Bismuth bromide iodide oxide

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

06- 22 July 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method)

Version / remarks:

(2001)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.1 tris (Acute Oral Toxicity - Acute Toxic Class Method)

Version / remarks:

(2008)

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.1100 (Acute Oral Toxicity)

Version / remarks:

(2002)

Deviations:

no

Test guideline 4

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:

acute toxic class method

Limit test:

no

Test material

Test material information

Constituent 1

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: Crl:WI (Han)

Sex:

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: 179 - 189 g
- Fasting period before study: yes, overnight prior to dosing and until 3-4 hours after administration of the test substance.
- Housing: Group housing of 3 animals per cage 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- 22 July 2010

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

propylene glycol

Details on oral exposure:

GAVAGE METHOD: plastic feeding tubes.

Frequency: single dosage, on Day 1.

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.

MAXIMUM DOSE VOLUME APPLIED: 2000 mg/kg bw (10 mL/kg).

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

Doses:

2000 mg/kg bw

No. of animals per sex per dose:

6

Control animals:

no

Details on study design:

- 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:

No statistical analysis was performed (the method used is not intended to allow the calculation of a precise LD50 value).

Results and discussion

Effect levels

Key result

Sex:

female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

No mortality occurred.

Clinical signs:

Hunched posture was observed for one female on Day 1. Orange faeces was observed for all animals on Days 2 and/or 3.

Body weight:

The changes noted in body weight gain 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.

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

In an acute oral toxicity study with female rats, performed according to OECD/EC test guidelines, an LD50 >2000 mg/kg bw was determined.

Executive summary:

An acute oral toxicity study was performed according to OECD/EC test guidelines. Two groups of 3 female rats were dosed with 2000 mg/kg bw. No mortality occurred. Hunched posture was observed for one female on day 1. Orange faeces was observed for all animals on days 2 and/or 3. The changes noted in body weight gain 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 oral LD50 value in female Wistar rats was established to exceed 2000 mg/kg.