Registration Dossier
Registration Dossier
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EC number: 274-972-1 | CAS number: 70879-65-1
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
The lethal concentraion (LC50) for 2-Naphthalenol, 1-[[4-(phenylazo)phenyl]azo]-, ar',ar''-Me derivs for Pimephales promelas at 96 hours is estimated to be 126.94 mg/L. based on this value it can be concluded that 2-Naphthalenol, 1-[[4-(phenylazo)phenyl]azo]-, ar',ar''-Me derivs is not toxic to aquatic environment based the criteria given by CLP regulation.
Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Effect concentration:
- 126.94 mg/L
Additional information
Toxicity to fish-
Based on the predicted data of target substance 2-Naphthalenol, 1-[[4-(phenylazo)phenyl]azo]-, ar',ar''-Me derivs. reviewed for short term toxicity to fish from reliable sources having Klimisch rating 2 and 4 considering the weight of evidence approach.
The summary of the results are presented below-
Sr.No |
Endpoint |
Effect values |
Basis for effects |
Duration |
Species |
Remarks |
1. |
LC50 |
126.9463mg/L |
Mortality |
96 hrs |
Pimephales promelas |
Predicted data |
2. |
LC50 |
106.9048 mg/L |
Mortality |
48 hrs |
Pimephales promelas |
Predicted data |
3. |
LC50 |
>100 mg/L |
Mortality |
48 hrs |
Oryzias latipes |
RA-85-83-6(MITI Database) |
Based on the results summarized in above table for target substance 2-Naphthalenol, 1-[[4-(phenylazo)phenyl]azo]-, ar',ar''-Me derivs. the LC50 value is greater than 100 mg/L. Thus considering the value from CLP Criteria for aquatic classification of the substance, it is concluded that the test substance does not exhibits short term toxicity to fish.
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