Benzoic acid, 5-methyl-2-(2H-1,2,3-triazol-2-yl)-

Skin sensitisation

Administrative data

Endpoint:

skin sensitisation: in vivo (LLNA)

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

In accordance with GLP

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2009

Report date:

2009

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay)

Deviations:

no

GLP compliance:

yes

Type of study:

mouse local lymph node assay (LLNA)

Test material

Test material information

Constituent 1

Reference substance name:

5-methyl-2-(2H-1,2,3-triazol-2-yl)benzoic acid

EC Number:

689-732-5

Cas Number:

956317-36-5

Molecular formula:

C10H9N3O2

IUPAC Name:

5-methyl-2-(2H-1,2,3-triazol-2-yl)benzoic acid

Details on test material:

Purity > 98 %

In vivo test system

Test animals

Species:

mouse

Strain:

CBA

Sex:

female

Details on test animals and environmental conditions:

TEST ANIMALS
- Source: Jackson Laboratories, ME, USA.
- Age at study initiation: ca 2 months.
- Weight at study initiation: 18.0 - 23.4 g.
- Housing: 1 per cage.
- Diet (e.g. ad libitum): PMI diet, ad lbitum.
- Water (e.g. ad libitum): Ad lbitum.
- Acclimation period: At least 5 days.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): Not specified, but controlled.
- Humidity (%): Not specified, but controlled.
- Air changes (per hr): Not specified.
- Photoperiod (hrs dark / hrs light): 12 hours light / 12 hours dark.

IN-LIFE DATES: From: April 22, 2009 To: May 5, 2009.

Study design: in vivo (LLNA)

Vehicle:

dimethyl sulphoxide

Concentration:

25%

No. of animals per dose:

One group of 5 females.

Details on study design:

As per OECD 429.

Positive control substance(s):

hexyl cinnamic aldehyde (CAS No 101-86-0)

Statistics:

Students' t-Test

Results and discussion

Positive control results:

The SI (Stimulation Index) of the positive control, 25% HCA, was 26.7.

In vivo (LLNA)

Results

Parameter:

SI

Value:

1.6

Test group / Remarks:

in DMSO at 25%

Remarks on result:

other: See Remark

Remarks:

The SI value for the test article at a concentration of 25% in DMSO was 1.6. In conclusion, topical application of the test article at 25% in DMSO resulted in an SI value of < 3. Therefore, the test article was considered not to be a skin sensitizer in this study.

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

In conclusion, topical application of the test article at 25% in DMSO resulted in an SI value of < 3. Therefore, the test article was considered not to be a skin sensitizer in this study.

Executive summary:

The test article was evaluated at a concentration of 25% in DMSO, with DMSO as the vehicle control and 25% HCA as the positive control.

All animals survived the in-life phase of the study and were observed to be normal. Ear thickness measurements and clinical observations indicated that treatment with the test article did not result in dermal irritation. The SI (Stimulation Index) of the positive control, 25% HCA, was 26.7. The SI value for the test article at a concentration of 25% in DMSO was 1.6. In conclusion, topical application of the test article at 25% in DMSO resulted in an SI value of < 3. Therefore, the test article was considered not to be a skin sensitizer in this study.