1,2,3,4-tetrahydronaphthalene

Short-term toxicity to aquatic invertebrates

Description of key information

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.

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:

2.4 mg/L

EC50/LC50 for marine water invertebrates:

78 mg/L

Additional information

There are two studies with freshwater invertebrates available. Daphnia pulex was observed to be more susceptible to tetrahydronaphthalene than Daphnia magna and willl 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).