Diisotridecyl adipate

Long-term toxicity to fish

Link to relevant study record(s)

Reference

Endpoint:

long-term toxicity to fish, other

Type of information:

(Q)SAR

Adequacy of study:

key study

Study period:

2021

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification

Justification for type of information:

1. SOFTWARE: Ecosar Application
2. MODEL: ECOSAR v2.0
3. SMILES OR OTHER IDENTIFIERS USED AS INPUT FOR THE MODEL: representative structure: CC(C)CCCCCCCCCCOC(=O)CCCCC(=O)OCCCCCCCCCCC(C)C; measured water solubility 0.0007 mg/L; measured log Kow 11.7
4. SCIENTIFIC VALIDITY OF THE (Q)SAR MODEL: see attached justification documents
5. APPLICABILITY DOMAIN: see attached justification documents
6. ADEQUACY OF THE RESULT: As indicated in the attached methodology document, in the development of the ECOSAR equations for neutral organics and classes with excess toxicity, the training sets generally include chemicals with log Kow values in the range of -3 to 8 and molecular weights less than 1000. However, the domain of the model is considered to be larger than the descriptor range of the training set of chemicals. Although the individual equations may not have been not built using chemicals with log Kow values greater than 5.0 (acute) and 8.0 (chronic), the model can still make accurate qualitative determination of potential toxicity under environmental conditions for chemicals outside the log Kow descriptor domain. As such, the prediction fits the purpose of classification and labelling and risk assessment.

Principles of method if other than guideline:

see fields 'Justification for type of information' and 'Attached justification'

GLP compliance:

no

Total exposure duration:

33 d

Key result

Duration:

33 d

Dose descriptor:

NOEC

Nominal / measured:

estimated

Conc. based on:

test mat.

Basis for effect:

other: growth

Remarks on result:

other: no effects up to limit of solubility predicted

Conclusions:

No effects are estimated in saturated solutions even with long-term exposures.

Executive summary:

 Long-term aquatic toxicity was estimated using the ECOSAR model (applicability explained in the attached reports). No toxic effects are expected to occur in saturated solutions even with long-term exposures.  

This is consistent with toxicity test results for similar C-8 and C10 trimellitate compounds (tris-ethylhexyl trimellitate, EC #:222-020-0 and mixed decyl and octyl trimellitates , EC #:304-780-6) where no effects were observed at levels above solubility in standard long-term aquatic toxicity tests; as well as general literature for poorly soluble chemicals (Tolls et al. 2009).

 

Description of key information

No toxic effects are expected to occur in saturated solutions even with long-term exposures.