3-(isotridecyloxy)propylamine

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:

07-Jun-2010 to 17-Jun-2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: The study has been performed according to OECD and/or EC guidelines and according to GLP principles

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 471 (Bacterial Reverse Mutation Assay)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of assay:

bacterial reverse mutation assay

Test material

Test material information

Constituent 1

Reference substance name:

3-(isotridecyloxy)propylamine

EC Number:

256-881-9

EC Name:

3-(isotridecyloxy)propylamine

Cas Number:

50977-10-1

Molecular formula:

C16H35NO

IUPAC Name:

3-(isotridecyloxy)propan-1-amine

Details on test material:

- Name of test material (as cited in study report): 3-(Isotridecyloxy)-1-propane amine
- Substance type: Clear colourless liquid
- Physical state: Liquid
- Stability under test conditions: Stable
- Storage condition of test material: At room temperature in the dark

Method

Target gene:

- S. typhimurium: Histidine gene
- E. coli: Tryptophan gene

Species / strain

Species / strain 1

Species / strain / cell type:

S. typhimurium TA 1535, TA 1537, TA 98 and TA 100

Species / strain 2

Species / strain / cell type:

E. coli WP2 uvr A

Metabolic activation:

with and without

Metabolic activation system:

Rat liver S9-mix induced by a combination of phenobarbital and ß-naphthoflavone

Test concentrations with justification for top dose:

Experiment 1
Preliminary test (without and with S9) TA100 and WP2uvrA: 3, 10, 33, 100, 333, 1000, 3330 and 5000 µg/plate
Main study: TA1535, TA1537 and TA98:
Without and with S9-mix: 0.3, 1, 3, 10, 33 and 100 µg/plate
Experiment 2:
TA1535, TA1537, TA98 and TA100
Without S9-mix: 0.1, 0.3, 1, 3, 10 and 33 µg/plate
With S9-mix: 0.3, 1, 3, 10, 33 and 100 µg/plate
WP2uvrA
Without S9-mix: 0.3, 1, 3, 10, 33 and 100 µg/plate
With S9-mix: 1, 3, 10, 33, 100 and 333 µg/plate

Vehicle / solvent:

- Vehicle(s)/solvent(s) used: ethanol
- Justification for choice of solvent/vehicle: Test compound was stable and soluble in ethanol and ethanol has been accepted and approved by authorities and international guidelines

Controls

Controls 1

Negative solvent / vehicle controls:

yes

Positive controls:

yes

Positive control substance:

sodium azide

Remarks:

without S9

Migrated to IUCLID6: 5 µg/plate in saline for TA1535

Controls 2

Positive control substance:

9-aminoacridine

Remarks:

without S9

Migrated to IUCLID6: 60 µg/plate in water for TA1537

Controls 3

Positive control substance:

2-nitrofluorene

Remarks:

without S9

Migrated to IUCLID6: 10 µg/plate in DMSO for TA98

Controls 4

Positive control substance:

methylmethanesulfonate

Remarks:

without S9

Migrated to IUCLID6: 650 µg/plate in DMSO for TA100

Controls 5

Positive control substance:

4-nitroquinoline-N-oxide

Remarks:

without S9

Migrated to IUCLID6: 10 µg/plate in DMSO for WP2uvrA

Controls 6

Positive control substance:

other: 2-aminoanthracene in DMSO for all tester strains

Remarks:

with S9

Details on test system and experimental conditions:

METHOD OF APPLICATION: in agar (plate incorporation)

DURATION
- Exposure duration: 48 hour

NUMBER OF REPLICATIONS:
- Doses of the test substance were tested in triplicate in each strain. Two independent experiments were conducted.

NUMBER OF CELLS EVALUATED: 10E8 per plate

DETERMINATION OF CYTOTOXICITY
- Method: The reduction of the bacterial background lawn, the increase in the size of the microcolonies and the reduction of the revertant colonies.

OTHER EXAMINATIONS:
- The presence of precipitation of the test compound on the plates was determined.

Evaluation criteria:

A test substance is considered negative (not mutagenic) in the test if:
a) The total number of revertants in tester strain TA100 is not greater than two (2) times the concurrent control, and the total number of revertants in tester strains TA1535, TA1537, TA98 or WP2uvrA is not greater than three (3) times the concurrent control.
b) The negative response should be reproducible in at least one independently repeated experiment.

A test substance is considered positive if:
a) A two-fold (TA100) or more or a three-fold (TA1535, TA1537, TA98, WP2uvrA) or more increase above solvent control in the mean number of revertant colonies is observed in the test substance group.
b) In case a repeat experiment is performed when a positive response is observed in one of the tester strains, the positive response should be reproducible in at least one independently repeated experiment.

Results and discussion

Test results

Test results 1

Species / strain:

S. typhimurium TA 1535

Metabolic activation:

with and without

Genotoxicity:

negative

Cytotoxicity / choice of top concentrations:

cytotoxicity

Vehicle controls validity:

valid

Positive controls validity:

valid

Test results 2

Species / strain:

S. typhimurium TA 1537

Metabolic activation:

with and without

Genotoxicity:

negative

Cytotoxicity / choice of top concentrations:

cytotoxicity

Vehicle controls validity:

valid

Positive controls validity:

valid

Test results 3

Species / strain:

S. typhimurium TA 98

Metabolic activation:

with and without

Genotoxicity:

negative

Cytotoxicity / choice of top concentrations:

cytotoxicity

Vehicle controls validity:

valid

Positive controls validity:

valid

Test results 4

Species / strain:

S. typhimurium TA 100

Metabolic activation:

with and without

Genotoxicity:

negative

Cytotoxicity / choice of top concentrations:

cytotoxicity

Vehicle controls validity:

valid

Positive controls validity:

valid

Test results 5

Species / strain:

E. coli WP2 uvr A

Metabolic activation:

with and without

Genotoxicity:

negative

Cytotoxicity / choice of top concentrations:

cytotoxicity

Vehicle controls validity:

valid

Positive controls validity:

valid

Additional information on results:

TEST-SPECIFIC CONFOUNDING FACTORS
- Precipitation: Slight precipitation was observed at dose levels of 3330 and 5000 µg/plate

RANGE-FINDING/SCREENING STUDIES:
- In tester strain TA100, toxicity was observed at dose levels of 33 and 100 μg/plate and above in the absence and presence of S9-mix, respectively. In tester strain WP2uvrA, toxicity was observed at dose levels of 100 μg/plate and above in the absence and presence of S9-mix.

COMPARISON WITH HISTORICAL CONTROL DATA:
- The negative and strain-specific positive control values were within our laboratory historical control data ranges indicating that the test conditions were adequate and that the metabolic activation system functioned properly.

ADDITIONAL INFORMATION ON CYTOTOXICITY:
TA1535: without S9: 33 µg/plate and above and with S9: 33 µg/plate and above
TA1537: without S9: 33 µg/plate and above and with S9: 33 µg/plate and above
TA98: without S9: 33 µg/plate and above and with S9: 33 µg/plate and above
TA100: without S9: 33 µg/plate and above and with S9: 100 µg/plate and above
WP2uvrA: without S9: 100 µg/plate and above and with S9: 100 µg/plate and above

Applicant's summary and conclusion

Conclusions:

Interpretation of results (migrated information):
negative

Based on the results of this study it is concluded that 3-(Isotridecyloxy)-1-propane amine is not mutagenic in the Salmonella typhimurium reverse mutation assay and in the Escherichia coli reverse mutation assay.

Executive summary:

Evaluation of the mutagenic activity of 3-(lsotridecyloxy)-1-propane amine in theSalmonella typhimuriumreverse mutation assay and theEscherichia colireverse mutation assay (with independent repeat).

 

3-(lsotridecyloxy)-1-propane amine was tested in theSalmonella typhimuriumreverse mutation assay with four histidine-requiring strains ofSalmonella typhimurium(TA1535, TA1537, TA98 and TA100) and in theEscherichia colireverse mutation assay with a tryptophan-requiring strain ofEscherichia coli(WP2uvrA). The test was performed in two independent experiments in the presence and absence of S9-mix (rat liver S9-mix induced by a combination of phenobarbital andβ-naphthoflavone).

The study procedures described in this report were based on the most recent OECD and EC guidelines.

 

Batch 5001287 of 3-(Isotridecyloxy)-1-propane amine was a clear colourless liquid with a purity of 95.8% m/m (NMR). The test substance was dissolved in ethanol.

 

In the dose range finding test, 3-(lsotridecyloxy)-1-propane amine was tested up to concentrations of 5000 µg/plate in the absence and presence of S9-mix in the strains TA100 and WP2uvrA.

3-(Isotridecyloxy)-1-propane amine precipitated on the plates at dose levels of 3330 µg/plate and upwards. The bacterial background lawn was reduced or absent at concentrations of 33 µg/plate and upwards in tester strain TA100 and at concentrations of 100 µg/plate and upwards in tester strain WP2uvrA. Since there were too many toxic dose levels in tester strain TA100 this part of the study was repeated in the first mutation assay. Results of WP2uvrA in the dose range finding test were reported as part of the first experiment of the mutation assay.

 

Based on the results of the dose range finding test, 3-(lsotridecyloxy)-1-propane amine was tested in the first mutation assay at a concentration range of 0.3 to 100 µg/plate in the absence and presence of 5% (v/v) S9-mix in tester strains TA1535, TA1537, TA98 and TA100.

Cytotoxicity was observed in all tester strains. In an independent repeat of the assay with additional parameters, 3-(lsotridecyloxy)-1-propane amine was tested in the absence and presence of 10% (v/v) S9-mix in tester strains TA1535, TA1537, TA98, TA100 and WP2uvrA. The table below gives an overview of the concentrations tested in the second mutation assay. Cytotoxicity was observed in all tester strains.

 

Tester strains	Metabolic activation	Concentration range (µg/plate)
TA1535, TA1537, TA98 and TA100	-  10% (v/v) S9	Up to 33 IJg/plate Up to 100 IJg/plate
WP2uvrA	- 10% (v/v) S9	Up to 100 µg/plate Up to 333 µg/plate

- no 59-mix added.

 

3-(lsotridecyloxy)-1-propane amine did not induce a significant dose-related increase in the number of revertant (His+) colonies in each of the four tester strains (TA1535, TA1537, TA98 and TA100) and in the number of revertant (Trp+) colonies in tester strain WP2uvrA both in the absence and presence of 59-metabolic activation. These results were confirmed in an independently repeated experiment.