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Toxicological information

Repeated dose toxicity: oral

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Administrative data

Endpoint:
sub-chronic toxicity: oral
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The reliability is assessed as 2 becasue of its use for read across. In addition: the study is non-GLP and predating current guidelines but is similar to OECD TG 408. It has been published in a peer reviewed journal.

Data source

Reference
Reference Type:
publication
Title:
Food Flavourings and Compounds of Related Structure. II. Subacute and Chronic Toxicity
Author:
Hagan EC. et al
Year:
1967
Bibliographic source:
Fd Cosmet. Toxicol. Vol 5, pp. 141-157. Pergamon Press 1967.

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 408 (Repeated Dose 90-Day Oral Toxicity in Rodents)
GLP compliance:
no
Limit test:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
other: liquid
Details on test material:
- Name of test material (as cited in study report): Terpinyl Acetate

Test animals

Species:
rat
Strain:
Osborne-Mendel
Sex:
male/female
Details on test animals and environmental conditions:
TEST ANIMALS
- Housing: Individually in wire cages
- Diet: Ad libitum
- Water: Ad libitum

Administration / exposure

Route of administration:
oral: feed
Vehicle:
unchanged (no vehicle)
Analytical verification of doses or concentrations:
yes
Details on analytical verification of doses or concentrations:
7% loss of food flavouring during a 7-day period
Duration of treatment / exposure:
20 weeks
Frequency of treatment:
Fresh diets were made and distributed weekly
Doses / concentrations
Remarks:
Doses / Concentrations:
1000, 2500, 10000 ppm (corresponding to 40, 100 and 400 mg/kg bw)
Basis:
nominal in diet
No. of animals per sex per dose:
10
Control animals:
yes, concurrent no treatment

Examinations

Observations and examinations performed and frequency:
The rat's weight, food intake and general condition were recorded every week. Haematological examinations were made at termination
Sacrifice and pathology:
At the termination of the experiments the rats were sacrificed and exsanguinated. The tissues of all the rats were examined macroscopically at the time of sacrifice. The viscera were removed and the liver, kidneys, spleen, heart, and testes were weighed. These organs, the remaining abdominal and thoracic viscera, and one hind leg, for bone, bone marrow, and muscle, were preserved in 10 % buffered formalin-saline solution for histopathological
examination. For routine histopathology, sections were embedded in paraffin wax and stained with haematoxylin and eosin. Detailed microscopic examinations in the subacute studies were generally done on 6 or 8 rats, evenly divided by sex, from the high dose group and the control group. If changes attributable to the test compound were found in the high dose group, additional animals on lower dosage levels were examined as indicated.

Results and discussion

Results of examinations

Details on results:
No effect on growth or haematology, and no macroscopic or microscopic change in the tissues in the 10000 ppm exposure group.
No effect on growth or haematology, and no macroscopic change in the tissues in the 2500 and 1000 ppm exposure groups. No microscopic examination performed.

Effect levels

Dose descriptor:
NOAEL
Effect level:
>= 314 mg/kg bw/day (actual dose received)
Based on:
other: alpha-Terpinyl Acetate converted to alpha-Terpineol
Sex:
male/female

Target system / organ toxicity

Critical effects observed:
not specified

Applicant's summary and conclusion

Conclusions:
For alpha-Terpinyl Acetate no effects were observed in a 20 week repeated dose toxicity study in rats at the tested concentrations (up to 10000 ppm).
Executive summary:

Alpha-Terpinylacetate has been tested in a similar to OECD TG 408 guideline. In a 20 weeks oral exposure study Osborne-Mendel rats (10/dose/sex) were administered alpha-Terpinyl Acetate via diet intake at concentrations of 0 (control), 10000, 2500 and 1000 ppm. Animals were then observed for mortality, weight, food intake and general condition. Haematological examinations were made at termination. At the termination of the experiments the rats were sacrificed and exsanguinated. The tissues of all the rats were examined macroscopically at the time of sacrifice. The viscera were removed and the liver, kidneys, spleen, heart, and testes were weighed. Detailed microscopic examinations in the subacute studies were generally done on 6 or 8 rats, evenly divided by sex, from the high dose group and the control group. No effect on growth or haematology, and no macroscopic or microscopic change in the tissues in the 10000 ppm exposure group were observed. No effect on growth or haematology, and no macroscopic change in the tissues in the 2500 and 1000 ppm exposure groups. No microscopic examination was performed on rats exposed to 2500 and 10000 ppm. For the conversion from ppm to mg/kg bw a factor of 25 was used, resulting in a NOAEL > 400 mg/kg bw. This value can be converted to alpha-Terpineol which results in 314 mg/kg bw (using the molecular weight of both substances: 154/196)