2-(2,4-dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolane-4-methanol

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From 2015-11-17 to 2015-12-01

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:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.1200 (Acute Dermal Toxicity)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test type:

other: limit test with a single dose

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

2-(2,4-dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolane-4-methanol

EC Number:

283-585-7

EC Name:

2-(2,4-dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolane-4-methanol

Cas Number:

84682-23-5

Molecular formula:

C14H14Cl2N2O3

IUPAC Name:

[2-(2,4-dichlorophenyl)-2-[(1H-imidazol-1-yl)methyl]-1,3-dioxolan-4-yl]methanol

Test material form:

solid: particulate/powder

Details on test material:

- Name of test material (as cited in study report): JNJ-16479489-AAA (T001159)
- Physical state: solid
- Appearance: off-white powder

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: M14IB5308
- Expiration date of the lot/batch: 03 February 2016 (retest date)
- Purity: 99.6%

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: At room temperature

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. 10 weeks old)
- Weight at study initiation: 180-277 grams
- Housing:group housed in Makrolon cages (MIV type, height 18 cm) during acclimatization period; 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


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

IN-LIFE DATES: From: 2015-11-17 To: 2015-12-01

Administration / exposure

Type of coverage:

not specified

Vehicle:

propylene glycol

Details on dermal exposure:

VEHICLE
- Justification for choice of vehicle: The vehicle was selected based on trial preparations performed at WIL Research Europe and on test item data supplied by the Sponsor. The vehicle was chosen from (in order of preference): water (Elix) (test item did not dissolve), 1% aq. carboxymethyl cellulose (test item did not dissolve), propylene glycol (spec.gravity 1.036) (turbid solution), polyethylene glycol 400 (spec. gravity 1.125) and corn oil (spec. gravity 0.92). There was no information available regarding the solubility or stability in vehicle.

DOSAGE PREPARATION
The preparation (w/w) was kept at room temperature and dosed within 4 hours after adding the vehicle to the test item. Homogeneity was assessed by visual inspection of the solutions and the formulations were stirred during dosing, which ensures homogeneity sufficient for these kinds of studies.
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 SITE
- Clipping: One day before exposure (Day -1) an area of approximately 5x7 cm on the back of each animal was clipped.
- Area of exposure: approx. 10% of the total body surface, i.e. approx. 25 cm² for males and 18 cm² for females
- % coverage: no data
- 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 (if done): after removal of dressing, the skin was cleaned of residual test item using tap water
- Time after start of exposure: 24 h

Duration of exposure:

24 h

Doses:

2000 mg/kg (single dosing)

No. of animals per sex per dose:

5

Control animals:

not specified

Details on study design:

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

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

No mortality occurred.

Clinical signs:

other: Piloerection was noted for one male and one female animal on Day 2. Chromodacryorrhoea was noted for three male and one female animals on Day 1 or 2. Scales, scabs and erythema maculate were seen in the treated skin-area and flanks of the animals during t

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 JNJ-16479489-AAA (T001159) in Wistar rats was established to exceed 2000 mg/kg body weight. Based on these results, the 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 (2011) (including all amendments) and Regulation (EC) No 1272/2008 on classification, labelling and packaging of substances and mixtures (including all amendments).