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EC number: 282-780-4 | CAS number: 84418-68-8
- 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
Developmental toxicity / teratogenicity
Administrative data
- Endpoint:
- developmental toxicity
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Acceptable, well-documented study performed according to GLP.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 986
- Report date:
- 1986
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 414 (Prenatal Developmental Toxicity Study)
- GLP compliance:
- not specified
- Limit test:
- no
Test material
- Reference substance name:
- Carboxylic acids, C6-8-neo-
- Cas Number:
- 95823-36-2
- IUPAC Name:
- Carboxylic acids, C6-8-neo-
- Details on test material:
- - Name of test material (as cited in study report): MRD-54-616
- Substance type: clear yellow liquid
- Analytical purity: assumed 100% for testing
- Storage condition of test material: room temperature
Constituent 1
Test animals
- Species:
- rat
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: Charles River Breeding Laboratories
- Age at study initiation: 9-11 weeks
- Weight at study initiation: 170-290 g
- Fasting period before study: n/a
- Housing: individually except during mating
- Diet (e.g. ad libitum): certified rodent chow, ad libitum
- Water (e.g. ad libitum): as libitum
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 18-22
- Humidity (%): 40-70%
- Photoperiod (hrs dark / hrs light): 12/12
IN-LIFE DATES: From: To:
Administration / exposure
- Route of administration:
- oral: gavage
- Vehicle:
- unchanged (no vehicle)
- Details on exposure:
- PREPARATION OF DOSING SOLUTIONS:
Administered neat
- Analytical verification of doses or concentrations:
- no
- Details on mating procedure:
- - Impregnation procedure: cohoused
- If cohoused:
- M/F ratio per cage: 1:1
- Length of cohabitation: until observation of copulatory plug
- Duration of treatment / exposure:
- Gestation day 6-15
- Frequency of treatment:
- Daily
- Duration of test:
- gestation
- No. of animals per sex per dose:
- 22
- Control animals:
- yes, concurrent no treatment
Examinations
- Maternal examinations:
- CAGE SIDE OBSERVATIONS: Yes
- Time schedule: gestation days 0, 3, 6, 9, 12, 16, and 20 - Ovaries and uterine content:
- The ovaries and uterine content was examined after termination: Yes
Examinations included:
- Gravid uterus weight: Yes
- Number of corpora lutea: Yes
- Number of implantations: Yes
- Number of early resorptions: Yes
- Number of late resorptions: Yes - Fetal examinations:
- - External examinations: Yes:
- Soft tissue examinations: Yes:
- Skeletal examinations: Yes:
- Head examinations: Yes: - Statistics:
- Yes
- Indices:
- Yes
- Historical control data:
- Yes
Results and discussion
Results: maternal animals
Maternal developmental toxicity
- Details on maternal toxic effects:
- Maternal toxic effects:yes
Details on maternal toxic effects:
Morbidity and Mortality
- 4 animals died in the 800 mg/kg group
Necropsy Observations
- Increased incidences of mottled discoloration of the lung (250, 600, or 800 mg/kg). The increase was not dose-dependent.
Pregnancy Rate
- No adverse effects
Gestation Body Weight
- The 600 and 800 mg/kg dose groups displayed significantly reduced maternal body weights
- Gestation food consumption was also significantly reduced in these dose groups
Uterine Data
For the 800 mg/kg group there were significant increases in mean number of resorptions in the litter and the mean fraction of implantations in the litter which were resorbed. The resorptions were predominately “early”. At 800 mg/kg there were corresponding decreases in the mean number of live fetuses. No full term dead fetuses were found in this study. Dams with greater than 3 resorptions were observed at a significantly elevated incidence at 600 and 800 mg/kg.
Effect levels (maternal animals)
- Dose descriptor:
- NOAEL
- Effect level:
- 250 mg/kg bw/day (actual dose received)
- Basis for effect level:
- other: maternal toxicity
Results (fetuses)
- Details on embryotoxic / teratogenic effects:
- Embryotoxic / teratogenic effects:yes
Details on embryotoxic / teratogenic effects:
Fetal Body Weight and Crown-Rump Distance
- The 800 mg/kg group showed significantly reduced body weight and crown-rump distance of male and female fetuses.
Fetal Malformations
- External malformations were unique to individual fetuses and their incidences were not statistically significant.
- There were statistically significant incidences of hydrocephalus for the 600 and 800 mg/kg groups.
- Examination of fetal skeleton revealed minor and major structural malformations of thoracic ribs in fetuses of the 600 and 800 mg/kg groups.
- Total malformation incidences were significantly increased for the 600 and 800 mg/kg groups when calculated as malformed fetuses/live fetuses.
Fetal Variations
- Variations of skin color, aortic arch, and renal/ureter were noted in the 800 mg/kg group.
Effect levels (fetuses)
- Dose descriptor:
- NOAEL
- Effect level:
- 250 mg/kg bw/day (nominal)
- Basis for effect level:
- other: see remarks
Fetal abnormalities
- Abnormalities:
- not specified
Overall developmental toxicity
- Developmental effects observed:
- not specified
Applicant's summary and conclusion
- Conclusions:
- There was no statistically significant evidence of developmental toxicity at dose levels of 50 or 250 mg/kg.
- Executive summary:
In this study, pregnant rats, n=22 per dose, were treated by oral gavage to 50, 250, 600 or 800 mg/kg/day Neoheptanoic acid during gestation days 6-15. On gestation day 21, the dams were euthanized and the pups were examined for signs of developmental toxicity. Under the conditions of the experimental methods, the test material produced maternal toxicity at dose levels of 600 and 800 mg/kg with maternal lethality at 800 mg/kg. The test material was severely embryotoxic at 800 mg/kg with less than 20% of embryos surviving. Offspring of the 800 mg/kg group had reduced body weight, reduced crown-rump distance, displayed variations signifying delayed development, and a significant percentage (25%) were malformed. In the 600 mg/kg group, there was an increase number of dams with 3 or more resorptions. Offspring of the 600 mg/kg group displayed significant incidences of major (hydrocephalus) and minor (knobby or angular ribs, extra lumbar vertebrae) malformations but showed few signs of delayed development and were not runted. There was no statistically significant evidence of maternal toxicity at dose levels of 50 or 250 mg/kg. There was a slight, but not statistically significant, increase in embryonic resorption noted for the 250 mg/kg group. There was no statistically significant evidence of developmental toxicity at doses for 50 or 250 mg/kg. The NOAEL for maternal toxicity is 600 mg/kg and the NOAEL for developmental toxicity is 250 mg/kg.
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