1,4,5,6,7,7-hexachloro-8,9,10-trinorborn-5-ene-2,3-dicarboxylic anhydride

Acute Toxicity: inhalation

Administrative data

Endpoint:

acute toxicity: inhalation

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Study undertaken and reported scientifically but not to GLP.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1978

Report date:

1978

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 433 draft (Acute Inhalation Toxicity: Fixed Concentration Procedure) (not officially approved)

Deviations:

not specified

GLP compliance:

no

Test type:

fixed concentration procedure

Test material

Test material information

Constituent 1

Reference substance name:

1,4,5,6,7,7-hexachloro-8,9,10-trinorborn-5-ene-2,3-dicarboxylic anhydride

EC Number:

204-077-3

EC Name:

1,4,5,6,7,7-hexachloro-8,9,10-trinorborn-5-ene-2,3-dicarboxylic anhydride

Cas Number:

115-27-5

Molecular formula:

C9H2Cl6O3

IUPAC Name:

1,4,5,6,7,7-hexachloro-8,9,10-trinorborn-5-ene-2,3-dicarboxylic anhydride

Details on test material:

- Name of test material (as cited in study report): Chlorendic anhydride- Physical state: Fine white powder containing some chunks.- Analytical purity: 93.8%- Lot/batch No.: 3-12-206

Test animals

Species:

rat

Strain:

other: CD

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS- Source: Charles River- Age at study initiation: - Weight at study initiation: males, 211 to 226 g; female, 213 to 232 g- Fasting period before study: No- Housing: Wire-mesh cages.- Diet: Purina laboratory chow, ad libitum - Water: ad libitum- Acclimation period: 1 weekENVIRONMENTAL CONDITIONS- Temperature (°C): - Humidity (%): - Air changes (per hr): - Photoperiod (hrs dark / hrs light): IN-LIFE DATES: From: To:

Administration / exposure

Route of administration:

inhalation: dust

Type of inhalation exposure:

whole body

Vehicle:

other: unchanged (no vehicle)

Details on inhalation exposure:

GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION- Exposure apparatus: Glass chamber- Exposure chamber volume: 160 litre- Method of holding animals in test chamber: Wire-mesh exposure cages.- Source and rate of air: rotary centrifugal air-pump located at the exhaust side of the chamber at 7.5 litres/min.- Method of conditioning air: - System of generating particulates/aerosols:Dispersing powder at a calculated rate.- Method of particle size determination: - Treatment of exhaust air:- Temperature, humidity, pressure in air chamber: TEST ATMOSPHERE- Brief description of analytical method used: - Samples taken from breathing zone: yes/noVEHICLE- Composition of vehicle (if applicable):- Concentration of test material in vehicle (if applicable):- Justification of choice of vehicle: - Lot/batch no. (if required): - Purity: TEST ATMOSPHERE (if not tabulated)- Particle size distribution:- MMAD (Mass median aerodynamic diameter) / GSD (Geometric st. dev.): CLASS METHOD (if applicable)- Rationale for the selection of the starting concentration:

Analytical verification of test atmosphere concentrations:

no

Duration of exposure:

1 h

Concentrations:

A total of 91.37 grams of the powders was disseminated during the 1 hour exposure period. The rate of powder dissemination was calculated to be 1.52 grams per minute. The rate of chamber airflow was 7.5 liters per minute and the chamber dust concentration was calculated to be 203.0 mg/l. The chamber atmosphere was extremely dusty.

No. of animals per sex per dose:

5

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days - Frequency of observations and weighing: Twice daily - Necropsy of survivors performed: no- Other examinations performed: clinical signs, body weight

Results and discussion

Effect levels

Sex:

male/female

Dose descriptor:

LC50

Effect level:

> 203 mg/L air

Based on:

other: Mortality

Exp. duration:

1 h

Mortality:

None

Clinical signs:

other: The immediate response of the rats to the experimental atmosphere was an increase of activity in preening. After several minutes of exposure this activity decreased. After 30 minutes of exposure six rats exhibited salivation. By the end of the exposure

Body weight:

A slight body weight loss was observed in 6 rats for 1 day post-exposure.

Gross pathology:

None

Applicant's summary and conclusion

Interpretation of results:

relatively harmless

Remarks:

Migrated informationCriteria used for interpretation of results: EU

Conclusions:

Inhalation exposure of 10 rats for 1 hour to a dust atmosphere of Chlorendic Anhydride at a metered concentration of 203.0 mg / l resulted in salivation during the exposure. A slight body weight loss was observed in 6 rats for 1 day post-exposure.