Registration Dossier
Registration Dossier
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EC number: 202-046-9 | CAS number: 91-17-8
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
A 48-h acute fish test was conducted by Chemicals Inspection and Testing Institute (1992) wih Oryzias latipes (unclear if static or semistatic). 10 fish per replicate/level were tested in 4 L glass containers (concentration range unknown). A second acute fish test (48 h) conducted by Hüls Infracor GmbH (1998) studied the short-term effects of decahydronaphthalene on Leucisus idus, according to the DIN 38412 - part 15 method. Nominal concentrations: 2.5, 3.0, 4.0, 5.0, 6.0, 8.0 mg/l. The LC50 (48h) was found in a similar range (4.3 mg/l).
Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Effect concentration:
- 1.84 mg/L
Marine water fish
Marine water fish
- Effect concentration:
- 1.84 mg/L
Additional information
The study of Chemicals Inspection and Testing Institute (1992) was conducted according to Japanese national standards and was found to have valid LC50 1.84 mg of decahydronapthalene/L. Although the documentation is incomplete the study can be considered as "reliable with restrictions". The LC50 of 1.84 mg/L is supported by an additional acute fish study (Hüls Infracor GmbH 1998) where the 48 h LC50 was found in a similar range (4.3 mg/L). The available studies indicate that decahydronapthalene concentration of 4.3 mg/L is not toxic to fish. Taking into consideration the information about the national standards of Chemicals Inspection and Testing Institute, the endpoint which should be used for the risk assessment is 1.84 mg/L.
The results are summarised in the following table:
| Species | Endpoint (exposure duration) | Exposure concentration | Reference |
| Oryzias latipes | LC50(48 h) | 1.84 mg/L | CITI - Chemicals Inspection and Testing Institute (1992) |
| Leuciscus idus | LC50(48 h) | 4.3 mg/L | Hüls Infracor GmbH (1998) |
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