Registration Dossier

Administrative data

Endpoint:
acute toxicity: dermal
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report Date:
2010

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 402 (Acute Dermal Toxicity)
GLP compliance:
yes (incl. certificate)
Test type:
standard acute method
Limit test:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report):4-Nitrotoluene-2-sulphonic acid
- Physical state: solid/beige
- Analytical purity: 80 % pNTSA, < 3 % H2SO4, < 1 % "Disulfon", rest: water
- Lot/batch No.: 090330
- Storage condition of test material: Room temperature

Test animals

Species:
rat
Strain:
Wistar
Sex:
male/female
Details on test animals and environmental conditions:
TEST ANIMALS
- Source: Charles River Wiga GmbH, Sulzfeld (Germany)
- Age at study initiation: Young adult animals (male approx. 8 weeks, female approx. 12 weeks)
- Weight at study initiation: Animals of comparable weight (± 20% of the mean weight)
- Housing: single housing
- Diet (e.g. ad libitum): ad libitum
- Water (e.g. ad libitum): ad libitum
- Acclimation period: at least 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22 °C ± 3°C
- Humidity (%): 30 - 70 %
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Type of coverage:
semiocclusive
Vehicle:
other: doubly distilled water
Details on dermal exposure:
TEST SITE
- Area of exposure: 40 cm²
- % coverage: 10 %

REMOVAL OF TEST SUBSTANCE
- Washing (if done): yes
- Time after start of exposure: 24 hours

Duration of exposure:
24 hours
Doses:
2000 mg/kg
No. of animals per sex per dose:
5
Control animals:
no
Details on study design:
- Duration of observation period following administration: 14 days
- Other examinations performed: clinical signs, pathology, histopathology

Results and discussion

Effect levels
Sex:
male/female
Dose descriptor:
LD50
Effect level:
> 2 000 mg/kg bw
Mortality:
No mortality occurred.
Clinical signs:
No systemic clinical signs were observed during clinical examination.
No local effects were observed.
Body weight:
The mean body weight of the animals increased throughout the study period withhin the normal range.
Gross pathology:
No macroscopic pathologic abnormalities were noted in the animals (5 males and 5 females) examined on the last day of observation.

Any other information on results incl. tables

Mortality

Dose (mg/kg bw):

2000

2000

Sex:

male

female

Administration:

1

1

No. of animals:

5

5

Mortality (animals):

No mortality

No mortality

Applicant's summary and conclusion