a static test (Scholz, 1994) conducted according to accepted guidelines (Directive 92/69/ECC, C.2). The EC50 (48h) calculated was 9.5 mg/L (based on nominal concentrations). The acute toxicity of Tetrahydronaphthalene was also studied on Daphnia pulex in a static test (Smith et al., 1988) according to U.S. national guidelines. The EC50 (48h) was estimated to be 2.412 mg/L.The acute effects of Tetrahydroanphthalene were also studied on the marine Brine shrimp (Price et al., 1974) in a 24 h static study. The results of such study indicates that the EC50 (24 h) was 78 mg/L.
There are two studies with freshwater invertebrates available. Daphnia pulex was observed to be more susceptible to tetrahydronaphthalene than Daphnia magna and will be therefore considered for risk assessment purposes. There is also one study with marine water invertebrates investigating the effects of tetrahydronaphthalene on Artemia salina (brine shrimp).
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