Registration Dossier

Diss Factsheets

Ecotoxicological information

Toxicity to terrestrial plants

Currently viewing:

Administrative data

Endpoint:
toxicity to terrestrial plants: short-term
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Well-documented study.
Justification for type of information:
Category Approach; test material is reference substance LAS. LAS provides suitable read across for LAB Sulfonic Acids as both form the identical chemical species in aqueous solutions at neutral (environmental) pH, namely, the LAS ion (C10-13 linear alkyl benzene-SO3-) and would be expected to have similar ecotoxicological properties.

Data source

Referenceopen allclose all

Reference Type:
publication
Title:
Phytotoxicity of surfactants to higher plants.
Author:
Gunther, P, and Pestemer, W
Year:
1992
Bibliographic source:
Hall, JE, Sauerbeck, DE, Hermite, PL (Eds.), Effects of Organic Contaminants in Sewage Sludge on Soil Fertility, Plants, and Animals. Office for Official Publications of the European Communities, Brussels, Belguim, pp. 103-111.
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Three species of crop plant B. rapa, A. sativa, and S. alba, were grown in soil containing concentrations of LAS that varied from 0 -10,000 mg/kg dw soil. The seedlings were grown for 14 days, and then weighed. The weight was compared to weights of controls plants.
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Benzenesulfonic acid, C10-13-alkyl derivs., sodium salts
EC Number:
270-115-0
EC Name:
Benzenesulfonic acid, C10-13-alkyl derivs., sodium salts
Cas Number:
68411-30-3
Molecular formula:
Not applicable for UVCB
IUPAC Name:
sodium 4-undecylbenzenesulfonate
Details on test material:
- Name of test material (as cited in study report): LAS

Sampling and analysis

Analytical monitoring:
not specified

Test organisms

open allclose all
Species:
Avena sativa
Plant group:
Monocotyledonae (monocots)
Details on test organisms:
- Common name: oats
Species:
Brassica rapa
Plant group:
Dicotyledonae (dicots)
Details on test organisms:
- Common name: turnip
Species:
Sinapis alba
Plant group:
Dicotyledonae (dicots)
Details on test organisms:
- Common name: mustard

Study design

Test type:
early seedling growth toxicity test
Study type:
laboratory study
Substrate type:
other: soil, not specified
Total exposure duration:
14 d

Test conditions

pH:
6.1
Moisture:
23.2 g/100 g soil
Details on test conditions:
TEST SYSTEM
- Test container (type, material, size): self-watering pots
- Amount of soil: 70 g

SOURCE AND PROPERTIES OF SUBSTRATE (if soil)
- Soil texture (if natural soil)
- % sand: 54.3
- % silt: 35.7
- % clay: 9.9
- Soil classification system: sandy loam soil
- Organic carbon (%): 1.3
- Maximum water holding capacity (in % dry weigth): 23.2 g/100 g soil


EFFECT PARAMETERS MEASURED (with observation intervals if applicable) : shoot fresh weight at 14 days
Nominal and measured concentrations:
9 concentrations from 0 - 10,000 mg/kg soil

Results and discussion

Effect concentrationsopen allclose all
Species:
Avena sativa
Duration:
14 d
Dose descriptor:
EC10
Effect conc.:
80 mg/kg soil dw
Nominal / measured:
nominal
Basis for effect:
growth
Species:
Brassica rapa
Duration:
14 d
Dose descriptor:
EC10
Effect conc.:
86 mg/kg soil dw
Nominal / measured:
nominal
Basis for effect:
growth
Species:
Sinapis alba
Duration:
14 d
Dose descriptor:
EC10
Effect conc.:
200 mg/kg soil dw
Nominal / measured:
nominal
Basis for effect:
growth
Species:
Avena sativa
Duration:
14 d
Dose descriptor:
EC50
Effect conc.:
300 mg/kg soil dw
Nominal / measured:
nominal
Basis for effect:
growth
Species:
Sinapis alba
Duration:
14 d
Dose descriptor:
EC50
Effect conc.:
300 mg/kg soil dw
Nominal / measured:
nominal
Basis for effect:
growth
Species:
Brassica rapa
Duration:
14 d
Dose descriptor:
EC50
Effect conc.:
1 641 mg/kg soil dw
Nominal / measured:
nominal
Basis for effect:
growth
Details on results:
There was a steep dose-response curve in all species.

Applicant's summary and conclusion

Conclusions:
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 soil.
Executive summary:

Three species of crop plant B. rapa, A. sativa, and S. alba, were grown in soil containing concentrations of LAS that varied from 0 -10,000 mg/kg dw 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.

Categories Display