(pentabromophenyl)methyl acrylate

Genetic toxicity: in vitro

Administrative data

Endpoint:

in vitro gene mutation study in bacteria

Remarks:

Type of genotoxicity: gene mutation

Type of information:

experimental study

Adequacy of study:

key study

Study period:

25/03/2003-11/05/2003

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP comparable to OECD guideline

Cross-reference

Cross-reference 1

Reason / purpose for cross-reference:

reference to same study

Cross-reference 2

Reason / purpose for cross-reference:

reference to other study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2003

Report date:

2003

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 471 (Bacterial Reverse Mutation Assay)

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.13/14 (Mutagenicity - Reverse Mutation Test Using Bacteria)

Test guideline 3

Qualifier:

according to guideline

Guideline:

other: EPA OPPTS harmonised guidelines

Principles of method if other than guideline:

/

GLP compliance:

yes (incl. QA statement)

Type of assay:

bacterial reverse mutation assay

Test material

Test material information

Constituent 1

Reference substance name:

(pentabromophenyl)methyl acrylate

EC Number:

261-767-7

EC Name:

(pentabromophenyl)methyl acrylate

Cas Number:

59447-55-1

Molecular formula:

C10H5Br5O2

IUPAC Name:

(2,3,4,5,6-pentabromophenyl)methyl prop-2-enoate

Test material form:

solid: particulate/powder

Remarks:

migrated information: powder

Details on test material:

- Name of test material (as cited in study report):FR-1025M

- Substance type: monomer
- Physical state: white powder
- Lot/batch No.:020313
- Storage condition of test material:room temperature in the dark

Method

Target gene:

uvrB-, uvrA-, WP2uvrA-

Species / strain

Species / strain / cell type:

S. typhimurium TA 1535, TA 1537, TA 98, TA 100 and E. coli WP2

Details on mammalian cell type (if applicable):

- Type and identity of media:stored at -196°C in a Statebourne liquid nitrogen freezer, model SXR34
- Properly maintained: yes, prior to the master strains being used, characterisation checks were carried out to confirm the amino-acid requirement, presence of rfa, R factors, uvrB or uvrA mutation and the spontaneous reversion rate.

Metabolic activation:

with and without

Metabolic activation system:

S9-mix

Test concentrations with justification for top dose:

Preliminary test: 0, 0.15, 0.5, 1.5, 5, 15, 50, 150, 500, 1500 and 5000 μg/plate
Experiment 1: 50, 150, 500, 1500 and 5000 μg/plate
Experiment 2: 50, 150, 500, 1500 and 5000 μg/plate

Vehicle / solvent:

- Vehicle(s)/solvent(s) used: DMSO
- Justification for choice of solvent/vehicle: insoluble in distilled water at 50mg/ml but was soluble in dimethyl sulphoxide at the same concentration.

Controls

Controls 1

Negative solvent / vehicle controls:

yes

Positive controls:

yes

Positive control substance:

N-ethyl-N-nitro-N-nitrosoguanidine

Remarks:

without metabolic activation

Migrated to IUCLID6: for strain TA100, TA1535, WPuvrA-

Controls 2

Positive controls:

yes

Positive control substance:

9-aminoacridine

Remarks:

without metabolic activation

Migrated to IUCLID6: for strain TA1537

Controls 3

Positive controls:

yes

Positive control substance:

4-nitroquinoline-N-oxide

Remarks:

without metabolic activation

Migrated to IUCLID6: For strain TA98

Controls 4

Positive controls:

yes

Positive control substance:

benzo(a)pyrene

Remarks:

with metabolic activation

Migrated to IUCLID6: and 2-aminoanthracene

Details on test system and experimental conditions:

METHOD OF APPLICATION: in agar (plate incorporation)

DURATION
- Preincubation period :10hours
- Exposure duration:48h

NUMBER OF REPLICATIONS: 3

Evaluation criteria:

The test material may be considered positive in this test system if the following criteria are met:
The test material should have induced a reproducible, dose-related and statistically (Dunnett's method of linear regression) significant increase in the revertant count in at least one strain of bacteria.

Statistics:

Dunnett's method of linear regression

Results and discussion

Test results

Species / strain:

S. typhimurium TA 1535, TA 1537, TA 98, TA 100 and E. coli WP2

Metabolic activation:

with and without

Genotoxicity:

negative

Cytotoxicity / choice of top concentrations:

not determined

Vehicle controls validity:

valid

Positive controls validity:

valid

Additional information on results:

RANGE-FINDING/SCREENING STUDIES:The test material was non-toxic to the strains of the bacteria used (TA100 and WP2uvrA-). The test material formulation and S9-mix used in this experiment were both shown to be effectively sterile.

COMPARISON WITH HISTORICAL CONTROL DATA: yes

Remarks on result:

other: all strains/cell types tested

Remarks:

Migrated from field 'Test system'.

Applicant's summary and conclusion

Conclusions:

Interpretation of results (migrated information):
negative

The test material was considered to be non-mutagenic under the conditions of this test.

Executive summary:

INTRODUCTION

The method was designed to meet the requirements of the OECD guideline No. 471, Method B13/14 (EC), OPPTS guidelines (EPA)

METHODS

Salmonalle typhimurium strains TA1535, TA1537, TA98, TA100 and Escherichia coli strain WP2uvrA- were treated with the test material using the Ames plate incorporation method at five dose levels, in triplicate, both with and without the addition of a rat liver homogenate metabolising system (10% liver S9 in standard co-factors). The dose range was determined in a preliminary toxicity assay and was 50 to 5000µg/plate in the first experiment. The experiment was repeated on a separate day using the same dose range as Experiment 1, fresh cultures of the bacterial strains and fresh test material formulations.

RESULTS

The vehicle (dimethyl sulphoxide) control plates gave counts of revertant colonies within the normal range. All of the positive control chemicals used in the test induced marked increases in the frequency of revertant colonies, both with or without metabolic activation. Thus the sensitivity of the assay and the efficacy of the S9 -mix were validated.

The test material caused no visible reduction in the growth of the bacterial background lawn at any dose level. The test material was, therefore, tested up to the maximum recommended dose level of 5000µg/plate. A fine grain-like precipitate with oil-like swirls was observed at and above 500µg/plate, this did not prevent the scoring of revertant colonies.

No significant increases in the frequency of revertant colonies were recorded for any of the bacterial strains, with any dose of the test material, either with or without metabolic activation.

CONCLUSION

The test material was considered to be non-mutagenic under the conditions of this test.