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Ecotoxicological information

Toxicity to terrestrial plants

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Reference
Endpoint:
toxicity to terrestrial plants: short-term
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Justification for type of information:
Please see Read-Across Justification document
Reason / purpose:
read-across source
Key result
Species:
Triticum aestivum
Duration:
18 d
Dose descriptor:
LC50
Effect conc.:
> 100 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
seedling emergence
Key result
Species:
Triticum aestivum
Duration:
18 d
Dose descriptor:
EC50
Effect conc.:
> 100 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth
Key result
Species:
Brassica alba
Duration:
18 d
Dose descriptor:
LC50
Effect conc.:
> 100 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
seedling emergence
Key result
Species:
Brassica alba
Duration:
18 d
Dose descriptor:
EC50
Effect conc.:
> 100 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth
Key result
Species:
Lepidum sativum
Duration:
18 d
Dose descriptor:
LC50
Effect conc.:
> 100 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
seedling emergence
Key result
Species:
Lepidum sativum
Duration:
18 d
Dose descriptor:
EC50
Effect conc.:
> 100 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth
Executive summary:

All tested species showed no phytotoxic effects at the tested limit concentration (100 mg/kg) of the analogue substance 1,2,4-Benzenetricarboxylic acid, mixed decyl and octyl triesters compared to the control. The LC50 for seedling emergence and the EC50 for growth of Triticum aestivum, Lepidium sativum and Brassica alba were therefore observed to be greater than 100 mg/kg dry soil.

Based on the structural similarity and the observations made in the aquatic toxcicity studies, it can be concluded that Esterification products of Guerbet alcohols, C24-26, branched and cyclic with benzene-1,2,4-tricarboxylic acid 1,2-anhydride will also not exhibit toxic effects in terrestrial plants at this concentration.

Description of key information

Based on the available information for the analogue substance and the observations made in the aquatic toxcicity studies, it can be concluded that Esterification products of Guerbet alcohols, C24-26, branched and cyclic with benzene-1,2,4-tricarboxylic acid 1,2-anhydride will also not exhibit toxic effects in terrestrial plants up to 100 mg/kg soil dw.

Key value for chemical safety assessment

Additional information

The analogue substance 1,2,4-Benzenetricarboxylic acid, mixed decyl and octyl triesters was tested on effects of seedling emergence and seedling growth on three non-target plant species representing three plant families according to OECD Guideline for Testing of Chemicals No. 208. For the test the following plant species were selected: wheat (Triticum aestivum) for Category 1, mustard (Brassica alba) for Category 2 and cress (Lepidium sativum) for Category 3. A control and one limit concentration of 100 mg/kg dry soil (nominal) were tested for each species. For the limit concentration the test substance was mixed with silica sand and then incorporated into soil in which the seeds were sown. The number of seedlings that emerged were recorded. After 17 days in the test with Brassica alba resp. 18 days in the test with Triticum aestivum and Lepidium sativum the plants were harvested and weighed.

All tested species showed no phytotoxic effects at the tested concentration compared to the control. The LC50 for seedling emergence and the EC50 for growth of Triticum aestivum, Lepidium sativum and Brassica alba were therefore observed to be greater than 100 mg/kg dry soil.

Based on the structural similarity and the observations made in the aquatic toxcicity studies, it can be concluded that Esterification products of Guerbet alcohols, C24-26, branched and cyclic with benzene-1,2,4-tricarboxylic acid 1,2-anhydride will also not exhibit toxic effects in terrestrial plants at this concentration.