Benzamide, N-[[4-[(cyclopropylamino)carbonyl]phenyl]sulfonyl]-2-methoxy-

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

03 Feb - 17 Feb 2005

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2005

Report date:

2005

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Version / remarks:

adopted 12 May 1987

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity: Fixed Dose Procedure)

Version / remarks:

adopted 9 Oct 2017

Deviations:

not applicable

Remarks:

The study was correctly conducted in accordance with an old version of the guideline as a standard acute method. The current requirements of the Fixed Dose Procedure in the current guideline version do not apply.

GLP compliance:

yes

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

-

EC Number:

485-320-2

EC Name:

-

Cas Number:

221667-31-8

Molecular formula:

C18H18N205S

IUPAC Name:

N-[4-(cyclopropylcarbamoyl)benzenesulfonyl]-2-methoxybenzamide

Test animals

Species:

rat

Strain:

other: Wistar HsdCpb:Wu

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Harlan/Winkelmann GmbH, Borchen, Germany.
- Age at study initiation: Approx. 9 -13 weeks
- Body Weight at study initiation: 245 - 281 g for males and 205 - 223 g for females.
- Housing: Caged individually in polycarbonate cages on low dust wood granulate bedding.
- Diet: Standard diet for rats and mice "Provimi Kliba 3883.0.15 Maus/Ratte Haltung, Kaiseraugst Switzerland", ad libitum.
- Water: Tap water, ad libitum.
- Acclimation period: At least 5 days.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22 ± 2
- Humidity (%): 55 ± 5
- Air changes (per hr): 10
- Photoperiod (hrs dark / hrs light): 12/12

IN-LIFE DATES: From: To: 2005-02-03 to 2005-02-17

Administration / exposure

Type of coverage:

semiocclusive

Vehicle:

unchanged (no vehicle)

Details on dermal exposure:

TEST SITE
- Area of exposure: Back and flanks.
- % coverage: Approx. 10% (6.0 cm x 5.0 cm = 30.0 cm²)
- Type of wrap if used: Test material was placed on a wet gauze-layer of a "Cutiplast® steril" coated with air-tight "Leukoflex®" gauze strip which was placed on the rat's back and secured in place using "Peha®-Haft" cohesive stretch tape (8 cm x 23 cm) and additionally covered with a "Lomir biomedical Inc rat jacket" and connnected with a safety pin to the stretch tape.

REMOVAL OF TEST SUBSTANCE
- Washing: Rinsed with tepid water using soap and gently patting the area dry.
- Time after start of exposure: 24 h

TEST MATERIAL
- Amount(s) applied: 2000 mg/kg bw; 21.8 - 25 mg/cm² for males and 18.2 - 19.8 mg/cm² for females.
- Constant volume or concentration used: yes
- For solids, paste formed: No, test substance was applied via a wet gauze layer.

Duration of exposure:

24 hours

Doses:

2000 mg/kg bw

No. of animals per sex per dose:

5

Control animals:

not required

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Clinical signs and mortality rates were determined several times on the day of application and subsequently at least once daily thereafter. Body weight and bodyweight gain were checked weekly until the end of the study.
- Necropsy of survivors performed: Yes

Statistics:

Means and standard deviations were calculated for bodyweights
The LD50 value was calculated with the aid of a software program according to Spearman, Karber (D. J. Finney; Statistical method in biological assay, 2nd Edition, Griffin, London, 524-530; 1971). The algorithm was taken from L. Sachs (Angewandte Statistik, 6th Edition 1984, pp. 178 ff.).
Where calculation of the LD50 using the software program was not possible or meaningful, an assessment was made based on the applied dose and dose-response curve, respectively.

Results and discussion

Effect levels

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

No deaths occurred during the study.

Clinical signs:

other: Clinical signs of toxicity were not observed during the 14-day observation period.

Gross pathology:

The necropsies performed at the end of the study revealed no specific findings.

Applicant's summary and conclusion

Interpretation of results:

other: CLP/EU GHS criteria not met, no classification required according to Regulation (EC) No 1272/2008.

Conclusions:

The study was performed in accordance to OECD TG 402 under GLP conditions and is considered reliable. The LD50 was determined to be > 2000 mg/kg bw.