Registration Dossier

Diss Factsheets

Ecotoxicological information

Toxicity to soil macroorganisms except arthropods

Administrative data

toxicity to soil macroorganisms except arthropods: short-term
Type of information:
experimental study planned
Study period:
Study in progress
Justification for type of information:
Long term toxicity data only became available for Fish at the end of July 2018. As such, it was determined that the PNEC aquatic was very low. In the absence of terrestrial data, the soil PNEC is derived using the equilibrium partitioning method which is based on the PNEC aquatic. However, in accordance with Table R.7.11-2 of Chapter R.7c – Endpoint Specific Guidance, the substance meets the specification of Hazard Category 2. It is considered by the registrant that the soil PNEC derived using the PNEC aquatic is very low, and requires refinement in order to adequately assess the risk to the soil compartment. The registrant therefore intends to conduct a confirmatory short term soil toxicity test in order to further refine the risk and re-evaluate the PNEC.

Data source

Materials and methods

Test guideline
according to guideline
OECD Guideline 207 (Earthworm, Acute Toxicity Tests)
not applicable

Test material

Test material form:
solid: particulate/powder
Details on test material:
Test substance: 206774/A (formerly known as 202199)
Identification: Lowinox® AH25
Appearance: White to cream coloured powder
Batch: WAH4L0016/WAH8E0007
Purity/Composition: 95.1%/95.88%
Test substance storage: At room temperature
Stable under storage conditions until: 09 November 2018 (retest date)/07 May 2022 (retest date)
Purity/composition correction factor: No correction factor required
Test substance handling: No specific handling conditions required
Stability at higher temperatures: Not indicated
Chemical name (IUPAC), synonym or trade name: 2,5-di-tert-pentylhydroquinone
CAS Number: 79-74-3
Molecular formula: C16H26O2
Molecular weight: 250.38
Highly reactive to water: Not indicated
Highly reactive to oxygen: Not indicated
Volatile: Not indicated

Vehicle information
Solubility in water: 1 g/L at 20°C
Stability in water: Not indicated

Results and discussion

Applicant's summary and conclusion

Categories Display