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Administrative data

Endpoint:
acute toxicity: dermal
Type of information:
experimental study
Adequacy of study:
key study
Study period:
06 - 20 July 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study has been performed according to OECD and EC guidelines and according to GLP principles.

Data source

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

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 402 (Acute Dermal Toxicity)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method B.3 (Acute Toxicity (Dermal))
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 870.1200 (Acute Dermal Toxicity)
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: Japanese Ministry of Agriculture, Forestry and Fisheries (JMAFF), 12 Nousan, Notification No 8147, November 2000; including the most recent partial revisions.
Deviations:
no
GLP compliance:
yes
Test type:
standard acute method
Limit test:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Bismuth oxy-iodide bromide
Cas Number:
340181-06-8
Molecular formula:
BiOIxBr(1-x), with x = 0.4 - 0.85
IUPAC Name:
Bismuth oxy-iodide bromide
Test material form:
solid: particulate/powder
Details on test material:
- test material: BiOI-BiOBr
- Substance type: inorganic
- Physical state: orange powder
- Stability under test conditions: stable
- Storage condition of test material: at room temperature in the dark
- pH: 7.5 (50 g/L)
- Stability at higher temperatures: stable (maximum temperature: 280°C, maximum duration 4 hours)
Specific details on test material used for the study:
pH: 7.5 (50g/ L)

Test animals

Species:
rat
Strain:
other: Wistar strain, Crl:WI (Han)
Sex:
male/female
Details on test animals or test system and environmental conditions:
- Source: Charles River Deutschland, Sulzfeld, Germany.
- Age at study initiation: Young adult animals (approx. 11 weeks old)
- Weight at study initiation: 319 - 349 g (males); 192 - 238 g (females)
- Housing: Individually housed in labeled Macrolon cages
- Diet: Free access to pelleted rodent diet (SM R/M-Z from SSNIFF® Spezialdiäten GmbH, Soest, Germany).
- Water: Free access to tap water.
- Acclimation period: At least 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19.7 – 21.6
- Humidity (%): 44 - 79
- Air changes (per hr): approx 15
- Photoperiod (hrs dark / hrs light): 12/12

In-Life phase: 06 - 20 July 2010

Administration / exposure

Type of coverage:
occlusive
Vehicle:
propylene glycol
Details on dermal exposure:
One day before exposure (Day -1) an area of approximately 5x7 cm on the back of the animal was clipped.

The formulation was applied in an area of approx. 10% of the total body surface, i.e. approx. 25 cm² for males and 18 cm² for females. The formulation was held in contact with the skin with a dressing, consisting of a surgical gauze patch, 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.

Frequency: Single dosage, on Day 1.

Washing: Following application, dressings were removed and the skin cleaned of residual test substance using tap water.
Duration of exposure:
24 hours.
Doses:
2000 mg/kg bw

No. of animals per sex per dose:
5
Control animals:
no
Details on study design:
VEHICLE
- Justification for choice of vehicle: The vehicle was selected based on trial formulations performed at NOTOX and on test substance data supplied by the sponsor.

Dose volume: 10 mL/kg bw.

DOSAGE PREPARATION: The formulation (w/w) was prepared within 4 hours prior to dosing. Homogeneity was accomplished to a visually acceptable level. Adjustment was made for specific gravity of the vehicle.

Duration of observation period following administration: 14 days
- Frequency of observations and weighing:
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.
- Necropsy of survivors performed: 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:
None.

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:
Chromodacryorrhoea was observed for one female on Day 1.
Body weight:
The changes noted in body weight gain in males and females were within the range expected for rats used in this type of study and were therefore considered not indicative of toxicity.
Gross pathology:
No abnormalities were found at macroscopic post mortem examination of the animals.
Other findings:
On the treated skin area, orange staining, scales and/or scabs were present among all animals during the observation period.

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
In an acute dermal toxicity study with rats, performed according to OECD/EC test guidelines, an LD50 >2000 mg/kg bw was determined.
Executive summary:

An acute dermal toxicity study with rats was performed according to OECD/EC test guidelines. In the 5 male and 5 female rats treated, no mortality occurred. On the treated skin area, orange staining, scales and/or scabs were present among all animals during the observation period. Chromodacryorrhoea was observed for one female on Day 1. The changes noted in body weight gain in males and females were within the range expected for rats used in this type of study and were therefore considered not indicative of toxicity. No abnormalities were found at macroscopic post mortem examination of the animals.

Based on these data, the dermal LD50 value in Wistar rats was established to exceed 2000 mg/kg bw.