Benzenesulfonic acid, mono-C10-13-alkyl derivs., compds. with diethanolamine

Toxicity to terrestrial plants

Description of key information

There is no experimental data available for the test item. Alternatively, a read-across approach is applied. The following values were obtained for the respective source substance:

EC10 = 52 mg LAS Na/kg dry weight ( Nigella arvensis)

EC50 = 90 mg LAS Na/kg dry weight ( Galinsoga parviflora)

Key value for chemical safety assessment

Short-term EC50 or LC50 for terrestrial plants:

90 mg/kg soil dw

Long-term EC10, LC10 or NOEC for terrestrial plants:

52 mg/kg soil dw

Additional information

No experimental data on toxicity is available for the test item. Alternatively, experimental data for one source substances is available and a read-across approach is applied. Please refer to read-across justification document attached in IUCLID Section 13. For further supporting information please refer to respective REACH registration dossier of each source substance.

 

Source substance 2 (LAS NA, CAS 68411-30-3)

In a 21 week long-term toxicity test to terrestrial plants, monocots (Sorghum bicolor) and dicots (Helianthus annuus, Phaseolus aureus) were exposed to Benzenesulfonic acid (C10-13-alkyl derivs., sodium salts, CAS 68411-30-3) in a laboratory study with artificial soil. Nominal test concentrations were 1, 10, 100, 1000 mg/kg active ingredient in dry soil. The emergence and growth of seedlings was monitored for 21 days. There was a decrease in emergence of all three species at the highest concentration, with some shoots barely emerging, and stunted and dying. The NOEC for all three species is 100 mg/kg AI. The 21-day EC50 for sunflower was 289 mg/kg AI, for sorghum it was 167 mg/kg AI, and for mung bean it was 316 mg/kg AI. This test is according to the OECD Guideline 208.

 

In a 14 day short-term toxicity test to terrestrial plants, monocots (Avena sativa) and dicots (Brassica rapa, Sinapis alba) were exposed to Benzenesulfonic acid (C10-13-alkyl derivs., sodium salts, CAS 68411-30-3) in a laboratory study. Nominal test concentrations were 0 - 10,000 mg/kg soil. The seedlings were grown for 14 days, and then weighed. The weight was compared to weights of controls plants. All three species showed a dose-related reduction in growth. The EC10 for B. rapa was 86 mg/kg dw soil, for A. sativa it was 80 mg/kg dw soil, and for S. alba it was 200 mg/kg dw soil. This toxicity study is classified as acceptable, as it is well documented and meets generally accepted scientific principles.

In a 14 day short-term vegetative vigour test to terrestrial plants, dicots (Malva pusilla, Solanum nigrum, Chenopodium album, Amaranthus retroflexus, Nigella arvensis, Galinsoga parviflora and Brassica rapa) were exposed to Benzenesulfonic acid (C10-13-alkyl derivs., sodium salts, CAS 68411-30-3) in a laboratory study with artificial soil. Nominal test concentrations were 1, 10, 100 and 1000 mg/kg dw. The following EC50s based on growth and nominal concentrations were found: Malva pusilla 204 mg/kg dw, Solanum nigrum 169 mg/kg dw, Chenopodium album 164 mg/kg dw, Amaranthus retroflexus 142 mg/kg dw, Nigella arvensis 133 mg/kg dw, Galinsoga parviflora 90 mg/kg dw, and Brassica rapa 164 mg/kg dw. The following EC10s were found: Malva pusilla 110 mg/kg dw, Solanum nigrum 120 mg/kg dw, Chenopodium album 120 mg/kg dw, Amaranthus retroflexus 110 mg/kg dw, Nigella arvensis 52 mg/kg dw, Galinsoga parviflora 55 mg/kg dw, and Brassica rapa 86 mg/kg dw. This test is according to the OECD Guideline 208.