Sodium 1,4-bis(1,3-dimethylbutyl) sulphonatosuccinate

Skin sensitisation

Administrative data

Endpoint:

skin sensitisation: in vivo (non-LLNA)

Remarks:

in vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1976

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: The test method deviates from the current LLNA standard method, but was conducted according to standards at the time of conduct. The study is therefore considered adequate, relevant and reliable.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1976

Report date:

1976

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: Modified Draize-Shelanski Repeat Insult Patch test

Deviations:

no

Principles of method if other than guideline:

Human predictive skin sensitisation tests have been in use the last 50 years. They have been used more widely in the United States than in Europe. Sensitisation potential has been investigated, and the development of animal sensitisation tests was partly based on comparison to human tests performed with the same chemicals. Further, human testing has the advantage that extrapolation of the test results from one species to another is avoided. There are a number of different human sensitisation tests available.(http://ec.europa.eu/health/scientific_committees/consumer_safety/opinions/sccnfp_opinions_97_04/sccp_out102_en.htm))

GLP compliance:

no

Type of study:

other: Modified Draize-Shelanski Repeat Insult Patch Test

Justification for non-LLNA method:

The Modified Draize-Shelanski Patch test was historically present for the registered substance and was considered most relevant and valid.

Test material

Test material information

Constituent 1

Reference substance name:

Sodium 1,4-bis(1,3-dimethylbutyl) sulphonatosuccinate

EC Number:

219-147-9

EC Name:

Sodium 1,4-bis(1,3-dimethylbutyl) sulphonatosuccinate

Cas Number:

2373-38-8

Molecular formula:

C16H30O7S.Na

IUPAC Name:

sodium 1,4-bis[(4-methylpentan-2-yl)oxy]-1,4-dioxobutane-2-sulfonate

Test material form:

other: waxy solid

Details on test material:

- Name of test material (as cited in study report): Aerosol MA, sodium dihexylsulfosuccinate
- Physical state: Waxy solid
- Analytical purity: >96%
- Impurities (identity and concentrations): See confidential details
- Composition of test material, percentage of components: See confidential details
- Purity test date: Not provided
- Lot/batch No.: S-11700-75-C
- Expiration date of the lot/batch: Not provided
- Stability under test conditions: Not provided
- Storage condition of test material: Not provided

In vivo test system

Test animals

Species:

human

Strain:

other: not applicable

Sex:

male/female

Details on test animals and environmental conditions:

Not applicable

Study design: in vivo (non-LLNA)

Induction

Induction 1

Route:

epicutaneous, occlusive

Vehicle:

petrolatum

Induction 2

Concentration / amount:

Induction 2.5 % in petrolatum
Challenge 1% in petrolatum

Challenge

Challenge 1

Route:

epicutaneous, occlusive

Vehicle:

petrolatum

Challenge 2

Concentration / amount:

Induction 2.5 % in petrolatum
Challenge 1% in petrolatum

No. of animals per dose:

100 humans

Details on study design:

MAIN STUDY
A. INDUCTION EXPOSURE
- No. of exposures: 100
- Exposure period: 24 hours
- Test groups: 1 test group of 100 humans
- Control group: no
- Site: patch sites on the back or volar forearms
- Frequency of applications: 10
- Duration: 10 alternate days
- Concentrations: 2.5% in petrolatum

B. CHALLENGE EXPOSURE
- No. of exposures: 100
- Day(s) of challenge: 1
- Exposure period: 24 hours
- Test groups: humans , 1 test group
- Control group: no
- Site: back or volar forearms, fresh sites
- Concentrations: 1% in petrolatum
- Evaluation (hr after challenge):24h and 48 hours

Results and discussion

In vivo (non-LLNA)

Results

Results 1

Reading:

1st reading

Hours after challenge:

24

Group:

test chemical

Dose level:

1% in petrolatum

No. with + reactions:

0

Total no. in group:

100

Remarks on result:

other: Reading: 1st reading. Hours after challenge: 24.0. Group: test group. Dose level: 1% in petrolatum. No with. + reactions: 0.0. Total no. in groups: 100.0.

Results 2

Reading:

2nd reading

Hours after challenge:

48

Group:

test chemical

Dose level:

1% in petrolatum

No. with + reactions:

0

Total no. in group:

100

Remarks on result:

other: Reading: 2nd reading. Hours after challenge: 48.0. Group: test group. Dose level: 1% in petrolatum. No with. + reactions: 0.0. Total no. in groups: 100.0.

Results 3

Reading:

1st reading

Hours after challenge:

24

Group:

negative control

Remarks on result:

not measured/tested

Results 4

Reading:

2nd reading

Hours after challenge:

48

Group:

negative control

Remarks on result:

not measured/tested

Results 5

Reading:

1st reading

Group:

positive control

Remarks on result:

not measured/tested

Results 6

Reading:

2nd reading

Hours after challenge:

48

Group:

positive control

Remarks on result:

not measured/tested

Applicant's summary and conclusion

Interpretation of results:

not sensitising

Remarks:

Migrated information Criteria used for interpretation of results: expert judgment

Conclusions:

There were no instances of irritation or sensitisation from this test item on the Draize-Shelanski Test.
It is unlikely that this test item would present a danger of irritation or sensitisation in normal, intended use.

Executive summary:

Modified Draize-Shelanski Repeat Insult Patch Test:

Approximately 300 mg of the test item, containing >96% active ingredient, was applied to patch sites on the backs or volar forearms of 100 subjects for ten alternate-day 24 hour periods under occlusion.

Following a seven-day rest period, challenge patches of the test item were applied in the same manner to fresh sites on the backs or volar forearms of all 100 subjects for 24 hours. Challenge sites were read on removal of the patch and 24 hours thereafter.

There were no instances of irritation or sensitisation from this test item on the Draize-Shelanski Test.

It is unlikely that this material would present a danger of irritation or sensitisation in normal, intended use.