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Administrative data

Endpoint:
acute toxicity: oral
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Cross-referenceopen allclose all
Reason / purpose for cross-reference:
reference to same study
Reference
Endpoint:
acute toxicity: dermal
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
no guideline followed
Principles of method if other than guideline:
Penetration of rabbit skin is estimated by a technique closely akin to the one-day cuff method of Draize and associates, using groups of four male albino New Zealand rabbits weighing 2.5 to 3.5 kg. The fur is removed from the entire trunk by clipping, and the dose is retained beneath an impervious plastic film. Dosages greater than 20 mL/kg cannot be retained in contact with the skin. The animals are immobilized during the 24-hour contact period, after which the film is removed and the rabbits are caged for the subsequent 14-day observation period.
GLP compliance:
no
Test type:
standard acute method
Limit test:
no
Species:
rabbit
Strain:
New Zealand White
Sex:
male
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Weight at study initiation: 2.5 to 3.5 kg
- Housing: The animals are immobilized during the 24-hour contact period, after which the film is removed and the rabbits are caged for the subsequent 14-day observation period.
Type of coverage:
occlusive
Vehicle:
unchanged (no vehicle)
Details on dermal exposure:
TEST SITE
- Type of wrap if used: impervious plastic film

REMOVAL OF TEST SUBSTANCE
- Time after start of exposure: 24 h
Duration of exposure:
24 h
Doses:
not specified
No. of animals per sex per dose:
4
Control animals:
not specified
Details on study design:
- Duration of observation period following administration: 14 days
Statistics:
Based upon mortalities during a 14-day observation period, the most probable LD50 value and its fiducial range are estimated by the method of Thompson using the Tables of Weil.
Sex:
male
Dose descriptor:
LD50
Effect level:
> 10 mL/kg bw
Based on:
test mat.
Key result
Sex:
male
Dose descriptor:
LD50
Effect level:
> 8 100 mg/kg bw
Based on:
test mat.
Mortality:
not specified
Clinical signs:
other: not specified
Gross pathology:
not specified
Other findings:
not specified
Interpretation of results:
GHS criteria not met
Conclusions:
LD50 > 8100 mg/kg bw
Executive summary:

Penetration of rabbit skin is estimated by a technique closely akin to the one-day cuff method of Draize and associates, using groups of four male albino New Zealand rabbits weighing 2.5 to 3.5 kg. The fur is removed from the entire trunk by clipping, and the dose is retained beneath an impervious plastic film. Dosages greater than 20 mL/kg cannot be retained in contact with the skin. The animals are immobilized during the 24-hour contact period, after which the film is removed and the rabbits are caged for the subsequent 14-day observation period. The LD50 was >8100 mg/kg bw.

Reason / purpose for cross-reference:
reference to same study
Reference
Endpoint:
eye irritation: in vivo
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
not specified
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods with acceptable restrictions
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
no guideline available
Principles of method if other than guideline:
Test in the rabbit eye
GLP compliance:
not specified
Species:
rabbit
Strain:
not specified
Irritation parameter:
other: Grading Scheme (see above)
Score:
5
Interpretation of results:
study cannot be used for classification
Conclusions:
The eye irritation potential of test material hexanal was studied in rabbits. Under the test conditions, the test substance hexanal showed a severe burn in rabbit eyes.
Executive summary:

The eye irritation potential of test material hexanal was studied in rabbits. Under the test conditions, the test substance hexanal showed a severe burn in rabbit eyes.

Data source

Referenceopen allclose all

Reference Type:
publication
Title:
Unnamed
Year:
1962
Reference Type:
publication
Title:
Unnamed
Year:
1969

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Single oral dose toxicity was estimated by the gastric intubation of groups of five non-fasted, Carworth-Wistar male rats.
GLP compliance:
no
Test type:
standard acute method
Limit test:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Hexanal
EC Number:
200-624-5
EC Name:
Hexanal
Cas Number:
66-25-1
Molecular formula:
C6H12O
IUPAC Name:
hexanal
Test material form:
liquid
Details on test material:
Hexanal (mixed isomers)
Specific details on test material used for the study:
Hexanal (mixed isomers)

Test animals

Species:
rat
Strain:
Wistar
Sex:
male
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: reared in own colony
- Age at study initiation: 4 - 5 weeks
- Weight at study initiation: 90 - 120 g
- Fasting period before study: none

Administration / exposure

Route of administration:
oral: gavage
Vehicle:
unchanged (no vehicle)
Details on oral exposure:
no details given
Doses:
The dosages are arranged in a logarithmic series differing by a factor of two.
No. of animals per sex per dose:
5
Control animals:
no
Details on study design:
- Duration of observation period following administration: 14 days
Statistics:
Based upon mortalities during a 14-day observation period, the most probable LD50 value and its fiducial range are estimated by the method of Thompson using the Tables of Weil.

Results and discussion

Effect levelsopen allclose all
Sex:
male
Dose descriptor:
LD50
Effect level:
9.51 mL/kg bw
Based on:
test mat.
Remarks on result:
other: fiducial range: 5.84 - 15.5
Key result
Sex:
male
Dose descriptor:
LD50
Remarks:
calculated from mL based on density of hexanal (8.1 mg/mL)
Effect level:
7 703.1 mg/kg bw
Based on:
test mat.
Mortality:
no details given
Clinical signs:
other: no details given
Gross pathology:
no details given
Other findings:
no details given

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
LD50 = 7703.1 mg/kg body weight
Executive summary:

The single oral dose toxicity was estimated by the gastric intubation of groups of five non-fasted, Carworth-Wistar male rats following a standard acute method decsribed in sufficient detail. The LD50 for mixed isomers of hexanal was determined to be 7703.1 mg/kg bw.