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EC number: 403-360-0 | CAS number: 42405-40-3 BONTRON E-84; E-84
- 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
Acute Toxicity: oral
Administrative data
- Endpoint:
- acute toxicity: oral
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From 6th September to 19th November 1985
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Study is conducted by recognised test house, to experimental procedure in compliance with OECD Guideline 401. Full data set and rationale provided. GLP compliance not specified, although report is subject to Quality Assurance Procedure.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 986
- Report date:
- 1986
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 401 (Acute Oral Toxicity)
- Deviations:
- no
- GLP compliance:
- not specified
- Remarks:
- No mention of GLP is made within the report; however the report was subject to Quality Assurance at the laboratory where the testing was conducted. As such, it is assumed that the principles of GLP were followed
- Test type:
- standard acute method
- Limit test:
- no
Test material
- Reference substance name:
- Bis(3,5-bis(1,1-dimethylethyl)-2-hydroxybenzoato-O1,O2)zinc
- EC Number:
- 403-360-0
- EC Name:
- Bis(3,5-bis(1,1-dimethylethyl)-2-hydroxybenzoato-O1,O2)zinc
- Cas Number:
- 42405-40-3
- Molecular formula:
- C30H42O6Zn
- IUPAC Name:
- bis(3,5-bis(1,1-dimethylethyl)-2-hydroxybenzoato-O1,O2)zinc
- Details on test material:
- - Name of test material (as cited in study report): Bontron E-84
- Substance type: Solid
- Physical state: White powder
- Lot/batch No.: No batch number is specified within the report, but the test substance is deemed equivalent based on history of manufacture and use.
- Stability under test conditions: Not determined.
- Storage condition of test material: Ambient Conditions.
- Other:
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: Interfauna UK Ltd, Huntingdon, Cambs, England
- Age at study initiation: 4 to 6 weeks
- Weight at study initiation: 95 to 156 g
- Fasting period before study: Overnight and 4 hours following dosing
- Housing: Housed in groups by sex in metal cages with wire mesh floors
- Diet (e.g. ad libitum): standard laboratory rodent diet (Labsure LAD 1) ad libitum. Batch diet used for the study is analysed for certain chemical and microbiological contaminants
- Water (e.g. ad libitum): Provided ad libitum. Results of routine chemical examination of water at source (Grafham Final Water) as conducted quarterly by the Anglian Water Authority are made available.
- Acclimation period: 5 days
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20 – 24 °C
- Humidity (%): 63%
- Air changes (per hr): Approximately 15 air changes/hour
- Photoperiod (hrs dark / hrs light): Controlled by means of a time switch to 12 hours artificial light in each 24 hour period.
IN-LIFE DATES: From: 6th September 1985 To: 19th November 1985
Administration / exposure
- Route of administration:
- oral: gavage
- Vehicle:
- other: 1% methyl cellulose
- Details on oral exposure:
- The appropriate dose volume of the test substance was administered to each rat using a syringe and plastic catheter.
VEHICLE
- Concentration in vehicle: Test substance was prepared as various w/v concentrations in 1% methylcellulose and administered at a volume not exceeding 32 ml/kg
- Amount of vehicle (if gavage): Various
- Justification for choice of vehicle: Not specified
- Lot/batch no. (if required): Not specified
- Purity: Not specified
MAXIMUM DOSE VOLUME APPLIED: No exceeding 32ml/kg
DOSAGE PREPARATION (if unusual):
CLASS METHOD (if applicable)
- Rationale for the selection of the starting dose: N/A - Doses:
- Initial: 5000 mg/kg
Main study first phase: 2000 mg/kg, 3200 mg/kg, 5000 mg/kg, 8000 mg/kg
Main study second phase: 500 mg/kg, 1000 mg/kg, 2500 mg/kg
Final range: 500 mg/kg, 500 mg/kg, 1260 mg/kg, 2000 mg/kg - No. of animals per sex per dose:
- Initial: 10 test (5 male, 5 female)
Main study first phase: 10 test (5 male, 5 female) per dose group
Main study second phase: 4 test (2 male, 2 female)
Final range: 10 test (5 male, 5 female) - Control animals:
- no
- Details on study design:
- Sections of the study were conducted on the following dates:
Initial: 1985-09-06
Main study first phase: 1985-10-17, 1985-10-18
Main study second phase: 1985-10-28
Final range: 1985-11-05
Results
A single group of rats (5 male, 5 female) were treated at 5000 mg/kg on 1985-09-06. Three of the ten rats died.
When further groups of ten rates were treated at 2000 mg/kg, 3200 mg/kg, 5000 mg/kg, 8000 mg/kg on 1985-10-17, 1985-10-18, thirty seven of the forty animals died.
In view of these mortalities, smaller groups of rats (two males and two females) were dosed at 500 mg/kg, 1000 mg/kg, 2500 mg/kg on 1985-10-28 in order to establish the expected region of toxicity. This was followed on 1985-11-05 by dosing further groups of ten rats (five males and five females) at 500 mg/kg, 500 mg/kg, 1260 mg/kg, 2000 mg/kg bodyweight.
Mortality data obtained from the groups of ten rats dosed on 1985-10-17, 1985-10-18 and 1985-11-05 were used for the LD50 determination.
- Duration of observation period following administration: 14 days (or other?): 15 days
- Frequency of observations and weighing:
Animals were observed soon after dosing and then at frequent intervals for the remainder of Day 1. On subsequent days, the animals were observed at least twice, once in the morning and once at the end of each experimental day. This latter observation was made at approximately 1130 hours on Saturday and Sunday. Clinical observations were recorded at each observation.
The animals on the study carried out on 1985-10-28 were observed for 5 days after dosing, and all other animals were observed for 14 days after dosing. In each instance, the following were recorded:
1) Approximate time of death of individual rats.
2) The nature, severity and approximate time of onset and duration of each toxic sign.
3) On main study, individual bodyweights of rats on Days 1 (day of dosing), 8 and 15 and at death.
- Necropsy of survivors performed: Yes
- Other examinations performed: clinical signs, body weight,organ weights, histopathology, other:
Surviving animals were killed on Days 6 or 15 by cervical dislocation. All animals that died during the study and those killed on Day 6 or 15 were subjected to a macroscopic post mortem examination which consisted of opening the abdominal and thoracic cavities. The macroscopic appearance of abnormal organs when present was recorded. - Statistics:
- LD50 to male and female rats was calculated using mortality data obtained from rats doses on the dates of 1984-10-17, 1985-10-18 and 1985-11-05 according to the method of Finney (1971) Probit Analysis (3rd Edition) Cambridge University Press.
Seperate LD50 values of males and females were estimated by undertaking probit analysis on the mortality data by fitting two parallel lines on the data (males only and females only) using the technique described by Finney (1978, Statistical Method in Biological Assay, 3rd Edition, Charles Griffin, London). A chi-squared test was carried out to check that the data did not contain any evidence of non-parallelism.
Results and discussion
Effect levelsopen allclose all
- Sex:
- male
- Dose descriptor:
- LD50
- Effect level:
- 1 800 mg/kg bw
- 95% CL:
- >= 1 300 - <= 2 400
- Sex:
- male/female
- Dose descriptor:
- LD50
- Effect level:
- 1 800 mg/kg bw
- 95% CL:
- >= 1 400 - <= 2 200
- Sex:
- female
- Dose descriptor:
- LD50
- Effect level:
- 1 700 mg/kg bw
- 95% CL:
- >= 1 200 - <= 2 400
- Mortality:
- Mortalities occured amongst the rats dosed at 1260 mg/kg and above within 1 and 47 hours of dosing. Please refer to Table 2 in the attached data below for details of times of death.
- Clinical signs:
- Signs of reaction to treatment observed shortly after doing in all rats were pilo-erection and lethargy. These were accompanied by:
a) Abnormal body carriage (hunched posture), abnormal gait (waddling) decreased respiratory rate and pallor of the extremities amongst rats from all groups.
b) Increased salivation in all female rats dosed at 5000 mg/kg and two female rats dosed at 8000 mg/kg.
c) A comatose-like condition amongst rats dosed at 2000 mg/kg and above
d) Gasping in one female rate dosed at 5000 mg/kg and one female rat dosed at 8000 mg/kg.
e) Noisy respiration in one female rat at 5000 mg/kg and two female rats dosed at 8000 mg/kg.
Recovery, as judged by external appearance and behaviour was apparently complete by Day 5
Please refer to Table 3 in the attached report for further information. - Body weight:
- Bodyweight losses were recorded from the majority of rats that died during the study.
Bodyweight gains were recorded from days 8 to 15 for all surviving rats.
Please refer to Table 4 in the attached report for further information. - Gross pathology:
- For rats that died during the study, autopsy revealed pallor of the kidneys in five rats and pallor of the spleen in four rats. Occasional incidences of haemorrhagic lungs, pallor and patchy livers and pale lngs were also observed.
In surviving rats, terminal autopsy results were normal. - Other findings:
- Other observations:
One of the animals dosed at 8000 mg/kg bodyweight had a white suspension in the thoracic cavity at autopsy. Death was considered to be associated with an intubation error and this animal was excluded from the LD50 determination.
No treatment related differences in organ weights, histopathology or target organs were identified.
Any other information on results incl. tables
The LD50 and the associated 95% confidence limits for rats was estimated to be :
Males and females combined: 1800 (1400 to 2200) mg/kg bodyweight.
Males only: 1800 (1300 to 2400) mg/kg bodyweight.
Females only: 1700 (1200 to 2400) mg/kg bodyweight.
The slope of the probit line used in the calculation was 4.0 with a standard error of 0.8 using log transformation of dose in al cases. The heterogenicity factor was not significant. A chi-squared test for parallelism gave no evidence of non-parallelism.
Applicant's summary and conclusion
- Interpretation of results:
- harmful
- Remarks:
- Migrated information Criteria used for interpretation of results: EU
- Conclusions:
- Based on the results, this substance is classified at "Harmful" by oral ingestion, and the risk phrase "R22 : Harmful if swallowed" shall be applied.
- Executive summary:
The substances was tested according to the OECD 401 method to assess the acute oral toxicity of the material in male and female rats (5 of each sex). Based on results of exposure of the substance the LD50 of the substance has been determined to be 1800mg/kg bodyweight
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