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Key value for chemical safety assessment

Genetic toxicity in vitro

Description of key information

There is no evidence of mutagenic or genotoxic intrinsic properties ofFatty acids, C18 unsatd., mono and diester with triethanolamine , di-Me sulfate-quaternized,based on evaluation of a full set of in-vitro genotoxicity tests required by REACH regulation conducted with the structural related source substance partially unsaturated TEA-Esterquat.

Link to relevant study records

Referenceopen allclose all

Endpoint:
in vitro cytogenicity / chromosome aberration study in mammalian cells
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Justification for type of information:
REPORTING FORMAT FOR THE ANALOGUE APPROACH
1. HYPOTHESIS FOR THE ANALOGUE APPROACH
The hypothesis for this analogue approach is that target and source substances, being different compounds, have similar (eco) toxicological properties based on structural similarity with common functional groups; a quaternized ethanolamine moiety, one to three ester groups with a typical UVCB distribution with long-chain fatty acids of natural origin.
Furthermore identical precursors (triethanolamine, long-chain fatty acids, dimethyl sulphate) are used for manufacturing. Therefore common breakdown products via physical and biological processes, which result in structurally similar chemicals, are evident.
For further information refer to general justification for read-across attached to chapter 13 of this IUCLID file.

2. SOURCE AND TARGET CHEMICAL(S) (INCLUDING INFORMATION ON PURITY AND IMPURITIES)
See general justification for read-across attached to chapter 13 of this IUCLID file.

3. ANALOGUE APPROACH JUSTIFICATION
See general justification for read-across attached to chapter 13 of this IUCLID file.

4. DATA MATRIX
See general justification for read-across attached to chapter 13 of this IUCLID file.
Reason / purpose:
read-across source
Reason / purpose:
read-across: supporting information
Key result
Species / strain:
Chinese hamster lung fibroblasts (V79)
Metabolic activation:
with and without
Genotoxicity:
negative
Cytotoxicity / choice of top concentrations:
cytotoxicity
Vehicle controls validity:
valid
Untreated negative controls validity:
valid
Positive controls validity:
valid
Endpoint:
in vitro gene mutation study in bacteria
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Justification for type of information:
REPORTING FORMAT FOR THE ANALOGUE APPROACH
1. HYPOTHESIS FOR THE ANALOGUE APPROACH
The hypothesis for this analogue approach is that target and source substances, being different compounds, have similar (eco) toxicological properties based on structural similarity with common functional groups; a quaternized ethanolamine moiety, one to three ester groups with a typical UVCB distribution with long-chain fatty acids of natural origin.
Furthermore identical precursors (triethanolamine, long-chain fatty acids, dimethyl sulphate) are used for manufacturing. Therefore common breakdown products via physical and biological processes, which result in structurally similar chemicals, are evident.
For further information refer to general justification for read-across attached to chapter 13 of this IUCLID file.

2. SOURCE AND TARGET CHEMICAL(S) (INCLUDING INFORMATION ON PURITY AND IMPURITIES)
See general justification for read-across attached to chapter 13 of this IUCLID file.

3. ANALOGUE APPROACH JUSTIFICATION
See general justification for read-across attached to chapter 13 of this IUCLID file.

4. DATA MATRIX
See general justification for read-across attached to chapter 13 of this IUCLID file.
Reason / purpose:
read-across source
Reason / purpose:
read-across: supporting information
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:
valid
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:
valid
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:
valid
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:
valid
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:
valid
Positive controls validity:
valid
Endpoint:
in vitro gene mutation study in mammalian cells
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Justification for type of information:
REPORTING FORMAT FOR THE ANALOGUE APPROACH
1. HYPOTHESIS FOR THE ANALOGUE APPROACH
The hypothesis for this analogue approach is that target and source substances, being different compounds, have similar (eco) toxicological properties based on structural similarity with common functional groups; a quaternized ethanolamine moiety, one to three ester groups with a typical UVCB distribution with long-chain fatty acids of natural origin.
Furthermore identical precursors (triethanolamine, long-chain fatty acids, dimethyl sulphate) are used for manufacturing. Therefore common breakdown products via physical and biological processes, which result in structurally similar chemicals, are evident.
For further information refer to general justification for read-across attached to chapter 13 of this IUCLID file.

2. SOURCE AND TARGET CHEMICAL(S) (INCLUDING INFORMATION ON PURITY AND IMPURITIES)
See general justification for read-across attached to chapter 13 of this IUCLID file.

3. ANALOGUE APPROACH JUSTIFICATION
See general justification for read-across attached to chapter 13 of this IUCLID file.

4. DATA MATRIX
See general justification for read-across attached to chapter 13 of this IUCLID file.
Reason / purpose:
read-across source
Reason / purpose:
read-across: supporting information
Key result
Species / strain:
Chinese hamster lung fibroblasts (V79)
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
Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (negative)

Genetic toxicity in vivo

Description of key information

Negative results from a Mammalian Erythrocyte Micronucleus Test with the read-across substance partially unsaturated TEA-Esterquat are available for evaluation of in vivo genetic toxicity of Fatty acids, C18 unsatd., mono and diester with triethanolamine , di-Me sulfate-quaternized.

Link to relevant study records
Reference
Endpoint:
in vivo mammalian somatic cell study: cytogenicity / erythrocyte micronucleus
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Justification for type of information:
REPORTING FORMAT FOR THE ANALOGUE APPROACH
1. HYPOTHESIS FOR THE ANALOGUE APPROACH
The hypothesis for this analogue approach is that target and source substances, being different compounds, have similar (eco) toxicological properties based on structural similarity with common functional groups; a quaternized ethanolamine moiety, one to three ester groups with a typical UVCB distribution with long-chain fatty acids of natural origin.
Furthermore identical precursors (triethanolamine, long-chain fatty acids, dimethyl sulphate) are used for manufacturing. Therefore common breakdown products via physical and biological processes, which result in structurally similar chemicals, are evident.
For further information refer to general justification for read-across attached to chapter 13 of this IUCLID file.

2. SOURCE AND TARGET CHEMICAL(S) (INCLUDING INFORMATION ON PURITY AND IMPURITIES)
See general justification for read-across attached to chapter 13 of this IUCLID file.

3. ANALOGUE APPROACH JUSTIFICATION
See general justification for read-across attached to chapter 13 of this IUCLID file.

4. DATA MATRIX
See general justification for read-across attached to chapter 13 of this IUCLID file.
Reason / purpose:
read-across source
Reason / purpose:
read-across: supporting information
Key result
Sex:
male/female
Genotoxicity:
negative
Toxicity:
no effects
Remarks:
A slight reduction in the ration of polychromatic to normochromatic erythrocytes was determined in female mice 24 and 48 h after administration, indicating possibly a weak toxic effect to the bone marrow
Vehicle controls validity:
valid
Negative controls validity:
valid
Positive controls validity:
valid
Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (negative)

Additional information

No experimental data are available for the assessment of genetic toxicity of the target substanceFatty acids, C18 unsatd., mono and diester with triethanolamine , di-Me sulfate-quaternized. However, reliable relevant data are available for the closely related source substance partially unsaturated TEA-Esterquat.

The full set of in vitro tests required by REACH Regulation Annexes VII and VIII is covered with the studies. There was no evidence of mutagenic or genotoxic intrinsic properties in any of the performed studies. Additional data from an in vivo mouse micronucleus Test are available, likewise showing no evidence to cause any chromosomal damage in the bone marrow of mice.

In vitro data

A reverse bacterial gene mutation assay (Ames-Test, plate incorporation assay) according to OECD Guideline 471(1997) with partially unsaturated TEA-Esterquat was negative up to the limit concentration of 5000 µg/plate with and without mammalian metabolic activation (rat liver S9-mix 10 and 30 %) in S. typhimurium strains TA 1535, TA 1537, TA 98, TA 100 and E. coli WP2 uvrA (pKM101).

Significant bacteriotoxic effects of varying severity were observed, depending on the test strain and the presence of metabolic activation. Generally, bacteriotoxicity was less pronounced in the presence of metabolic activation, especially at concentrations of 30 % S9-mix. Precipitation was observed at 1600 µg/plate and above. The positive controls induced the appropriate responses in the corresponding strains. There was no evidence of induced mutant colonies over background in any of the tester strains in the presence or absence of mammalian metabolic activation.

 

In a mammalian cell gene mutation assay (HPRT locus) according to OECD guideline 476, Chinese hamster lung fibroblasts (V79) cells cultured in vitro were exposed to partially unsaturated TEA-Esterquat (100 % a.i. of UVCB description) at concentrations up to 200 µg/mL in the absence and up to 1500 µg/mL in the presence of mammalian metabolic activation (rat liver S9). 

The concentration range of the main experiments was limited by the solubility of the test item in aqueous medium and by cytotoxic effects. The assay was performed in two independent experiments, using two parallel cultures each. A treatment period of 4 hours was used for all experiments, with the exception of the second experiment with metabolic activation, were a 24 hour treatment period was selected for the cultures. No substantial and reproducible dose dependent increase of the mutation frequency was observed in both experiments. Appropriate reference mutagens, used as positive controls, induced a distinct increase of mutant colonies and, thus, showed the sensitivity of the test system and the activity of the metabolic activation system.

The results of this HPRT assay indicate, that partially unsaturated TEA-Esterquat did not cause a positive response in the non-activated and S9-activated systems and was assessed to be negative under the conditions of this study.

 

In a mammalian cell cytogenicity assay according to OECD Guideline 473 1997, V79 cell cultures were exposed to partially unsaturated TEA-Esterquat at concentration ranges of 3.1 – 200 µg/mL without metabolic activation and 4.7 – 600 µg/mL in the presence of mammalian metabolic activation.

In experiment I and II, in the absence and the presence of S9 mix, no biological relevant increase in the number of cells carrying structural chromosome aberrations was observed. However, in the presence of S9 mix two significant (p < 0.05) increases were observed, in experiment I at preparation interval 18 hrs after treatment with 37.5 µg/mL (4 % aberrant cells, exclusive gaps), and in experiment II at preparation interval 28 hrs with 300 µg/mL (4.8 % aberrant cells, exclusive gaps). In addition, a dose related increase in the number of cells carrying structural chromosome aberrations was observed in experiment II with metabolic activation.

A confirmatory experiment III was performed to verify these observations. In the repeated experiment in the presence of S9 mix after

4 hrs treatment at a prolonged 28 hrs preparation interval no biologically relevant increase in the number of cells carrying structural chromosome aberrations was observed. Although the aberration rates showed a dose related increase, the values were clearly within the historical control data range of the testing laboratory. Finally, the observations of experiment II in the presence of S9 mix were not confirmed in experiment III and therefore they have to be regarded as biologically insignificant.

In all experiments, no biologically relevant increase in the rate of polyploid metaphases was found.

In conclusion it can be stated that under the experimental conditions reported, the test item did not induce structural or numeric chromosome aberrations as determined by the chromosome aberration test in V79 cells (Chinese hamster cell line) in vitro. The test item is considered to be non-clastogenic in this chromosome aberration test with and without S9 mix when tested up to cytotoxic test item concentrations.

 

In vivo data

In a mouse bone marrow micronucleus assay according to OECD guideline No. 474, 1983, 6 male and 6 female albino mice (CFW1) per group were treated by oral intubation with partially unsaturated TEA-Esterquat at a dose of 5000 mg/kg bw. Bone marrow cells were harvested at 24, 48 and 72 hours post-treatment.

There were no signs of toxicity as indicated by an enhanced mortality rate. A slight reduction in the ratio of polychromatic to normochromatic erythrocytes were determined in female mice 24 and 48 h after administration, indicating possibly a weak toxic effect to the bone marrow. The partially unsaturated TEA-Esterquat was tested at an adequate dose, based on the results of the range-finding test. The positive control induced the appropriate response.

There was no significant increase in the frequency of micronucleated polychromatic erythrocytes in bone marrow after any treatment time.

 

There are no data gaps for the endpoint genetic toxicity. No human data are available. However, there is no reason to believe that these results would not be applicable to humans.

Justification for read-across

The read-across is built on the hypothesis that target and source substances, being different compounds, have similartoxicologicalproperties based on structural similaritywith common functional groups.

A detailed justification for read-across is attached to chapter 13 of the IUCLID file.

Justification for classification or non-classification

Based on available data from a full set of in-vitro genotoxicity tests required by REACH regulation and additional information from an in vivo studyFatty acids, C18 unsatd., mono and diester with triethanolamine , di-Me sulfate-quaternizeddoes not need to be classified for germ cell mutagenicity according to CLP, EU GHS (Regulation (EC) No 1272/2008).