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EC number: 268-706-3 | CAS number: 68133-79-9
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- 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
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- 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:
- December 13, 2018 - January 18, 2019
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 019
- Report date:
- 2019
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 471 (Bacterial Reverse Mutation Assay)
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 870.5100 - Bacterial Reverse Mutation Test (August 1998)
- GLP compliance:
- yes (incl. QA statement)
- Type of assay:
- bacterial reverse mutation assay
Test material
- Reference substance name:
- 2-(3,7-dimethylocta-2,6-dienyl)cyclopentan-1-one
- EC Number:
- 268-706-3
- EC Name:
- 2-(3,7-dimethylocta-2,6-dienyl)cyclopentan-1-one
- Cas Number:
- 68133-79-9
- Molecular formula:
- C15H24O
- IUPAC Name:
- 2-(3,7-dimethylocta-2,6-dienyl)cyclopentan-1-one
Constituent 1
Method
Species / strain
- Species / strain / cell type:
- S. typhimurium TA 1535, TA 1537, TA 98, TA 100 and E. coli WP2
- Additional strain / cell type characteristics:
- other: rfa mutation, R factor
- Metabolic activation:
- with
- Metabolic activation system:
- S9 derived from male Sprague-Dawley rats (phenobarbital and benzoflavone induced rat liver).
- Test concentrations with justification for top dose:
- 0.8, 1.58, 5.0, 8, 15.8, 50, 80, 158, 500, 1580, and 5000 µg/plate
- Vehicle / solvent:
- - Vehicle(s)/solvent(s) used: DMSO
Controlsopen allclose all
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Positive controls:
- yes
- Positive control substance:
- sodium azide
- methylmethanesulfonate
- other: ICR 191 Acridine
- Positive controls:
- yes
- Positive control substance:
- other: Daunomycin
- Positive controls:
- yes
- Positive control substance:
- other: 2-aminoanthracene
- Details on test system and experimental conditions:
- Plate incorporation mutation assay:
The initial test followed the plate incorporation method, in which the following materials were mixed and poured over the surface of a minimal agar plate:
• 100 µL of the prepared test substance solutions, negative (vehicle) control, or prepared positive control substance
• 500 µL S9 mix or substitution buffer
• 100 µL bacteria suspension (ST or EC)
• 2000 µL overlay agar maintained at approximately 45°C
Plates were prepared in triplicate at each experimental point and uniquely identified. After pouring, plates were placed on a level surface until the agar gelled then inverted and incubated at approximately 37 degrees C until growth was adequate for enumeration (approximately 65 hours). Appropriate sterility control check plates (treated with critical components in the absence of bacteria) were included as a standard procedural check.
Pre-incubation assay:
The confirmatory test employed the pre-incubation modification of the plate incorporation test. The test or control substances, bacteria suspension, and S9/substitution buffer were incubated under agitation for approximately 30 minutes at approximately 37°C prior to mixing with the overlay agar and pouring onto the minimal agar plates before proceeding as described for the initial test. The study design for the confirmatory test, including strains, dose levels etc. was as described above for the initial (main) test.
A supplemental test was performed to clarify results obtained with TA98 and TA1537 in the initial phase of testing. The test utilized the same procedures as the main test with the additional dose levels listed below. Appropriate vehicle and positive controls were included. - Evaluation criteria:
- For each experimental point, the Mutation Factor (MF) was calculated by dividing the mean revertant colony count by the mean revertant colony count for the corresponding concurrent vehicle control group. The mutagenic activity of the test item was assessed by applying the following criteria:
The results were considered positive (i.e., indicative of mutagenic potential) if:
• The results for the test item showed a substantial increase in revertant colony counts, i.e., response MF ≥ 2 for strains TA98, TA100, and WP2 uvrA or MF ≥ 3 for strains TA1535 and TA1537, with mean value(s) outside the laboratory historical control range. Otherwise, results were considered negative.
• The above increase must be dose related and/or reproducible, i.e., increases must be obtained at more than one experimental point (at least one strain, more than one dose level, more than one occasion or with different methodologies).
If the second criterion is not met, the results may be classified as equivocal, and further testing may be appropriate.
A test substance that produces neither a concentration related increase in the number of revertant colonies nor a reproducible substantial increase in revertant colonies is considered to be non-mutagenic in this test system. - Statistics:
- Product Safety Labs calculated means and standard deviations for all quantitative data collected.
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:
- At ≥ 500 µg/plate with S9 and ≥ 1580 µg/plate without S9 in the pre-incubation method.
- Vehicle 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
- Remarks:
- At ≥ 500 µg/plate with and/or without S9 in the plate incorporation method and ≥ 80 µg/plate with and/or without S9 in the pre-incubation method.
- Vehicle 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
- Remarks:
- At 5000 µg/plate with S9 in the plate incorporation method and at ≥ 500 µg/plate with S9 in the pre-incubation method.
- Vehicle 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
- Remarks:
- At ≥ 1580 µg/plate with S9 in the plate incorporation method and ≥ 80 µg/plate with and/or without S9 in the pre-incubation method.
- Vehicle controls validity:
- valid
- Positive controls validity:
- valid
- Key result
- Species / strain:
- E. coli WP2 uvr A
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- no cytotoxicity
- Vehicle controls validity:
- valid
- Positive controls validity:
- valid
- Additional information on results:
- TEST-SPECIFIC CONFOUNDING FACTORS
- Precipitation: No
- Other confounding effects: Individual plate contamination which obscured the count was noted at 500 µg/plate for strain TA 98 in the pre-incubation method without S9.
Any other information on results incl. tables
Mutation Factors
TA 98 |
Main Test |
Main Test |
Confirmatory Test |
Confirmatory Test |
|
-S9 |
+S9 |
-S9 |
+S9 |
DMSO |
1.00 |
1.00 |
1.00 |
1.00 |
1.58 ug/plate |
0.85 |
1.04 |
1.00 |
1.20 |
5 ug/plate |
0.89 |
1.07 |
1.04 |
1.04 |
15.8 ug/plate |
0.81 |
1.11 |
1.00 |
0.96 |
50 ug/plate |
1.11 |
1.04 |
1.04 |
1.04 |
158 ug/plate |
0.85 |
0.86 |
0.92 |
0.74 |
500 ug/plate |
0.89 |
0.96 |
1.00 |
1.08 |
1580 ug/plate |
0.96 |
0.89 |
0.92 |
0.96 |
5000 ug/plate |
0.81 |
0.93 |
0.75 |
0.88 |
Daunomycin 6 ug/plate |
52.15 |
-- |
20.63 |
-- |
2-AA 10 ug/plate |
-- |
155.82 |
-- |
124.48 |
TA100 |
|
|
|
|
DMSO |
1.00 |
1.00 |
1.00 |
1.00 |
1.58 ug/plate |
0.96 |
1.01 |
0.96 |
0.96 |
5 ug/plate |
0.95 |
0.97 |
0.98 |
0.93 |
15.8 ug/plate |
0.96 |
1.01 |
0.96 |
0.96 |
50 ug/plate |
0.96 |
0.98 |
0.89 |
0.96 |
158 ug/plate |
0.90 |
0.90 |
0.87 |
0.91 |
500 ug/plate |
0.88 |
0.90 |
0.89 |
0.88 |
1580 ug/plate |
0.88 |
0.90 |
0.88 |
0.89 |
5000 ug/plate |
0.86 |
0.86 |
0.85 |
0.86 |
Sodium Azide 1.5 ug/plate |
8.14 |
-- |
8.44 |
-- |
2-AA 10 ug/plate |
-- |
36.17 |
-- |
38.73 |
TA1535 |
|
|
|
|
DMSO |
1.00 |
1.00 |
1.00 |
1.00 |
1.58 ug/plate |
0.86 |
0.85 |
0.86 |
0.85 |
5 ug/plate |
0.79 |
0.92 |
1.00 |
1.00 |
15.8 ug/plate |
0.93 |
1.00 |
0.86 |
0.77 |
50 ug/plate |
0.93 |
1.00 |
0.79 |
0.85 |
158 ug/plate |
0.79 |
0.62 |
0.71 |
0.77 |
500 ug/plate |
0.79 |
0.85 |
0.79 |
0.69 |
1580 ug/plate |
0.79 |
0.69 |
0.71 |
0.69 |
5000 ug/plate |
0.64 |
0.69 |
0.71 |
0.69 |
Sodium Azide 1.5 ug/plate |
57.79 |
-- |
58.00 |
-- |
2-AA 10 ug/plate |
-- |
29.08 |
-- |
25.08 |
TA1537 |
|
|
|
|
DMSO |
1.00 |
1.00 |
1.00 |
1.00 |
1.58 ug/plate |
0.92 |
0.82 |
0.82 |
1.00 |
5 ug/plate |
0.83 |
1.00 |
0.82 |
1.00 |
15.8 ug/plate |
0.75 |
0.91 |
0.91 |
0.90 |
50 ug/plate |
0.75 |
1.00 |
0.73 |
0.90 |
158 ug/plate |
0.83 |
0.73 |
0.82 |
0.80 |
500 ug/plate |
0.83 |
0.82 |
0.73 |
0.90 |
1580 ug/plate |
0.75 |
0.73 |
0.73 |
0.90 |
5000 ug/plate |
0.75 |
0.73 |
0.82 |
0.90 |
ICR 191 Acridine 1 ug/plate |
336.08 |
-- |
702.27 |
-- |
2-AA 10 ug/plate |
-- |
42.09 |
-- |
36.70 |
E. coli WP2 uvrA |
|
|
|
|
DMSO |
1.00 |
1.00 |
1.00 |
1.00 |
1.58 ug/plate |
0.93 |
0.91 |
1.00 |
1.02 |
5 ug/plate |
0.88 |
1.23 |
1.07 |
0.88 |
15.8 ug/plate |
0.84 |
0.86 |
1.09 |
0.75 |
50 ug/plate |
0.98 |
0.98 |
0.91 |
0.79 |
158 ug/plate |
0.81 |
0.89 |
0.87 |
0.90 |
500 ug/plate |
0.81 |
1.14 |
0.96 |
0.88 |
1580 ug/plate |
0.98 |
1.00 |
0.69 |
0.75 |
5000 ug/plate |
1.02 |
1.07 |
0.76 |
0.69 |
MMS 2.5 ug/plate |
15.33 |
-- |
9.67 |
-- |
2-AA 10 ug/plate |
-- |
2.43 |
-- |
2.00 |
Applicant's summary and conclusion
- Conclusions:
- Apritone is not mutagenic.
- Executive summary:
In a reverse gene mutation test in bacteria, strains TA98, TA100, TA1535, and TA1537 of Salmonella. Typhimurium and Escherichia coli WP2 uvrA (E. coli, EC) were exposed to 2-(3,7-dimethylocta-2,6-dienyl)cyclopentan-1-one; APRITONE (98.8% purity), using dimethylsulfoxide (DMSO) solvent at concentrations of 0.8, 1.58, 5.0, 8, 15.8, 50, 80, 158, 500, 1580, and 5000mg/plate in the presence and absence of S9 activation. Three plates were used, per dose, per condition.
There was no evidence of precipitation present for any of the strains at the tested concentrations. Individual plate contamination which obscured the count was noted at 500 µg/plate for strain TA 98 in the
pre-incubation method without S9. Toxicity with presence of incomplete lawn was seen for strains TA1535, TA1537, TA98 and TA100 at ≥ 80 µg/plate with and/or without S9 in the plate incorporation and/or pre-incubation method.For all strains, at least five non-toxic dose levels were evaluated; therefore bacterial mutagenicity was adequately assessed.
In conclusion, based on these findings and on the evaluation system used,2-(3,7-dimethylocta-2,6-dienyl)cyclopentan-1-one; APRITONEdid not elicit evidence ofbacterial mutagenicity in the Ames assay.
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