Registration Dossier
Registration Dossier
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EC number: - | CAS number: -
Endpoint summary
Administrative data
Key value for chemical safety assessment
Genetic toxicity in vitro
Description of key information
OECD 471: non-mutagenic in bacterial cells
Link to relevant study records
- 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:
- 2017-08-17 to 2017-11-23
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 471 (Bacterial Reverse Mutation Assay)
- Version / remarks:
- adopted 21 July 1997
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.13/14 (Mutagenicity - Reverse Mutation Test Using Bacteria)
- Version / remarks:
- dated 30 May 2008
- Deviations:
- no
- GLP compliance:
- yes
- Type of assay:
- bacterial reverse mutation assay
- Target gene:
- HIS operon (S. thyphimurium)
TRP operon (E. coli) - Species / strain / cell type:
- S. typhimurium TA 1535
- Details on mammalian cell type (if applicable):
- his G 46, uvrB, rfa
- Additional strain / cell type characteristics:
- other: mutations in the histidine operon
- Species / strain / cell type:
- S. typhimurium TA 1537
- Details on mammalian cell type (if applicable):
- his C 3076, uvrB, rfa
- Additional strain / cell type characteristics:
- other: mutations in the histidine operon
- Species / strain / cell type:
- S. typhimurium TA 98
- Details on mammalian cell type (if applicable):
- his D 3052, uvrB, rfa + R-factor
- Additional strain / cell type characteristics:
- other: mutations in the histidine operon
- Species / strain / cell type:
- S. typhimurium TA 100
- Details on mammalian cell type (if applicable):
- his G 46, uvrB, rfa + R-factor
- Additional strain / cell type characteristics:
- other: mutations in the histidine operon
- Species / strain / cell type:
- E. coli WP2
- Details on mammalian cell type (if applicable):
- uvrA pkM101
- Additional strain / cell type characteristics:
- other: mutations in the tryptophan operon
- Metabolic activation:
- with and without
- Metabolic activation system:
- liver S9 mix from Aroclor 1254-pretreated rats with standard co-factors
- Test concentrations with justification for top dose:
- The test material concentrations used were selected according to the EC and OECD guidelines for this test system and the requirements of the Labor Ministry of Japan:
Experiment I: 3; 10; 33; 100; 333; 1000; 2500; and 5000 μg/plate
Experiment II:
Strains TA 1535, TA 1537 and WP2 uvrA: 10; 33; 100; 333; 1000; 2500; and 5000 μg/plate
Strain TA 98: 3; 10; 33; 100; 333; 1000; and 2500 μg/plate
Strain TA 100: 0.1; 0.3; 1; 3; 10; 33; 100; 333; and 1000 μg/plate - Vehicle / solvent:
- DMSO
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Positive controls:
- yes
- Positive control substance:
- sodium azide
- methylmethanesulfonate
- other: 4-nitro-o-phenylene-diamine
- Remarks:
- without S9
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Positive controls:
- yes
- Positive control substance:
- other: 2-aminoanthracene
- Remarks:
- with S9
- Details on test system and experimental conditions:
- Experiment I was performed as a plate incorporation assay.
Since a negative result was obtained in this experiment, experiment II was performed as a pre-incubation assay. - Rationale for test conditions:
- according to Guideline
- Evaluation criteria:
- A test item is considered as a mutagen if a biologically relevant increase in the number of revertants exceeding the threshold of twice (strains TA 98, TA 100, and WP2 uvrA) or thrice (strains TA 1535 and TA 1537) the colony count of the corresponding solvent control is observed.
A dose dependent increase is considered biologically relevant if the threshold is exceeded at more than one concentration.
An increase exceeding the threshold at only one concentration is judged as biologically relevant if reproduced in an independent second experiment.
A dose dependent increase in the number of revertant colonies below the threshold is regarded as an indication of a mutagenic potential if reproduced in an independent second experiment. However, whenever the colony counts remain within the historical range of negative and solvent controls such an increase is not considered biologically relevant. - Statistics:
- According to the OECD guideline 471, a statistical analysis of the data is not mandatory.
- Key result
- Species / strain:
- S. typhimurium TA 1535
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- not examined
- Positive controls validity:
- valid
- Key result
- Species / strain:
- S. typhimurium TA 1537
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- not examined
- Positive controls validity:
- valid
- Key result
- Species / strain:
- S. typhimurium TA 98
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- not examined
- Positive controls validity:
- valid
- Key result
- Species / strain:
- S. typhimurium TA 100
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- not examined
- Positive controls validity:
- valid
- Key result
- Species / strain:
- E. coli WP2 uvr A pKM 101
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- not examined
- Positive controls validity:
- valid
- Conclusions:
- With and without addition of S9 mix as the external metabolizing system, the test item was not mutagenic under the experimental conditions described.
Reference
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (negative)
Genetic toxicity in vivo
Endpoint conclusion
- Endpoint conclusion:
- no study available
Additional information
Justification for classification or non-classification
Based on the provided information there is no need for classification according to the EU Regulation (EC) No 1272/2008 on Classification, Labelling and Packaging of Substances and Mixtures.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
