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EC number: 204-658-1 | CAS number: 123-86-4
- 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

Repeated dose toxicity: oral
Administrative data
- Endpoint:
- sub-chronic toxicity: oral
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Guideline Study (EPA OTS 798.2650), but as read-across from supporting substance maximum reliability is 2 Read-across hypothesis: for details please see read-across report in section 13
Data source
Referenceopen allclose all
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 986
- Reference Type:
- secondary source
- Title:
- n-Butanol (CAS No. 71-36-3)
- Author:
- ECETOC
- Year:
- 2 003
- Bibliographic source:
- ECETOC JACC No. 41, ISSN-0773-6339-41, December 2003
- Reference Type:
- secondary source
- Title:
- OECD SIDS n-Butyl Alcohol
- Author:
- OECD
- Year:
- 2 001
- Bibliographic source:
- OECD SIDS, UNEP Publications
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EPA OTS 798.2650 (90-Day Oral Toxicity in Rodents)
- Principles of method if other than guideline:
- Four groups of male and female rats (30/sex/group) were administered daily by gavage 0, 30, 125 or 500 mg/kgbw/d for either 6 or 13 weeks.
- GLP compliance:
- yes
- Limit test:
- no
Test material
- Reference substance name:
- Butan-1-ol
- EC Number:
- 200-751-6
- EC Name:
- Butan-1-ol
- Cas Number:
- 71-36-3
- Molecular formula:
- C4H10O
- IUPAC Name:
- butan-1-ol
- Details on test material:
- - Name of test material (as cited in study report): normal butanol
- Lot/batch No.: #3597 KVVE
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 Breeding Laboratories, Inc., Portage, Michigan, U.S.A.
- Age at study initiation: 36-37 d
- Mean weight at study initiation: males 90 g, females 86 g
- Housing: individually
- Diet (e.g. ad libitum): Purina Certiofied Rodent Laboratory Chow #5002 (pellet)
- Water (e.g. ad libitum): filtered municipal water
- Acclimation period: 7 days before the pretreatment week
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 21 +/- 1
- Humidity (%): 48 +/- 9
- Photoperiod (hrs dark / hrs light): 12:12
Administration / exposure
- Route of administration:
- oral: gavage
- Vehicle:
- water
- Details on oral exposure:
- PREPARATION OF DOSING SOLUTIONS:
Dosing solutions of butanol in deionized water were used.
VEHICLE
- Concentration in vehicle: not specified
- Amount of vehicle (if gavage): 10 ml/kg was the constant dosing volume - Analytical verification of doses or concentrations:
- yes
- Details on analytical verification of doses or concentrations:
- GC-FI
- Duration of treatment / exposure:
- 6 (interim sacrifice) or 13 weeks
- Frequency of treatment:
- daily
Doses / concentrations
- Remarks:
- Doses / Concentrations:
0, 30, 125, 500 mg/kg bw
Basis:
actual ingested
- No. of animals per sex per dose:
- 30 (further 10 were sacrificed prior to dosing for determination of clinicopathological baseline levels)
- Control animals:
- yes, concurrent vehicle
- Positive control:
- no data
Examinations
- Observations and examinations performed and frequency:
- CAGE SIDE OBSERVATIONS: Yes
- Time schedule: twice daily
DETAILED CLINICAL OBSERVATIONS: Yes
- Time schedule: twice daily
BODY WEIGHT: Yes
- Time schedule for examinations: Body weights were recorded weekly
FOOD CONSUMPTION: Yes
-Time schedule: Food consumption was recorded weekly
OPHTHALMOSCOPIC EXAMINATION: Yes
- Time schedule for examinations: Ophthalmic examination was conducted prior to treatment and during week 13 before final necropsy.
- Dose groups that were examined: no data
HAEMATOLOGY: Yes
- Time schedule for collection of blood: before the start of the study, during week 6 and during week 13
- Anaesthetic used for blood collection: No data
- Animals fasted: No data
- How many animals: 10 males and 10 females
- parameters: hemoglobin ( HGB), hematocrit (PCV), erythrocyte count (RBC), mean cell volume (MCV), mean cell hemoglobin (MCH),mean cell hemoglobin concentration (MCHC) total and differential leucocyte counts (WBC), estimated platelet count (PLT)
CLINICAL CHEMISTRY: Yes
- Time schedule for collection of blood: before the start of the study, during week 6 and during week 13
- Animals fasted: No data
- How many animals: 10 males and 10 females
- parameters: alkaline phosphatase (Alk phos) blood urea nitrogen (BUN), glutamate pyruvate transaminase (SGPT), glutamate oxalacetate transaminase (SGOT), glucose (Gluc), total protein (TP), albumin (Alb), A/G ratio (calculated), globulin (calculated), total bilirubin (Tot. bili.), sodium (Na), potassium (K ), chloride (Cl), calcium (Ca), inorganic phosphate (Phos), carbon dioxide (TCO2), total serum cholesterol (Chol), creatinine.
URINALYSIS: Yes
- Time schedule for collection of urine: before the start of the study, during week 6 and during week 13
- Metabolism cages used for collection of urine: No data
- Animals fasted: No data
- parameters: pH, specfic gravity, glucose, protein, ketones, bilirubin, urobilinogen, microscopy of sediment
NEUROBEHAVIOURAL EXAMINATION: No data - Sacrifice and pathology:
- GROSS PATHOLOGY: Yes: Ten male and ten female rats from each group were necropsied on study days 43 to 44 and the remaining animals on study days 92 to 93. Gross pathology of all animals was assessed and organs from animals necropsied on study days 92 to 93 were weighed.
HISTOPATHOLOGY: Yes: A complete histopathological investigation was made of all animals of the control and high-dose groups. In the low and mid-dose groups, histopathology included the liver, kidney, and heart from all animals and all gross lesions. All animals found dead or killed in extremis were also microscopically examined. - Statistics:
- Bartlett's test for homogeneity (body weight, food consumption, clinicopathologic and organ weight); Dunnett's test for homogeneous and Gill's test for non homogeneous data to test for statistical significance
Results and discussion
Results of examinations
- Details on results:
- CLINICAL SIGNS AND MORTALITY
Ataxia and hypoactivity (lasting less than 1 h) were observed 2 to 3 minutes after dosing in both sexes of the high-dose group (500 mg/kg bw/d) during the final 6 weeks of dosing. Such ataxia and hypoactivity are typically seen following high oral doses of alcohols. The rapid induction/remission of these effects and the reported increased incidence after the interim kill may be due to the fact that personnel were able to collect post-dose observations more quickly since fewer animals required dosing.
No significant changes between treated groups and controls were observed concerning mortality (three rats were found dead or sacrificed in extremis, but these deaths could not be attributed to the test article.).
BODY WEIGHT AND WEIGHT GAIN
no significant changes between treated groups and controls were observed
FOOD CONSUMPTION
no significant changes between treated groups and controls were observed
OPHTHALMOSCOPIC EXAMINATION
no significant changes between treated groups and controls were observed
HAEMATOLOGY
At the interim clinical pathological evaluation, red blood cell count (RBC) packed cell volume (PCV), and hemoglobin (HGB) averages of the 500 mg/kg/day dose group females were 5% below control averages. Although these differences were statistically significant, they were small and no differences between the parameters were observed in the males of the interim evaluation or between control and treated groups of either sex at the final evaluation. Therefore, even if the lower red blood cell parameters in the 500 mg/kg/day females were an actual treatment-related effect, it was small and transitory and thus not considered as adverse.
CLINICAL CHEMISTRY
no significant changes between treated groups and controls were observed
URINALYSIS
no significant changes between treated groups and controls were observed
ORGAN WEIGHTS
no significant changes between treated groups and controls were observed
GROSS PATHOLOGY
no significant changes between treated groups and controls were observed
HISTOPATHOLOGY: NON-NEOPLASTIC
no significant changes between treated groups and controls were observed
Effect levels
open allclose all
- Dose descriptor:
- NOAEL
- Effect level:
- 125 mg/kg bw/day (nominal)
- Sex:
- male/female
- Basis for effect level:
- other: no effects observed
- Dose descriptor:
- LOAEL
- Effect level:
- 500 mg/kg bw/day (nominal)
- Sex:
- male/female
- Basis for effect level:
- other: clinical signs of CNS depression (ataxia and hypoactivity)
Target system / organ toxicity
- Critical effects observed:
- not specified
Applicant's summary and conclusion
- Conclusions:
- Oral application of n-butanol to rats (0, 30, 125, 500 mg/kg bw/d) in a 90-day toxicity study caused CNS effects in the highest dose group (ataxia and hypoactivity). The NOAEL in this study is 125 mg/kg bw/d.
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