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EC number: 947-894-7 | CAS number: -
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
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- Density
- Particle size distribution (Granulometry)
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- Stability: thermal, sunlight, metals
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- Endpoint summary
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- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
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- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
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- Carcinogenicity
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- Additional toxicological data
Genetic toxicity: in vitro
Administrative data
- Endpoint:
- in vitro gene mutation study in bacteria
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 09 April 2018 - 18 June 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 471 (Bacterial Reverse Mutation Assay)
- Version / remarks:
- 1997
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.13/14 (Mutagenicity - Reverse Mutation Test Using Bacteria)
- Version / remarks:
- 2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of assay:
- bacterial reverse mutation assay
Test material
- Reference substance name:
- (2-hydroxy-1,1-dimethylethyl)ammonium chloride
- EC Number:
- 221-713-5
- EC Name:
- (2-hydroxy-1,1-dimethylethyl)ammonium chloride
- Cas Number:
- 3207-12-3
- Molecular formula:
- C4H11NO.ClH
- IUPAC Name:
- 1-hydroxy-2-methylpropan-2-aminium chloride
- Test material form:
- liquid
1
Method
Species / strain
- Species / strain / cell type:
- S. typhimurium TA 1535, TA 1537, TA 98, TA 100 and TA 102
- Metabolic activation:
- with and without
- Metabolic activation system:
- induced rat liver S9 mix
- Test concentrations with justification for top dose:
- 0.05, 0.16, 0.5, 1.6 and 5 µL/plate
Justification for top dose: based on the results of initial cytotoxicity test - Vehicle / solvent:
- - Vehicle/solvent used: water
- Justification for choice of solvent/vehicle: recommended by guideline
Controls
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- 9-aminoacridine
- 2-nitrofluorene
- sodium azide
- mitomycin C
- other: 2-Aminoanthracene: 4 µg/plate, all strains with S9
- Details on test system and experimental conditions:
- METHOD OF APPLICATION: in agar (plate incorporation); preincubation
- Cell density at seeding: 10^8 viable cells per plate
DURATION
- Preincubation period: 30-45 min (pre-incubation method)
- Exposure duration: 48-72 hrs (plate incorporation and pre-incubation method)
NUMBER OF REPLICATIONS: 3
DETERMINATION OF CYTOTOXICITY
- Method: determination of thinning or disappearance of the bacterial background lawn - Rationale for test conditions:
- According to guideline and based on preliminary dose-range finding study.
- Evaluation criteria:
- A substance is considered positive if the following criteria apply:
There should be a dose related increase over the range tested and/or a reproducible increase in the mean revertants per plate of at least one tester strain over a minimum of two increasing doses of the test item either in the presence or absence of the metabolic activation system.
The test will be judged positive if the increase in mean revertants at the peak of the dose response is equal to or greater than 2 times the mean vehicle control value in Salmonella typhimurium strains TA98, TA100 and TA102 or equal to or greater than 3 times the mean vehicle control value in tester strains TA1535 and TA1537.
Results and discussion
Test resultsopen allclose all
- Key result
- Species / strain:
- S. typhimurium TA 1535
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Remarks:
- Cytotoxicity was observed only at the highest tested concentration (5 µL/plate).
- 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
- Remarks:
- Cytotoxicity was observed only at the highest tested concentration (5 µL/plate).
- 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
- Remarks:
- Cytotoxicity was observed only at the highest tested concentration (5 µL/plate).
- 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
- Remarks:
- Cytotoxicity was observed only at the highest tested concentration (5 µL/plate).
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- not examined
- Positive controls validity:
- valid
- Key result
- Species / strain:
- S. typhimurium TA 102
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Remarks:
- Cytotoxicity was observed only at the highest tested concentration (5 µL/plate).
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- not examined
- Positive controls validity:
- valid
- Additional information on results:
- TEST-SPECIFIC CONFOUNDING FACTORS
- Water solubility: The test item was found to be miscible in distilled water at a concentration of 50 µL/mL.
- Precipitation: The test item resulted in no precipitation at and up to 5 µL/plate.
RANGE-FINDING/SCREENING STUDIES:
- Concentrations tested in the mutation assay were selected based on a solubility and precipitation tests as well as based on an initial cytotoxicity test.
ADDITIONAL INFORMATION ON CYTOTOXICITY:
- Measurement of cytotoxicity used: observation of back background lawn and number of colonies
Any other information on results incl. tables
Table 1: SUMMARY OF COLONY COUNTS OF REVERTANTS OF TRIAL-I Plate Incorporation Method
Treatment |
Test Item Concentration (µL//plate)* |
No. of Revertants (Mean of 3 Plates) |
|||||||||||
With S9 |
|
Without S9 |
|||||||||||
Salmonella typhimurium |
Salmonella typhimurium |
||||||||||||
TA 98 |
TA 100 |
TA 102 |
TA 1535 |
TA 1537 |
TA 98 |
TA 100 |
TA 102 |
TA 1535 |
TA 1537 |
||||
Vehicle Control |
100 µL of Distilled water |
Mean |
26.0 |
107.3 |
260.0 |
22.3 |
10.7 |
19.7 |
100.0 |
257.3 |
19.0 |
10.3 |
|
±SD |
2.6 |
5.9 |
11.5 |
2.5 |
1.5 |
1.5 |
8.2 |
5.5 |
2.0 |
2.5 |
|||
Lawn Intensity |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
|||
Catalyst CR |
0.05 |
Mean |
28.0 |
97.0 |
260.0 |
20.0 |
7.7 |
20.3 |
94.7 |
257.7 |
19.0 |
6.7 |
|
±SD |
2.0 |
4.6 |
8.0 |
3.0 |
2.1 |
4.0 |
4.2 |
3.5 |
3.0 |
2.1 |
|||
Fold Increase |
1.1 |
0.9 |
1.0 |
0.9 |
0.7 |
1.0 |
0.9 |
1.0 |
1.0 |
0.6 |
|||
Lawn Intensity |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
|||
0.16 |
Mean |
27.3 |
97.7 |
266.0 |
20.3 |
9.0 |
19.0 |
96.3 |
257.0 |
16.7 |
9.7 |
||
±SD |
1.5 |
4.7 |
7.9 |
2.5 |
3.0 |
2.6 |
8.4 |
6.6 |
2.1 |
1.5 |
|||
Fold Increase |
1.1 |
0.9 |
1.0 |
0.9 |
0.8 |
1.0 |
1.0 |
1.0 |
0.9 |
0.9 |
|||
Lawn Intensity |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
|||
0.5 |
Mean |
21.0 |
98.0 |
261.0 |
20.3 |
8.3 |
22.0 |
97.7 |
264.3 |
20.0 |
8.7 |
||
±SD |
2.0 |
7.5 |
10.1 |
2.1 |
2.1 |
2.0 |
5.5 |
8.7 |
3.6 |
3.1 |
|||
Fold Increase |
0.8 |
0.9 |
1.0 |
0.9 |
0.8 |
1.1 |
1.0 |
1.0 |
1.1 |
0.8 |
|||
Lawn Intensity |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
|||
1.6 |
Mean |
23.3 |
96.0 |
258.3 |
18.7 |
9.0 |
20.0 |
93.0 |
266.0 |
16.0 |
7.7 |
||
±SD |
3.8 |
5.0 |
8.4 |
2.3 |
2.0 |
2.0 |
2.6 |
12.1 |
2.0 |
3.8 |
|||
Fold Increase |
0.9 |
0.9 |
1.0 |
0.8 |
0.8 |
1.0 |
0.9 |
1.0 |
0.8 |
0.7 |
|||
Lawn Intensity |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
|||
5 |
Mean |
17.3 |
74.7 |
204.7 |
14.0 |
5.0 |
15.7 |
66.3 |
202.0 |
13.7 |
5.0 |
||
±SD |
2.5 |
5.9 |
2.5 |
1.0 |
1.0 |
1.5 |
4.0 |
2.0 |
0.6 |
2.0 |
|||
Fold Increase |
0.7 |
0.7 |
0.8 |
0.6 |
0.5 |
0.8 |
0.7 |
0.8 |
0.7 |
0.5 |
|||
Lawn Intensity |
3+ |
3+ |
3+ |
3+ |
3+ |
3+ |
3+ |
3+ |
3+ |
3+ |
|||
Positive Control |
100 µL of respective Positive Control |
Mean |
376.7 |
391.3 |
602.0 |
143.0 |
122.7 |
348.3 |
383.0 |
592.7 |
142.0 |
121.7 |
|
±SD |
11.2 |
12.7 |
12.5 |
6.2 |
8.1 |
21.8 |
8.9 |
11.5 |
8.7 |
6.7 |
|||
Fold Increase |
14.5 |
3.6 |
2.3 |
6.4 |
11.5 |
17.7 |
3.8 |
2.3 |
7.5 |
11.8 |
|||
Lawn Intensity |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
Values of Revertants are in Mean±SD
*Corrected Concentrations are given. As the test item contains 35 % of water and the test substance that is to be registered only contains 15 % of water a correction factor of 1.31 has been applied.
Positive controls:
For with S9:
ForSalmonella typhimuriumTA98, TA100, TA102, TA1535 and TA1537 = 4 µg/plate of 2-Aminoanthracene
For without S9:
For TA98: 2 µg/plate of 2-Nitrofluorene
For TA100 and TA1535: 1 µg/plate of Sodium azide.
For TA102:0.5µg/plate of Mitomycin C
For TA1537: 50 µg/plate of 9-Aminoacridine
Table 2: SUMMARY OF COLONY COUNTS OF REVERTANTS OF TRIAL-II Preincubation Method
Treatment |
Test Item Concentration (µL//plate) * |
No. of Revertants (Mean of 3 Plates) |
|||||||||||
With S9 |
|
Without S9 |
|||||||||||
TA 98 |
TA 100 |
TA 102 |
TA 1535 |
TA 1537 |
TA 98 |
TA 100 |
TA 102 |
TA 1535 |
TA 1537 |
||||
Vehicle Control |
100 µL of Distilled water |
Mean |
29.3 |
103.0 |
260.7 |
21.7 |
10.0 |
28.0 |
99.7 |
264.3 |
19.7 |
9.7 |
|
±SD |
2.5 |
2.6 |
8.4 |
3.2 |
3.0 |
2.0 |
3.8 |
7.1 |
2.5 |
1.5 |
|||
Lawn Intensity |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
|||
Catalyst CR |
0.05 |
Mean |
24.3 |
97.0 |
264.0 |
19.3 |
8.0 |
21.0 |
96.0 |
262.7 |
17.7 |
8.3 |
|
±SD |
2.1 |
7.5 |
7.5 |
3.1 |
2.0 |
2.6 |
4.6 |
10.2 |
1.5 |
3.2 |
|||
Fold Increase |
0.8 |
0.9 |
1.0 |
0.9 |
0.8 |
0.8 |
1.0 |
1.0 |
0.9 |
0.9 |
|||
Lawn Intensity |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
|||
0.16 |
Mean |
29.7 |
95.7 |
262.0 |
21.0 |
9.0 |
28.7 |
93.3 |
265.7 |
18.7 |
7.3 |
||
±SD |
2.5 |
6.4 |
7.5 |
2.0 |
1.7 |
4.0 |
1.5 |
12.1 |
1.5 |
2.1 |
|||
Fold Increase |
1.0 |
0.9 |
1.0 |
1.0 |
0.9 |
1.0 |
0.9 |
1.0 |
0.9 |
0.8 |
|||
Lawn Intensity |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
|||
0.5 |
Mean |
29.7 |
99.0 |
261.3 |
17.3 |
8.7 |
25.7 |
100.7 |
262.0 |
18.0 |
8.0 |
||
±SD |
4.0 |
6.2 |
8.1 |
2.5 |
2.5 |
4.5 |
2.5 |
8.2 |
3.6 |
2.6 |
|||
Fold Increase |
1.0 |
1.0 |
1.0 |
0.8 |
0.9 |
0.9 |
1.0 |
1.0 |
0.9 |
0.8 |
|||
Lawn Intensity |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
|||
1.6 |
Mean |
23.7 |
97.7 |
267.3 |
20.7 |
6.3 |
24.3 |
93.0 |
263.3 |
17.7 |
6.0 |
||
±SD |
4.0 |
5.0 |
6.0 |
2.5 |
2.1 |
2.5 |
2.6 |
5.1 |
2.5 |
2.0 |
|||
Fold Increase |
0.8 |
0.9 |
1.0 |
1.0 |
0.6 |
0.9 |
0.9 |
1.0 |
0.9 |
0.6 |
|||
Lawn Intensity |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
|||
5 |
Mean |
18.3 |
74.7 |
208.3 |
13.7 |
3.3 |
17.7 |
72.0 |
211.7 |
13.0 |
3.0 |
||
±SD |
3.2 |
5.7 |
7.5 |
1.5 |
0.6 |
2.5 |
3.0 |
11.7 |
1.0 |
1.0 |
|||
Fold Increase |
0.6 |
0.7 |
0.8 |
0.6 |
0.3 |
0.6 |
0.7 |
0.8 |
0.7 |
0.3 |
|||
Lawn Intensity |
3 + |
3 + |
3 + |
3 + |
3 + |
3 + |
3 + |
3 + |
3 + |
3 + |
|||
Positive Control |
100 µL of respective Positive Control |
Mean |
377.3 |
396.7 |
606.7 |
138.3 |
121.3 |
354.3 |
383.7 |
597.7 |
133.7 |
114.7 |
|
±SD |
12.1 |
16.0 |
14.0 |
12.1 |
7.1 |
14.6 |
12.1 |
18.9 |
6.0 |
6.7 |
|||
Fold Increase |
12.9 |
3.9 |
2.3 |
6.4 |
12.1 |
12.7 |
3.8 |
2.3 |
6.8 |
11.9 |
|||
Lawn Intensity |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
4+ |
Values of Revertants are in Mean±SD
*Corrected Concentrations are given. As the test item contains 35 % of water and the test substance that is to be registered only contains 15 % of water a correction factor of 1.31 has been applied.
Positive controls:
For with S9:
For Salmonella typhimurium TA98, TA100, TA102, TA1535 and TA1537 = 4 µg/plate of 2-Aminoanthracene
For without S9:
For TA98: 2 µg/plate of 2-Nitrofluorene
For TA100 and TA1535: 1 µg/plate of Sodium azide.
For TA102:0.5µg/plate of Mitomycin C
For TA1537: 50 µg/plate of 9-Aminoacridine
Applicant's summary and conclusion
- Conclusions:
- The test item is considered to be non-mutagenic in bacteria with and without metabolic activation.
- Executive summary:
The test item was evaluated for mutagenicity in a Bacterial Reverse Mutation Test according to OECD guideline for testing of chemicals No. 471, “Bacterial Reverse Mutation Test”, adopted on 21st July 1997. The test concentrations used in the mutation assay were selected based on the results obtained in the pre-tests. As the test item contains 35% of water and the test substance that is to be registered only contains 15% of water a purity correction factor of 1.31 has been applied. The mutagenic potential of the test item was investigated in two independent experiments, in plate incorporation test (trial 1) and pre incubation test (trial 2). Each assay was conducted with and without metabolic activation (+S9 mix). Both trials were performed at concentrations of 0.05, 0.16, 0.5, 1.6 and 5 µL/plate (corrected concentrations). All concentrations, including the controls, were tested in triplicate. Vehicle control (distilled water) and appropriate positive controls (2-nitrofluorene, sodium azide and 9-Aminoacridine, Mitomycin C for trials without metabolic activation and 2-Aminoanthracene for trials with metabolic activation) were tested simultaneously. The tester strains used in the mutation assay were Salmonella typhimurium TA98, TA100, TA102, TA1535 and TA1537.
In the performed trials all of the validity criteria regarding the investigated strains, vehicle and positive controls, S9 activity and number of investigated analyzable concentration levels were fulfilled. All the tester strains treated with the test item at the concentration of 5µL/plate showed slightly reduced lawn (grade 3+) and a reduction in mean number of revertant colonies/plate in the presence and absence of metabolic activation when compared to the vehicle control. No inhibitory effects of the test item were observed at the concentration ≤ 1.6 µL/plate. There was no substantial increase in number of revertant colonies at any of the tested concentrations in both trials. The number of revertant colonies in the positive controls resulted in 2.3 to 17.7 fold increase under identical conditions. Based on the results obtained from the study, it is concluded that the test item is “non-mutagenic” in the Bacterial Reverse Mutation Test up to the highest tested concentration of 5 µL/plate under the test conditions chosen.
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