Benzonitrile, 4-[(4-chloro-2-pyrimidinyl)amino]-

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From 2016-06-21 to 2016-07-06

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2016

Report date:

2016

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Deviations:

yes

Remarks:

Deviations in RH and 2 animalswere excluded from results due to missing bandages on Day 2.

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.3 (Acute Toxicity (Dermal))

Deviations:

yes

Remarks:

Deviations in RH and 2 animals were excluded from results due to missing bandages on Day 2.

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.1200 (Acute Dermal Toxicity)

Deviations:

yes

Remarks:

Deviations in RH and 2 animalswere excluded from results due to missing bandages on Day 2.

Test guideline 4

Qualifier:

according to guideline

Guideline:

other: Japenese Ministry of Agriculture, Foresty and Fisheries (JMADD)

Version / remarks:

12 Nousan, Notification No 8147, November 2000

GLP compliance:

yes (incl. QA statement)

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

4-[(4-CHLOROPYRIMIDIN-2-YL)AMINO]BENZONITRILE

EC Number:

607-384-4

Cas Number:

244768-32-9

Molecular formula:

C11H7ClN4

IUPAC Name:

4-[(4-CHLOROPYRIMIDIN-2-YL)AMINO]BENZONITRILE

Test material form:

solid: particulate/powder

Details on test material:

- Name of test material (as cited in study reports): JNJ-4754724-AAA (T002488)
- Physical state: solid
- Appearance: light brown powder

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: I15FC2164, Janssen Pharmaceutica N.V.
- Expiration date of the lot/batch: 23-JUN-2017 (retest date)
- Manufacture date: 24-JUN-2015
- Purity/composition correction factor: 1

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Room temperature. The characterization and stability of the test item have been performed according to cGMP Guidelines
- Solubility and stability of the test substance in the solvent/vehicle: Homogeneity was assessed by visual inspection of the solutions and the formulations were stirred during dosing, which ensures homogeneity sufficiently for these kinds of studies.

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing: Preparation was kept at room temperature and dosed within 4 hours after adding the vehicle to the test item. Preparations were stirred on a magnetic stirrer during application. Adjustment was made for specific gravity of the vehicle.
No correction was made for purity of the test item as the correction factor is 1.

Test animals

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: 5 male and 5 female rats (nulliparous and non-pregnant), Wistar strain Crl:WI (Han) (outbred, SPF-Quality); Charles River Deutschland, Sulzfeld, Germany
- Age at study initiation: Young adult animals (approx. 12 weeks old)
- Weight at study initiation: 346, 326, 331, 347, 353 grams (males) and 195, 201, 193, 195, 199 grams (females)
- Housing: Individually housed in labeled Makrolon cages (MIII type, height 18 cm.) containing sterilized sawdust as bedding material (Lignocel S 8-15, JRS - J.Rettenmaier & Söhne GmbH + CO. KG, Rosenberg, Germany) and paper as cage-enrichment (Enviro-dri, Wm. Lillico & Son (Wonham Mill Ltd), Surrey, United Kingdom).
- Diet (e.g. ad libitum): ad libitum, free access to pelleted rodent diet.
- Water (e.g. ad libitum): ad libitum, free access to tap water.
- Acclimation period: at least 5 days before start of treatment under laboratory conditions. During the acclimatization period the animals were group housed in Makrolon cages (MIV type, height 18 cm).
- Health inspection At least prior to dosing. It was ensured that the animals were healthy and that the skin to be treated was intact and free from any abnormality.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 18-24 °C
- Humidity (%): 40-70%
- Air changes (per hr): at least 10
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Type of coverage:

occlusive

Vehicle:

propylene glycol

Details on dermal exposure:

TEST SITE
- Area of exposure: on the back of the animal
- % coverage: approx. 10% of the total body surface, i.e. approx. 25 cm² for males and 18 cm² for females
- Type of wrap if used: surgical gauze patch (Surgy 1D), successively covered with aluminum foil and Coban elastic bandage. A piece of Micropore tape was additionally used for fixation of the bandages in females only.

REMOVAL OF TEST SUBSTANCE
- Washing: After removal of dressing, the skin was cleaned of residual test item using tap water.
- Time after start of exposure: 24 h. Two animals were found without bandage on Day 2.

Duration of exposure:

24 h

Doses:

2000 mg/kg (single dosage) on Day 1

No. of animals per sex per dose:

5

Control animals:

no

Details on study design:

Treatment of animals and application of test item:
Method: Dermal application.
Clipping: One day before exposure (Day -1) an area of approximately 5x7 cm on the back of each animal was clipped.

Frequency of dosing: Single dosage, on Day 1.

Observations:
Observation period: until day 15 after treatment
- Mortality/Viability: Twice daily.
- Body weights: Days 1 (pre-administration), 8 and 15.
- Clinical signs: At periodic intervals on the day of dosing (Day 1) and once daily thereafter, until Day 15. The time of onset, degree and duration were recorded and the symptoms graded according to fixed scales:
Maximum grade 4: grading slight (1) to very severe (4)
Maximum grade 3: grading slight (1) to severe (3)
Maximum grade 1: presence is scored (1).
- Necropsy: At the end of the observation period, all animals were sacrificed by oxygen/carbon dioxide procedure and subjected to necropsy. Descriptions of all internal macroscopic abnormalities were recorded.

Statistics:

No statistical analysis was performed.

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 mortality occurred.

Clinical signs:

other: Chromodacryorrhoea (snout) was noted for all males and two out of three females on Days 1 and 2. White discoloration and/or scaliness were seen in the treated skin-area of the animals during the observation period. These local effects were considered not

Gross pathology:

No abnormalities were found at macroscopic post mortem examination of the animals.

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

The dermal LD50 value of T002488 in Wistar rats was established to exceed 2000 mg/kg body weight. Based on results, test substance does not have to be classified and has no obligatory labelling requirement for acute dermal toxicity according to the:
-Globally Harmonized System of Classification and Labelling of Chemicals (GHS) of the United Nations (2015) (including all amendments),
-Regulation (EC) No 1272/2008 on classification, labelling and packaging of substances and mixtures (including all amentments).