Registration Dossier

Ecotoxicological information

Short-term toxicity to aquatic invertebrates

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
short-term toxicity to aquatic invertebrates
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Data is from computational model developed by USEPA
Justification for type of information:
Data is from computational model developed by USEPA
Qualifier:
according to
Guideline:
other: Modeling database
Principles of method if other than guideline:
ECOSAR estimates log Kow values using the US EPA's KOWWIN Program for aquatic toxicity.Toxicity of a chemical was measured on the basis of similarity of structure to chemicals for which the aquatic toxicity has been previously measured by structure-activity relationships (SARs) program based upon the octanol /water partition coefficient (Kow). Data from ECOSAR class,neutral organics was used.

The estimation methods in EPI Suite™ have been developed by government, academic, and private sector researchers over many years and represent some of the best techniques currently available. The intended application domain of EPI Suite is organic chemicals, and inorganic as well as organometallic chemicals generally can be considered outside the domain.
GLP compliance:
no
Specific details on test material used for the study:
- Name of test material (IUPAC name): (2S)-1,3,4,5,6,7-hexahydro-1,1,5,5-tetramethyl-2H-2,4a-methanonaphthalene
- IUPAC name: (2S)-1,3,4,5,6,7-hexahydro-1,1,5,5-tetramethyl-2H-2,4a-methanonaphthalene
- Moleuclar formula: C15H24
- Molecular weight: 204.3546 g/mol
- Substance type: Organic
- Smiles: CC1(C)CCC=C2C(C)(C)[C@H]3CC[C@@]12C3
- Inchi: 1S/C15H24/c1-13(2)8-5-6-12-14(3,4)11-7-9-15(12,13)10-11/h6,11H,5,7-10H2,1-4H3/t11-,15-/m0/s1
- Physical state: liquid
Analytical monitoring:
not required
Vehicle:
not specified
Test organisms (species):
Daphnia magna
Test type:
not specified
Water media type:
not specified
Total exposure duration:
48 h
Duration:
48 h
Dose descriptor:
LC50
Effect conc.:
0.055 mg/L
Nominal / measured:
estimated
Conc. based on:
test mat.
Basis for effect:
not specified
Remarks on result:
other: Neutral Organics
Validity criteria fulfilled:
not specified
Conclusions:
On the basis of EPI suite, ECOSAR version 1.1, the LC 50 value for short term toxicity to aquatic invertebrates was predicted to be 0.055 mg/l for test material in 48 hrs.
Based on this value it can be concluded that the substance is considered to be toxic to aquatic environment and can be classified in aquatic acute 1 category as per the criteria mentioned in CLP regulation.
Executive summary:

Based on the prediction done by EPI suite, ECOSAR version 1.1, on the basis of similarity of structure to chemicals for which the aquatic toxicity has been previously measured by structure-activity relationships (SARs) program, the LC 50 value for short term toxicity to aquatic invertebrates was predicted.

On the basis of this program, the LC 50 value for short term toxicity to aquatic invertebrates was predicted to be 0.055 mg/l for test material in 48 hrs.

Based on this value it can be concluded that the substance is considered to be toxic to aquatic environment and can be classified in aquatic acute 1 category as per the criteria mentioned in CLP regulation.

Description of key information

Toxicity to aquatic invertebrate:

Based on the prediction done by EPI suite, ECOSAR version 1.1, on the basis of similarity of structure to chemicals for which the aquatic toxicity has been previously measured by structure-activity relationships (SARs) program, the LC 50 value for short term toxicity to aquatic invertebrates was predicted.

On the basis of this program, the LC 50 value for short term toxicity to aquatic invertebrates was predicted to be0.055mg/l for test materialin 48 hrs.

Based on this value it can be concluded that the substance is considered to be toxic to aquatic environment and can be classified in aquatic acute 1 category as per the criteria mentioned in CLP regulation.

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
0.55 mg/L

Additional information

Toxicity to aquatic invertebrate:

Based on the prediction done by EPI suite, ECOSAR version 1.1, on the basis of similarity of structure to chemicals for which the aquatic toxicity has been previously measured by structure-activity relationships (SARs) program, the LC 50 value for short term toxicity to aquatic invertebrates was predicted.

On the basis of this program, the LC 50 value for short term toxicity to aquatic invertebrates was predicted to be0.055mg/l for test materialin 48 hrs.

Based on this value it can be concluded that the substance is considered to be toxic to aquatic environment and can be classified in aquatic acute 1 category as per the criteria mentioned in CLP regulation.

The above predicition was supported by the data from authorative databases

1)To study the effects of test material on aquatic invertebrate test was carried for 48 H under static condition. Increasing trend of Intoxication (immobile) was measured during the test.Effective concentration EC50 to 50% of Daphnia pulex when exposed to test material for 48 h is 0.044 mg/L. It can be concluded from the EC50 Intoxication value that the test material is toxic to the aquatic invertebrateand can be considered as “Aquatic acute 1” as per the classification criteria for aquatic environment.

2)To study the effects of [1S-(1α,3aβ,4α,8aβ)]-decahydro-4,8,8-trimethyl-9-methylene-1,4-methanoazulene on aquatic invertebrate test was carried for 48 H under static condition. Increasing trend of Intoxication (immobile) was measured during the test.

Effective concentration EC50 to 50% of Daphnia pulex when exposed to 1S-(1α,3aβ,4α,8aβ)]-decahydro-4,8,8-trimethyl-9-methylene-1,4-methanoazulene for 48 h is 0.08 mg/L. It can be concluded from the EC50 Intoxication value that the 1S-(1α,3aβ,4α,8aβ)]-decahydro-4,8,8-trimethyl-9-methylene-1,4-methanoazulene is toxic to the aquatic invertebrateand can be considered as “Aquatic acute 1” as per the classification criteria for aquatic environment.