Registration Dossier

Diss Factsheets

Administrative data

Endpoint:
toxicity to reproduction: other studies
Type of information:
(Q)SAR
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Reliable for the regulatory purpose for which the QSAR model was designed.

Data source

Reference
Reference Type:
other:
Title:
Comparative developmental toxicity QSAR model
Author:
MH Kung, JE Foreman
Year:
2019
Bibliographic source:
QMRF as reported to ECHA

Materials and methods

GLP compliance:
no
Type of method:
in vivo

Test material

Constituent 1
Chemical structure
Reference substance name:
Isoundecan-1-ol
EC Number:
257-376-6
EC Name:
Isoundecan-1-ol
Cas Number:
51750-47-1
Molecular formula:
C11H24O
IUPAC Name:
3,5 dimethyl nonanol-1

Results and discussion

Applicant's summary and conclusion

Conclusions:
The results of the exposure assessment throughout the lifecycle stage demonstrated that exposures were well below the DNELs (RCR range <0.01 to 0.252) for the registered conditions of use (i.e. for industrial populations). Uncertainty resulting from the omission of the information requirement was adequately addressed. The derived DNELs from the two models are shown in Table 1. The biological model was more conservative and relevant for exposure prediction compared to application of adjustment factors (AF) alone.

Table 1. Comparison of Derived DNELs for Workers Based on Use of Adjustment Factors or QSAR Model
DNEL (AF) DNEL (QSAR Model)
inhalation (mg/m3) 8.75 7.31
dermal (mg/kg/d) 99.3 41.5
oral (mg/kg/d) 9.93 4.15
RCR range <0.01 – 0.202 <0.01 to 0.252
Executive summary:

The Registrant determined that an exposure-driven approach may substitute for a PNDT study in a second species because there is sufficient developmental toxicity test data to conclude that the registered substance is not a developmental toxicant and importantly risk management measures and operational conditions are sufficient to demonstrate that there is no significant exposure during manufacturing and in all identified uses. Hence, there are sufficient grounds to adapt the information requirement according to the specific rules outlined in Annex XI 3.2 (a) of the REACH Regulation. The results of the exposure assessment throughout the lifecycle stage demonstrated that exposures were well below the DNELs (RCR range <0.01 to 0.252) for the registered conditions of use (i.e. for industrial populations).