Octan-1-ol

Repeated dose toxicity: oral

Administrative data

Endpoint:

sub-chronic toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

not stated

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods with acceptable restrictions

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1966

Report date:

1966

Materials and methods

Test guideline

Qualifier:

no guideline followed

Principles of method if other than guideline:

Rats treated via the diet for 90 days with limited evaluation

GLP compliance:

no

Limit test:

no

Test material

Test material information

Constituent 1

Reference substance name:

Hexan-1-ol

EC Number:

203-852-3

EC Name:

Hexan-1-ol

Cas Number:

111-27-3

Molecular formula:

C6H14O

IUPAC Name:

hexan-1-ol

Test material form:

liquid

Test animals

Species:

rat

Strain:

other: albino

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Charles River Breeding Laboratories Inc.
- Age at study initiation: no data but "young"
- Weight at study initiation: males 103.6 g, females 90.5 g
- Fasting period before study: no data
- Housing: individually in suspended wire-mesh cages
- Diet (e.g. ad libitum): Purina Laboratory Chow, ad libitum
- Water (e.g. ad libitum): ad libitum
- Acclimation period: 1 week

ENVIRONMENTAL CONDITIONS
- Temperature (°C): no data but "controlled within narrow limits"
- Humidity (%): no data but "controlled within narrow limits"
- Air changes (per hr): no data
- Photoperiod (hrs dark / hrs light): no data

IN-LIFE DATES: no data

Administration / exposure

Route of administration:

oral: feed

Vehicle:

unchanged (no vehicle)

Details on oral exposure:

DIET PREPARATION
- Rate of preparation of diet (frequency): weekly
- Mixing appropriate amounts with (Type of food): basal laboratory diet (Purina Laboratory Chow)
- Storage temperature of food: no data

Analytical verification of doses or concentrations:

no

Duration of treatment / exposure:

13 weeks

Frequency of treatment:

continuous in diet

Doses / concentrations

Doses / concentrations 1

Dose / conc.:

0.25 other: %

Remarks:

nominal in diet

Doses / concentrations 2

Dose / conc.:

0.5 other: %

Remarks:

nominal in diet

Doses / concentrations 3

Dose / conc.:

1 other: %

Remarks:

nominal in diet

Doses / concentrations 4

Dose / conc.:

2 other: %

Remarks:

nominal in diet

Doses / concentrations 5

Dose / conc.:

4 other: %

Remarks:

nominal in diet

Doses / concentrations 6

Dose / conc.:

6 other: %

Remarks:

nominal in diet

No. of animals per sex per dose:

10 (treated), 20 (controls)

Control animals:

yes, plain diet

Details on study design:

- Dose selection rationale: no data
- Rationale for animal assignment (if not random): no data
- Rationale for selecting satellite groups: no satellite groups

Positive control:

none

Examinations

Observations and examinations performed and frequency:

CAGE SIDE OBSERVATIONS: Yes
- Time schedule: 5 days/week
- Cage side observations included: general physical appearance, gross signs of systemic toxicity and/or pharmacological effect, behaviour, mortality

DETAILED CLINICAL OBSERVATIONS: No

BODY WEIGHT: Yes
- Time schedule for examinations: weekly

FOOD CONSUMPTION AND COMPOUND INTAKE (if feeding study): Yes
- Time schedule for examinations: weekly
- Food consumption for each animal determined and mean daily diet consumption calculated as g food/kg body weight/day: Yes
- Compound intake calculated as mg/kg bw/day: Yes

FOOD EFFICIENCY: No

WATER CONSUMPTION: No

OPHTHALMOSCOPIC EXAMINATION: No

HAEMATOLOGY: Yes
- Time schedule for collection of blood: days 30 and 90
- Anaesthetic used for blood collection: No data
- Animals fasted: No data
- How many animals: 5/sex per group
- Parameters examined: microhaematocrit, haemoglobin, total and differential leukocyte count

CLINICAL CHEMISTRY: No

URINALYSIS: Yes
- Time schedule for collection of urine: days 30 and 90
- Metabolism cages used for collection of urine: No data
- Animals fasted: No data
- How many animals: 5/sex per group (samples pooled)
- Parameters examined: albumin, acetone, bilirubin, colour, occult blood, sugar, pH, appearance, microscopic examination of sediment

NEUROBEHAVIOURAL EXAMINATION: No

Sacrifice and pathology:

GROSS PATHOLOGY: Yes

ORGAN WEIGHTS: brain, thyroid, heart, liver, spleen, kidneys, adrenals, gonads (testes or ovaries)

HISTOPATHOLOGY: Yes
- brain, thyroid, parathyroid, heart, lung, liver, spleen, stomach, small intestine, large intestine, pancreas, kidney, urinary bladder, adrenal, gonad, lymph node, bone, bone marrow
- all listed tissues from 5/sex from high dose and controls examined

Other examinations:

none

Statistics:

Chi-squared test for comparing relative organ weights (but see 'Any other information on materials and methods')

Results and discussion

Results of examinations

Clinical signs:

no effects observed

Mortality:

no mortality observed

Body weight and weight changes:

no effects observed

Food consumption and compound intake (if feeding study):

no effects observed

Food efficiency:

not examined

Water consumption and compound intake (if drinking water study):

not examined

Ophthalmological findings:

not examined

Haematological findings:

no effects observed

Clinical biochemistry findings:

not examined

Urinalysis findings:

no effects observed

Behaviour (functional findings):

not examined

Organ weight findings including organ / body weight ratios:

effects observed, treatment-related

Gross pathological findings:

no effects observed

Histopathological findings: non-neoplastic:

no effects observed

Histopathological findings: neoplastic:

no effects observed

Details on results:

CLINICAL SIGNS AND MORTALITY
- one male in low dose group died during week 9; cause of death was said to be unrelated to treatment
- occasional bloody encrustations of the eyes and nose
- otherwise no effects

BODY WEIGHT
- no effects

FOOD CONSUMPTION AND COMPOUND INTAKE (if feeding study)
- food consumption 87.8% of controls in females in high dose group during week 13
- otherwise no effects

FOOD EFFICIENCY
- not examined

WATER CONSUMPTION
- not examined

OPHTHALMOSCOPIC EXAMINATION
- not examined

HAEMATOLOGY
- no effects other than "occasional aberrant value"

CLINICAL CHEMISTRY
- not examined

URINALYSIS
- high albumin, positive findings for occult blood; but no differences between treated and control groups

NEUROBEHAVIOUR
- not examined

ORGAN WEIGHTS
- some statistically significant effects (but see 'Remarks on results')

GROSS PATHOLOGY
- no effects

HISTOPATHOLOGY: NON-NEOPLASTIC
- no effects

HISTOPATHOLOGY: NEOPLASTIC (if applicable)
- no effects

HISTORICAL CONTROL DATA (if applicable)
- no data

Effect levels

1

Key result

Dose descriptor:

NOAEL

Effect level:

1 127 mg/kg bw/day (actual dose received)

Based on:

test mat.

Sex:

male

Basis for effect level:

other: No adverse effects observed

2

Key result

Dose descriptor:

NOAEL

Effect level:

1 243 mg/kg bw/day (actual dose received)

Based on:

test mat.

Sex:

female

Basis for effect level:

other: No adverse effects observed

Target system / organ toxicity

Critical effects observed:

no

Any other information on results incl. tables

ACTUAL DOSE RECEIVED BY DOSE LEVEL BY SEX (means calculated from individual weekly dietary intake data)
0.25% M 182 mg/kg/day; F 216 mg/kg/day
0.5% M 374 mg/kg/day; F 427 mg/kg/day
1% M 1127 mg/kg/day; F 1243 mg/kg/day

Organ weights: The original report indicates that there were significant differences in some relative organ weights from treated groups compared 

to controls. 

Applicant's summary and conclusion

Conclusions:

In a reliable study, the NOAEL for Alfol 6 in rats following 13 weeks dietary exposure was 1127 mg/kg bw/day for males and 1243 mg/kg bw/day for females (highest doses tested).

Executive summary:

Rats exposed to hexan-1-ol via the diet for 13 weeks showed no signs of significant toxicity when administered at nominal concentrations up to 1% (with staged increases at concentrations up to 6% during the last phase of the exposure period). There were no microscopic alterations recorded in the animals receiving concentrations of 6% (equivalent to 1127 mg/kg/day). Examination of testes and the ovaries did not show any abnormalities.