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EC number: 619-057-3 | CAS number: 94667-33-1
- 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 vivo
Administrative data
- Endpoint:
- in vivo mammalian somatic cell study: cytogenicity / bone marrow chromosome aberration
- Remarks:
- Type of genotoxicity: chromosome aberration
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- August to October 1994
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Cross-reference
- Reason / purpose for cross-reference:
- reference to same study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 994
- Report date:
- 1994
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 475 (Mammalian Bone Marrow Chromosome Aberration Test)
- Deviations:
- no
- Principles of method if other than guideline:
- Not applicable.
- GLP compliance:
- yes
- Type of assay:
- chromosome aberration assay
Test material
- Reference substance name:
- bis(decyl)(2-hydroxyethyl)methylazanium propanoate
- EC Number:
- 619-057-3
- Cas Number:
- 94667-33-1
- Molecular formula:
- C29 H62 N O4 . C3 H5 O2
- IUPAC Name:
- bis(decyl)(2-hydroxyethyl)methylazanium propanoate
- Reference substance name:
- alpha.-[2-(Didecylmethylammonio)ethyl]-.omega.-hydroxy-poly(oxy-1,2-ethanediyl) propionate
- IUPAC Name:
- alpha.-[2-(Didecylmethylammonio)ethyl]-.omega.-hydroxy-poly(oxy-1,2-ethanediyl) propionate
- Reference substance name:
- N,N-Didecyl-N-methyl-poly(oxyethyl)ammonium Propionate
- IUPAC Name:
- N,N-Didecyl-N-methyl-poly(oxyethyl)ammonium Propionate
- Reference substance name:
- Bardap 26
- IUPAC Name:
- Bardap 26
- Details on test material:
- Bardap 26 supplied by Lonza Ltd., was described as a straw coloured slightly viscous liquid, and stable at room temperature. The substance was stored in a white opaque plastic jar at room temperature in the dark.
Constituent 1
Constituent 2
Constituent 3
Constituent 4
Test animals
- Species:
- rat
- Strain:
- Sprague-Dawley
- Sex:
- male/female
- Details on test animals or test system and environmental conditions:
- The test animals were male and female Sprague-Dawley rats obtained from Charles River (UK) Ltd. At the start of the main study the males weighed 307-365 g and the females 200-235 g, and were approximately 8-10 weeks old. The rats were acclimatised for a minimum of 5 days, prior to random selection into test groups. They were housed in same-sex groups of up to 5 in solid floor polypropylene cages with woodflake bedding. The were provided with food (Rat and Mouse Expanded Diet No. 1., SDS Ltd., UK.) and mains water ad libitum. Food was removed overnight prior to dosing, and returned approximately 2 hours after dosing. The animal room was maintained at a temperature of 19-23°C, and relative humidity of 53-58%. There were approximately 15 air changes per hour and a 12 hour light/dark cycle.
Administration / exposure
- Route of administration:
- oral: gavage
- Vehicle:
- Arachis oil B.P.
- Details on exposure:
- The test substance was administered orally by gavage in arachis oil B.P. to rats fasted overnight. Dosing solutions were freshly prepared as required. The dose volume in all cases was 10 ml/kg bw.
- Duration of treatment / exposure:
- Single gavage dose
- Frequency of treatment:
- Single gavage dose
- Post exposure period:
- 6, 24 or 48 hours post-dosing
Doses / concentrations
- Dose / conc.:
- 1 000 mg/kg bw/day (actual dose received)
- Remarks:
- actual ingested
- No. of animals per sex per dose:
- 5 males and 5 females
- Control animals:
- yes, concurrent vehicle
- Positive control(s):
- Cyclophosphamide monohydrate (20 mg/kg bw). The positive control group was sacrificed 24 hours aafter treatment.
Examinations
- Tissues and cell types examined:
- Bone marrow
- Details of tissue and slide preparation:
- Animals were injected i.p. with colchicine at 4 mg/kg bw up to 2 hours prior to bone marrow harvest. Animals were killed at the scheduled time (6, 24 or 48 hours post-dosing), and both femurs were extracted. The bone marrow was aspirated into 5 ml of HBSS and centrifuged. The supernatant was removed and the cell pellet resuspended in 0.075 M KCl at room temperature for 15 minutes. The cells were centrifuged and all but 1 ml of the supernatant removed. After resuspension, the cells were fixed by the addition of freshly prepared fixative (methanol/glacial acetic acid, 3:1). The fixative was changed several times and the cells stored at 4°C for at least 4 hours. After storage the cell suspensions were recentrifuged and the fixative removed to leave a sufficient amount of suspension. Several drops of the suspension were dropped onto clean wet slides and dried on a hot plate at ~40°C. When completely dry and cooled, the slides were stained in 5% Giemsa for 10 minutes and rinsed in tap water and distilled water. The slides were mounted in DPX once dry.
Slides were scored blind. Fifty metaphase spreads per rat were examined for chromosomal aberrations. If the cell had 42 or more chromosomes, any gaps, breaks or rearrangements were noted according to the simplified system of Savage (1976). - Evaluation criteria:
- Cytotoxicity: Reduction in mean mitotic index.
Genotoxicity: Increase in chromosome aberration frequency, increase in polyploidy. - Statistics:
- Chi-squared test; Exact test
Results and discussion
Test results
- Key result
- Sex:
- male/female
- Genotoxicity:
- negative
- Toxicity:
- no effects
- Vehicle controls validity:
- valid
- Negative controls validity:
- not examined
- Positive controls validity:
- valid
- Additional information on results:
- There were no reductions in mean mitotic index, however the observation of clinical signs indicates that systemic absorption of the test material had occurred. There were no statistically significant increases in chromosome aberrations or polyploidy.
Any other information on results incl. tables
No clinical signs were observed 1 hour post dosing. There was one premature death in the 24 hour 1000 mg/kg bw test group; this was considered to be due to a technical error and not due to the test material. In the animals sacrificed 6 hours after test substance administration hunched posture, decreased respiratory rate and laboured respiration were observed. In the animals sacrificed 24 and 48 hours after test substance administration the following clinical signs were observed: hunched posture, lethargy, pilo-erection, tiptoe gait, diuresis, decreased respiratory rate, laboured respiration, gasping respiration, noisy respiration, dehydration, diarrhoea, stains around snout, stains around mouth, emaciation and ataxia.
Applicant's summary and conclusion
- Conclusions:
- There was no significant increase in chromosome aberration frequency or in polyploidy, therefore the test substance is not considered to be clastogenic.
- Executive summary:
The potential for Bardap 26 (N,N-Didecyl-N-methyl-poly(oxyethyl)ammonium Propionate in aqueous/alcohol solution) to induce chromosome damage in bone marrow cells was evaluated in vivo according to OECD 475. Male and female Sprague-Dawley rats were administered a single oral gavage dose of 1000 mg/kg bw test substance (controls were dosed with the vehicle, Arachis oil B.P. only). Bone marrow smears were taken, 6, 24 and 48 hours post-dosing. Fifty metaphases per rat were examined for chromosomal aberrations.
Administration of the test substance at 1000 mg/kg resulted in clinical signs of toxicity in the test animals, indicating systemic absorption of the test material had occurred. Bone marrow cells showed no evidence of toxicity. There was no significant increase in chromosome aberration frequency or in polyploidy at any of the three time points, therefore the test substance is not considered to be clastogenic to bone marrow cells in vivo.
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