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Diss Factsheets
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EC number: 251-932-1 | CAS number: 34316-64-8
- 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
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_toxicological-information.png)
Toxicity to reproduction
Administrative data
- Endpoint:
- toxicity to reproduction
- Remarks:
- other: extended 90 day feeding study with fertility parameters
- Type of information:
- migrated information: read-across based on grouping of substances (category approach)
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Acceptable, well documented published GLP guideline study.
Data source
Reference
- Reference Type:
- publication
- Title:
- The safety of ethyl oleate is supported by a 91-day feeding study in rats
- Author:
- Bookstaff, R.C. et al.
- Year:
- 2 004
- Bibliographic source:
- Regulatory Toxicology and Pharmacology 39: 202–213
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: 1993 FDA draft "Redbook II" guidelines (Toxicological Principles for the Safety Assessment of Direct Food Additives and Color Additives Used in Food).
- Principles of method if other than guideline:
- The purpose of this study was to determine the safety of ethyl oleate (EO) in a 91-day feeding study in Sprague-Dawley rats.
Additionally to the repeated dose toxicity, oestrus cycle and sperm parameters were analyzed. - GLP compliance:
- not specified
- Limit test:
- no
Test material
- Reference substance name:
- Ethyl oleate
- EC Number:
- 203-889-5
- EC Name:
- Ethyl oleate
- Cas Number:
- 111-62-6
- IUPAC Name:
- ethyl octadec-9-enoate
- Details on test material:
- - Name of test material (as cited in study report): Ethyl oleate (EO); 9-octadecenoic acid ethyl ester
- Source: Victorian Chemical, Victoria, Richmond, Australia
- Analytical purity: 80.6%
Constituent 1
Test animals
- Species:
- rat
- Strain:
- Sprague-Dawley
- Sex:
- male/female
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: Charles River Laboratory
- Strain as given in publication: Sprague-Dawley rats [Crl:CD(SD)IGS BR]
- Age at study initiation: approx. 5-6 weeks
- Weight at study initiation: approx. 150–175 g
- Fasting period before study: one night prior to blood collections
- Housing: individually in stainless steel cages
- Diet: AIN-93G diet, ad libitum
- Water: ad libitum
ENVIRONMENTAL CONDITIONS
Temperature and humidity were controlled throughout the duration of the study.
Administration / exposure
- Route of administration:
- oral: feed
- Vehicle:
- other: diet containing high oleic safflower oil (HOSO)
- Details on exposure:
- PREPARATION OF DOSING SOLUTIONS:
The test item was formulated into the diet. For this purpose, the AIN-93G diet was modified to allow incorporation of an additional 10% of test fat (either EO, HOSO, or a combination of the two). The modification involved decreasing overall carbohydrate concentration to allow the incorporation of an additional 10% of test fat without diluting out other nutrients.
The test diets were prepared based on the addition of the EO oil (i.e., the high-dose diets contained 10% of the EO oil), and were not adjusted based on the actual concentration of the EO molecule.
VEHICLE
- Source: High oleic safflower oil (HOSO) was obtained from Columbus Foods Company, Chicago, Illinois. - Details on mating procedure:
- no matings performed
- Analytical verification of doses or concentrations:
- yes
- Details on analytical verification of doses or concentrations:
- Data on test material stability, homogeneity, and diet concentrations showed that the test material was stable over the course of the study, and diet concentrations were homogeneous and within 10% of target (data not shown).
- Duration of treatment / exposure:
- 91 days
- Frequency of treatment:
- daily ad libitum feeding
Doses / concentrationsopen allclose all
- Remarks:
- Doses / Concentrations:
2.0, 3.9, 6.1 g/kg bw/day
Basis:
other: females, mean dose value as calculated from the actual body weight and food consumption data and dietary target concentration of 3.3, 6.7 and 10 % in feed
- Remarks:
- Doses / Concentrations:
1.8, 3.6, 5.5 g/kg bw/day
Basis:
other: males, mean dose value as calculated from the actual body weight and food consumption data and dietary target concentration of 3.3, 6.7 and 10 % in feed
- No. of animals per sex per dose:
- 20
- Control animals:
- yes, concurrent vehicle
Examinations
- Parental animals: Observations and examinations:
- see 7.5.1: Bookstaff, 2004, rat, 90d oral, RL2
- Oestrous cyclicity (parental animals):
- Beginning on the first day of Week 11 and continuing for 21 consecutive days, all females had daily vaginal smears prepared and examined to evaluate the stage of the estrous cycle.
- Sperm parameters (parental animals):
- Parameters examined: testis weight, epididymis weight, sperm count in epididymides, sperm motility, sperm morphology.
At the terminal sacrifice, males were evaluated for sperm viability.
- For motility and morphology assessment, the right vas deferens was excised and immediately placed in a petri dish containing 10 mL of a 1% bovine serum albumin dissolved in phosphate buffered saline. The solution was prewarmed to approximately 38°C. A 3- to 4-min period (minimum to maximum period, respectively) was allowed for the sperm to swim out. Following the swim-out period, a sample of sperm was collected using a 100-micron-deep cannula and immediately loaded into a prewarmed stage of the Hamilton Thorne IVOS automated sperm analyzer. Five fields/animal were selected and stored as digital images. These images were analyzed for percent motility.
- Sperm morphology was assessed with two slides of sperm stained with eosin for each male. A minimum of 200 sperm cells was evaluated.
- For sperm count, the right epididymis was removed and divided in half by cross sectioning through the middle. The tail end caudal section was placed on dry ice, and stored frozen at approximately -60 to -80°C until analysis for total sperm count. - Postmortem examinations (parental animals):
- GROSS PATHOLOGY: all animals were subjected to gross pathological examination
ORGAN WEIGHTS: the following organs were weighed (paired organs weighed together). Organ-to-body weight percentages and organ-to-brain weight ratios were calculated: adrenal (2), pituitary gland, brain, prostate, epididymides (2), spleen, heart, testis (2), kidney (2), thymus, liver, thyroid with parathyroid, ovary (2), uterus.
HISTOPATHOLOGY: histopathology was done in control and high dose group animals.
The following tissues (when present) from each animal, with the exception of testes, were preserved in 10% neutral-buffered formalin and slides prepared for histopathological examination. Testes were preserved in Bouins fixative.
Adrenal (2)
Aorta
Brain (cerebrum, cerebellum, and medulla)
Cecum
Cervix
Colon [proximal and distal (2)]
Duodenum
Epididymis (2)
Esophagus
Eye (2)
Femur with bone marrow (articular surface of
the distal end)
Harderian gland
Heart
Ileum (including Peyers patch)
Jejunum
Kidney (2)
Lacrimal gland (exorbital)
Liver
Lung with mainstem bronchi
Lymph node (mandibular and mesenteric)
Mammary gland (females)
Nasal turbinates
Ovary (2)
Pancreas
Pituitary gland
Prostate
Rectum
Salivary gland [mandibular (2)]
Sciatic nerve
Seminal vesicle (2)
Skeletal muscle (thigh)
Skin
Spinal cord (cervical, thracic, lumbar)
Spleen
Sternum with bone marrow
Stomach (nonglandular and glandular)
Testis [preserved in Bouins fixative for
sacrificed animals (2)]
Thymus
Thyroid with parathyroid
Tissues with macroscopic changes or alterations
(i.e., gross lesions)
Tongue
Trachea
Urinary bladder
Uterus with uterine horns
Vagina
Zymbals gland - Statistics:
- Control versus treated group comparisons (Groups 2 through 4 versus Group 1) were evaluated at the 5.0%, two-tailed probability level. Data for each sex were analyzed separately. If Levene's test for variance homogeneity was not significant (p > 0.05), one-way analysis of variance (ANOVA) was performed on the observed values. If Levene's test was significant (p < 0.05), ANOVA was done on the rank transformed data. Post-hoc Dunnett's t-test was used for control versus treated group mean comparison, incorporating transformations when necessary.
Results and discussion
Results: P0 (first parental generation)
General toxicity (P0)
- Clinical signs:
- no effects observed
- Body weight and weight changes:
- no effects observed
- Food consumption and compound intake (if feeding study):
- no effects observed
- Organ weight findings including organ / body weight ratios:
- no effects observed
- Histopathological findings: non-neoplastic:
- no effects observed
- Other effects:
- effects observed, treatment-related
- Description (incidence and severity):
- Test substance intake: decreased food intake due to lower palatability
Reproductive function / performance (P0)
- Reproductive function: oestrous cycle:
- no effects observed
- Reproductive function: sperm measures:
- no effects observed
- Reproductive performance:
- not examined
Details on results (P0)
There were no treatment-related effects on reproductive capacity as evaluated by female estrous cycle.
REPRODUCTIVE FUNCTION: SPERM MEASURES (PARENTAL ANIMALS)
There were no treatment-related effects on reproductive capacity as evaluated by sperm motility, sperm count, or sperm morphology.
HISTOPATHOLOGY: NON-NEOPLASTIC
Referring to reproduction organs, no histopathological changes of any relevance were reported.
Effect levels (P0)
- Dose descriptor:
- NOAEL
- Remarks:
- fertility
- Effect level:
- 5 500 mg/kg bw/day (actual dose received)
- Sex:
- male/female
- Basis for effect level:
- other: oestrus cyclus in females, sperm characterization in males and histologic examinations (incl. Epididymides, Mammary gland, Ovaries, Prostate, Seminal vesicles, Testes, Thyroid with parathyroid, Uterus with uterine horns and Vagina)
Overall reproductive toxicity
- Reproductive effects observed:
- not specified
Applicant's summary and conclusion
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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