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Description of key information

Key value for chemical safety assessment

Skin sensitisation

Link to relevant study records

Referenceopen allclose all

Endpoint:
skin sensitisation: in vivo (non-LLNA)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Please see Category Approach
Reason / purpose:
reference to same study
Reason / purpose:
reference to other study
Reason / purpose:
read-across source
Qualifier:
according to
Guideline:
OECD Guideline 406 (Skin Sensitisation)
Deviations:
yes
Remarks:
: Post-study body weights of animals are not mentioned.
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes
Type of study:
Buehler test
Justification for non-LLNA method:
The in vivo study data were obtained in studies performed before any in vitro sensitization tests tests had been validated and accepted for regulatory purposes.
Species:
guinea pig
Strain:
Dunkin-Hartley
Sex:
female
Details on test animals and environmental conditions:
TEST ANIMALS- Source: Hacking and Churchill Ltd.- Age at study initiation: Young females- Weight at study initiation: 599-853 gm- Housing: Caged in groups of two by dose group in grid floor propylene cages.- Diet (e.g. ad libitum): Guinea Pig diet, standard with vitamin C, Special diets Srvices Ltd., Witham, ad libitum- Water (e.g. ad libitum): ad libitum (A certificate for quality of drinking water was issued by the Yorkshire Water Authority)- Acclimation period: at least 7 daysENVIRONMENTAL CONDITIONS- Temperature (°C): 18-26 deg C- Humidity (%): 40-64%- Air changes (per hr): Not available- Photoperiod (hrs dark / hrs light): 12/12 (artificial light, 06.00 to 18.00)IN-LIFE DATES: From: 1983-06-01 To: 1983-07-01
Route:
epicutaneous, occlusive
Vehicle:
unchanged (no vehicle)
Concentration / amount:
One group of 20 test animals was treated with 0.4 ml of undiluted test material for an exposure period of 6 hours weekly for 3 induction exposures. Both test (20) and control (10) animals were challenged with 0.4 ml of undiluted test material.
Route:
epicutaneous, occlusive
Vehicle:
unchanged (no vehicle)
Concentration / amount:
One group of 20 test animals was treated with 0.4 ml of undiluted test material for an exposure period of 6 hours weekly for 3 induction exposures. Both test (20) and control (10) animals were challenged with 0.4 ml of undiluted test material.
No. of animals per dose:
Induction: group of 20 test animal treated with 0.4 ml of undiluted sodium cumene sulphonate.Range Finding test: 2 test animals were taken, for each of the following concentration- undiluted test material, 50%, 25% and 10% (v/v).Primary challenge: 10 control animals previously untreated were treated with undiluted test material.
Details on study design:
RANGE FINDING TESTS: 2 test animals were taken, for each of the following concentration- undiluted test material, 50%, 25% and 10% (v/v).MAIN STUDYA. INDUCTION EXPOSURE- No. of exposures: 3- Exposure period: 6 hours- Test groups: 0.4 ml of undiluted sodium cumene sulphonate.- Control group: None- Site: Shaved left flank of each animal.- Frequency of applications: once a week for 3 weeks- Duration: 6 hours, test substance was applied to the lint pads and were held in place with an overlapping impermeable occlusive tape and secured by elastic adhesive bandage.- Concentrations: undiluted sodium cumene sulphonate.B. CHALLENGE EXPOSURE- No. of exposures: One 6 hour exposure - Day(s) of challenge: 2 weeks after the last induction exposure- Exposure period: 6 hours under occlusion- Test groups: 0.4 ml of undiluted sodium cumene sulphonate.- Control group: 0.4 ml of undiluted sodium cumene sulphonate.- Site: freshly clipped Right flank that has not been treated before. - Concentrations: undiluted sodium cumene sulphonate.- Evaluation (hr after challenge): 21 and 45 hours after challenge exposure OTHER: None
Challenge controls:
10 control animals (previously unexposed) treated with 0.4 ml of undiluted sodium cumene sulphonate.
Positive control substance(s):
no
Positive control results:
Not applicable
Key result
Reading:
1st reading
Hours after challenge:
21
Group:
test group
Dose level:
0.4 ml of undiluted sodium cumene sulphonate
No. with + reactions:
0
Total no. in group:
20
Clinical observations:
No response
Remarks on result:
other: Reading: 1st reading. . Hours after challenge: 21.0. Group: test group. Dose level: 0.4 ml of undiluted sodium cumene sulphonate. No with. + reactions: 0.0. Total no. in groups: 20.0. Clinical observations: No response.
Reading:
1st reading
Hours after challenge:
21
Group:
negative control
Dose level:
0.4 ml of undiluted sodium cumene sulphonate.
No. with + reactions:
0
Total no. in group:
10
Clinical observations:
No response
Remarks on result:
other: Reading: 1st reading. . Hours after challenge: 21.0. Group: negative control. Dose level: 0.4 ml of undiluted sodium cumene sulphonate.. No with. + reactions: 0.0. Total no. in groups: 10.0. Clinical observations: No response.
Reading:
2nd reading
Hours after challenge:
45
Group:
test group
Dose level:
0.4 ml of undiluted sodium cumene sulphonate.
No. with + reactions:
0
Total no. in group:
20
Clinical observations:
No response
Remarks on result:
other: Reading: 2nd reading. . Hours after challenge: 45.0. Group: test group. Dose level: 0.4 ml of undiluted sodium cumene sulphonate.. No with. + reactions: 0.0. Total no. in groups: 20.0. Clinical observations: No response.
Reading:
2nd reading
Hours after challenge:
45
Group:
negative control
Dose level:
0.4 ml of undiluted sodium cumene sulphonate.
No. with + reactions:
0
Total no. in group:
10
Clinical observations:
No response
Remarks on result:
other: Reading: 2nd reading. . Hours after challenge: 45.0. Group: negative control. Dose level: 0.4 ml of undiluted sodium cumene sulphonate.. No with. + reactions: 0.0. Total no. in groups: 10.0. Clinical observations: No response.

none

Interpretation of results:
not sensitising
Remarks:
Migrated information
Conclusions:
Thus, undiluted sodium cumene sulphonate is not a skin sensitizer in guinea pigs.
Executive summary:

The sensitization potential of sodium cumene sulfonate was assessed in a study where one group of 20 test animals was treated with 0.4 ml of undiluted sodium cumene sulphonate for an exposure period of once weekly to 6 hours induction exposures for 3 weeks. After a 2 week rest period, both test (20) and control (10) animals were challenged with 0.4 ml of undiluted sodium cumene sulphonate.

On challenge with 0.4 ml of undiluted sodium cumene sulphonate, no reaction was observed in any of the test animals and conrtrol animals at both the 21 -hour and 45 -hour reading. No evidence for sensitization was observed in this study.

Endpoint:
skin sensitisation: in vitro
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:
Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (not sensitising)
Additional information:

There are a total of 4 skin sensitization studies on the hydrotrope category substances.

All studies gave negative responses for sensitization.

The in vivo study data were obtained in studies performed before any in vitro sensitization tests tests had been validated and accepted for regulatory purposes.


Migrated from Short description of key information:
There are 4 skin sensitisation studies for the hydrotrope category substances. The 4 studies consistently support a conclusion that these substances are "not sensitising".

Respiratory sensitisation

Endpoint conclusion
Endpoint conclusion:
no study available

Justification for classification or non-classification

The available studies demonstrate that the hydrotrope category substances are not skin sensitizers. Therefore a classification is not justified.