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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Toxicological information

Acute Toxicity: oral

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Administrative data

Endpoint:
acute toxicity: oral
Type of information:
read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
Study conducted according to OECD Guidelines and to GLP, but not fully reported. However as this study is used in the context of a read across, Klimisch 2 is assigned.
Justification for type of information:
REPORTING FORMAT FOR THE CATEGORY APPROACH
1. HYPOTHESIS FOR THE CATEGORY APPROACH
The read across follows Scenario 5 - Qualitatively and quantitatively similar effects are caused by a common compound, which is formed from all category members (as described in the 2017 Read-Across Assessment Framework document).
2. SOURCE AND TARGET CHEMICAL(S) (INCLUDING INFORMATION ON PURITY AND IMPURITIES)
TARGET: Benzene, tetrapropylene-, distn. residues, sulfonated, sodium salts
SOURCE: Sodium 4-icosylbenzenesulfonate
3. CATEGORY APPROACH JUSTIFICATION
Linear and non-linear or branched alkylbenzene sulfonates are anionic surfactants with molecules characterized by a hydrophobic (apolar) and a hydrophilic (polar) group. As a group of chemicals, they are generally mixtures of closely related isomers and homologues. Each molecule contains an aromatic ring sulfonated at the para position and attached to either a linear or a branched alkyl chain at any position except the terminal carbons. The sulfonate group is a common functional group present in each of the category members, and is expected to exhibit similar biological activities with little influence from the length of carbon chain. The cation components of the chemicals (e.g. calcium, magnesium, sodium, or barium) are not expected to contribute significantly to the toxicity.
4. DATA MATRIX
See Read Across document attached to CSR

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1989

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 401 (Acute Oral Toxicity)
Deviations:
no
GLP compliance:
yes
Test type:
standard acute method
Limit test:
yes

Test material

Constituent 1
Reference substance name:
analog of 70024-69-0
IUPAC Name:
analog of 70024-69-0
Constituent 2
Reference substance name:
analog of 274-263-7
IUPAC Name:
analog of 274-263-7
Constituent 3
Chemical structure
Reference substance name:
Benzenesulfonic acid, mono-C16-24-alkyl derivs., calcium salts
EC Number:
274-263-7
EC Name:
Benzenesulfonic acid, mono-C16-24-alkyl derivs., calcium salts
Cas Number:
70024-69-0
Molecular formula:
C52H90CaO6S2
IUPAC Name:
calcium;4-icosan-3-ylbenzenesulfonate
Details on test material:
Test material dosed as received, purity not provided.

Test animals

Species:
rat
Strain:
Sprague-Dawley
Sex:
male/female
Details on test animals or test system and environmental conditions:
None provided in study report.

Administration / exposure

Route of administration:
oral: gavage
Vehicle:
unchanged (no vehicle)
Details on oral exposure:
MAXIMUM DOSE VOLUME APPLIED: 5000 mg/kg bw
Doses:
5000 mg/kg bw
No. of animals per sex per dose:
5
Control animals:
yes
Details on study design:
Animals were observed for 14 days following administration of the test substance.
Bodyweights were recorded on the day of dosing and at 2, 7 and 14 days after dosing.

Necropsy of survivors performed: yes

Clinical signs were observed and bodyweights measured.
Statistics:
No mortality occurred. Use of statistics not indicated.

Results and discussion

Effect levels
Key result
Sex:
male/female
Dose descriptor:
LD50
Effect level:
> 5 000
Remarks on result:
other: 95% CL not indicated. LD50 is greater than 5000 mg/kg bw.
Mortality:
Mortality did not occur in treated animals.
Clinical signs:
Diarrhoea and reduced food intake were observed in one treated female on day one of dosing.
Body weight:
No significant change in bodyweights occurred in treated animals.
Gross pathology:
No treatment related effects were observed on necropsy.

Any other information on results incl. tables

Table 2: Number of animals dead [and with evident toxicity] [and time range within which mortality occurred]

 

Dose
(mg/kg bw)

Mortality (# dead/total)

Time range of deaths (hours)

Number with evident toxicity (#/total)

Male

Female

Combined

Male

Female

Combined

Control

 0/5

0/5 

0/10

 

0/5

0/5 

0/10

5000

 0/5

0/5

0/10

 

0/5

1/5

0/10

Applicant's summary and conclusion

Interpretation of results:
Toxicity Category IV
Remarks:
Migrated information Criteria used for interpretation of results: EU
Conclusions:
Mortality did not occur at doses of 5000 mg/kg bw, therefore, and LD50 was not determined.
Executive summary:

In an acute oral toxicity study, groups of Sprague-Dawley rats (5/sex) were given a single oral dose of sodium 4-icosylbenzenesulfonate at doses of  0 or 5000  mg/kg bw and observed for 14 days.

 

No mortality occurred in this limit test, therefore an LD50 has not been determined.

This acute oral study is classified as acceptable. It satisfies the guideline requirement for an acute oral study OECD 401 in the rat.