Benzenesulfonic acid, 4-C20-24 (even numbered) sec-alkyl derivs., sodium salts

Toxicity to terrestrial arthropods

Administrative data

Endpoint:

toxicity to terrestrial arthropods: long-term

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Well-documented, peer-reviewed publication.

Data source

Reference

Reference Type:

publication

Title:

Risk assessment of linear alkylbenzene sulphonates, LAS, in agricultural soil revisited: Robust chronic toxicity tests for Olsomia candida (Collembola), Aporrectodea caligninosa (Oligochaeta), and Enchytraeus (Enchytraeidae)

Author:

Krogh, PH, Lopez, CV, Cassani, G, Jensen, J, Holmstrup, M, Schraepen, N, Jorgensen, E, Gavor, Z, Temara, A

Year:

2007

Bibliographic source:

Chemosphere 69, 872-879.

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

ISO 11267 (Inhibition of Reproduction of Collembola by Soil Pollutants)

GLP compliance:

no

Application method:

soil

Test material

Test material information

Constituent 1

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

IUPAC Name:

sodium 4-undecylbenzenesulfonate

Test material form:

solid

Sampling and analysis

Analytical monitoring:

yes

Details on sampling:

Initial concentrations were measured.

Test substrate

Vehicle:

yes

Details on preparation and application of test substrate:

LABS Na was mixed in demineralized water, and then added to dry Askov soil. Fresh sludge (approx. 200 g) was freeze-dried. This was crushed and sieved through a 2 mm sieve. A methanol solution of LABS Na was then added to the sludge.

Test organisms

Test organisms (species):

Folsomia candida

Animal group:

Collembola (soil-dwelling springtail)

Details on test organisms:

TEST ORGANISM
- Source: permanent laboratory cultures
- Age at test initiation (mean and range, SD): 10-12 days

Study design

Study type:

laboratory study

Total exposure duration:

28 d

Test conditions

Details on test conditions:

TEST SYSTEM
- Amount of soil or substrate: 26 g soil mixed with 4 ml test solution
- No. of replicates per treatment group: 3

SOURCE AND PROPERTIES OF SUBSTRATE (if soil)
- Geographic location: Askov
- Soil texture (if natural soil)
- % sand: 76
- % silt: 12
- % clay: 11
- Soil classification system: sandy loam
- Organic carbon (%):1.3
- CEC: 13.4

Nominal and measured concentrations:

25-300 mg/kg soil

Results and discussion

Effect concentrations

Duration:

28 d

Dose descriptor:

EC10

Effect conc.:

205 mg/kg soil dw

Nominal / measured:

nominal

Basis for effect:

reproduction

Details on results:

Reproduction was not significantly affected, but an indicative EC10 was estimated at 205 mg/kg soil.

Applicant's summary and conclusion

Conclusions:

The EC10 for Folsomia candida based on reproduction was 205 mg/kg soil.

Executive summary:

Groups of F. candida were exposed to concentrations of 25-300 mg LABS Na/kg soil. Exposure lasted 28 days, after which adult survival and reproductive parameters were examined. The EC10 based on reproduction was 205 mg/kg soil.