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Ecotoxicological information

Toxicity to terrestrial plants

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Administrative data

Endpoint:
toxicity to terrestrial plants: long-term
Type of information:
read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Justification for type of information:
The justification for the read across category approach is included in IU section 13.

Data source

Materials and methods

GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Benzenesulfonic acid, 4-C20-24 (even numbered) sec-alkyl derivs.
EC Number:
701-015-1
Cas Number:
2156592-72-0
Molecular formula:
C9H12SO3(CH2)n n=17-21
IUPAC Name:
Benzenesulfonic acid, 4-C20-24 (even numbered) sec-alkyl derivs.
Test material form:
other: liquid
Details on test material:
The test substance is a brown viscous liquid with sulfurous odor.

Test organisms

Details on test organisms:
-

Results and discussion

Effect concentrationsopen allclose all
Species:
Sorghum bicolor
Duration:
21 d
Dose descriptor:
EC10
Effect conc.:
68 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
act. ingr.
Basis for effect:
growth
Species:
Helianthus annuus
Duration:
21 d
Dose descriptor:
EC10
Effect conc.:
116 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
act. ingr.
Basis for effect:
growth
Species:
Phaseolus aureus
Duration:
21 d
Dose descriptor:
EC10
Effect conc.:
126 mg/kg soil dw
Nominal / measured:
meas. (initial)
Conc. based on:
act. ingr.
Basis for effect:
growth
Species:
other: all 3
Duration:
21 d
Dose descriptor:
NOEC
Effect conc.:
100 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
act. ingr.
Basis for effect:
growth
Species:
Sorghum bicolor
Duration:
21 d
Dose descriptor:
EC50
Effect conc.:
167 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
act. ingr.
Basis for effect:
growth
Species:
Helianthus annuus
Duration:
21 d
Dose descriptor:
EC50
Effect conc.:
289 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
act. ingr.
Basis for effect:
growth
Species:
Phaseolus aureus
Duration:
21 d
Dose descriptor:
EC50
Effect conc.:
316 mg/kg soil dw
Nominal / measured:
meas. (initial)
Conc. based on:
act. ingr.
Basis for effect:
growth

Applicant's summary and conclusion

Conclusions:
The toxicity of the test substance to three species of plant, sunflower, sorghum, and mung bean, was determined. Seeds of these three species were grown in soil containing concentrations of the test ingredient of 0, 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. 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.

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