Resinoid of Cistus ladaniferus (Cistaceae) obtained from labdanum gum by ethanol extraction

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

08 - 23 August 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

GLP study performed according to OECD Guideline 423 with no deviation

Cross-reference

Reason / purpose for cross-reference:

read-across: supporting information

Reference

Endpoint:

acute toxicity: oral

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

weight of evidence

Reliability:

1 (reliable without restriction)

Justification for type of information:

Resinoid of Cistus ladaniferus (Cistaceae) obtained from labdanum gum by organic solvents extraction and Resinoid of Cistus ladaniferus (Cistaceae) obtained from labdanum gum by ethanol extraction are extracted from the same botanical plant: Cistus ladaniferus (Cistaceae)

Reason / purpose for cross-reference:

read-across source

Preliminary study:

Not applicable

Key result

Sex:

female

Dose descriptor:

LD50

Effect level:

> 5 000 mg/kg bw

Based on:

test mat.

Remarks on result:

other: estimated from the flow chart from OECD Guideline 423 (Appendix 2d)

Mortality:

No mortality occurred during the study.

Clinical signs:

other: No clinical signs related to the administration of the test item were observed during the study.

Gross pathology:

The macroscopic examination of the animals at the end of the study did not reveal treatment related changes.

Other findings:

None

None

Interpretation of results:

GHS criteria not met

Conclusions:

Under the test conditions, the oral LD50 of the test substance is >2000 mg/kg bw in rats. In accordance with OECD Guideline 423, the LD50 cut-off of the test substance may be considered to be higher than 5000 mg/kg bw by oral route in the rat. Therefore it is not classified according to the Regulation (EC) No. 1272/2008 (CLP) and according to the Globally Harmonised System of classification and labelling of chemicals (GHS). Therefore the registered substance is considered as non claissifed

Executive summary:

In an acute oral toxicity study performed according to the OECD Guideline 423 and in compliance with GLP, a single dose of 2000 mg/kg bw of the test substance solubilized in olive oil and heated during 5 minutes at ca. 50°C was given by oral gavage to a group of 6 female Sprague Dawley rats. Animals were then observed for mortality, clinical signs and body weight changes for 14 days, and were all sacrificed for macroscopic examinations.

No mortality occurred during the study. No clinical signs related to the administration of the test item were observed during the study The body weight evolution of the animals remained normal throughout the study. The macroscopic examination of the animals at the end of the study did not reveal treatment related changes.

Rat Oral LD50 >2000 mg/kg bw.

Under the test conditions, the oral LD50 of the test substance is >2000 mg/kg bw in rats. In accordance with OECD Guideline 423, the LD50 cut-off of the test substance may be considered to be higher than 5000 mg/kg bw by oral route in the rat. Therefore it is not classified according to the Regulation (EC) No. 1272/2008 (CLP) and according to the Globally Harmonised System of classification and labelling of chemicals (GHS).

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method)

Version / remarks:

dated 17 December, 2001

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.1 tris (Acute Oral Toxicity - Acute Toxic Class Method)

Deviations:

no

Principles of method if other than guideline:

Not applicable

GLP compliance:

yes (incl. QA statement)

Remarks:

27 April 2017

Test type:

acute toxic class method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Resinoid of Cistus ladaniferus (Cistaceae) obtained from labdanum gum by organic solvents extraction

Molecular formula:

Not applicable

IUPAC Name:

Resinoid of Cistus ladaniferus (Cistaceae) obtained from labdanum gum by organic solvents extraction

Test material form:

solid

Remarks:

brown to brown-red paste

Details on test material:

- Name (as cited in study report): LABDANUM RESINOID / F
- Storage condition of test material: room temperature, darkness, closed container

Test animals

Species:

rat

Strain:

Sprague-Dawley

Sex:

female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Elevage JANVIER LABS, France
- Females (if applicable) nulliparous and non-pregnant: Yes
- Age at study initiation: 8 weeks
- Weight at study initiation: 169-206 g
- Fasting period before study: overnight. Redistributed 4 hours after the test item administration.
- Housing: Animals were housed by group of three in solid-bottomed clear polycarbonate cages with a stainless steel mesh lid.
- Diet (e.g. ad libitum): Foodstuff (ENVIGO – 2016 Teklad Global 16% Protein Rodent Diet), ad libitum
- Water (e.g. ad libitum): Drinking water (tap-water from public distribution system), ad libitum
- Acclimation period: At least 5 days

ENVIRONMENTAL CONDITIONS
- Temperature: 19-25°C
- Humidity: 30-70%
- Air changes: at least 10/hour
- Photoperiod: 12 hours dark / 12 hours light

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

olive oil

Details on oral exposure:

VEHICLE
- Concentration in vehicle: ca. 2000 mg/10 mL
- Amount of vehicle (if gavage): 10 mL/kg bw
- Justification for choice of vehicle: Olive oil was chosen as it produced the most suitable formulation at the requested concentration.

DOSAGE PREPARATION: In the first and second step of the study, 2.0090 g and 2.0098 g of the test item were weighed and Olive oil was added to two 10 mL volumetric flasks. Just before the administration, the preparations were stirred by vortex then magnetically during 5 minutes at approximately 50°C to obtain thick brown solutions.

Doses:

2000 mg/kg bw

No. of animals per sex per dose:

6 female rats

Control animals:

no

Remarks:

Historical data

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Clinical observations and mortality were recorded at 30 min, 1h, 3h, 4h, 24h, 48h after administration of the test item and continued daily during 14 days.. Animals were weighed on day D0 (just before administering the test item) and then on D2, D7, and D14.
- Necropsy of survivors performed: Yes; animals were euthanized with sodium pentobarbital (Dolethal®) on D14 and macroscopic observations were noted.

Statistics:

No data

Results and discussion

Preliminary study:

Not applicable

Effect levels

Key result

Sex:

female

Dose descriptor:

LD50

Effect level:

> 5 000 mg/kg bw

Based on:

test mat.

Remarks on result:

other: estimated from the flow chart from OECD Guideline 423 (Appendix 2d)

Mortality:

No mortality occurred during the study.

Clinical signs:

other: No clinical signs related to the administration of the test item were observed during the study.

Gross pathology:

The macroscopic examination of the animals at the end of the study did not reveal treatment related changes.

Other findings:

None

Any other information on results incl. tables

None

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

Under the test conditions, the oral LD50 of the test substance is >2000 mg/kg bw in rats. In accordance with OECD Guideline 423, the LD50 cut-off of the test substance may be considered to be higher than 5000 mg/kg bw by oral route in the rat. Therefore it is not classified according to the Regulation (EC) No. 1272/2008 (CLP) and according to the Globally Harmonised System of classification and labelling of chemicals (GHS).

Executive summary:

In an acute oral toxicity study performed according to the OECD Guideline 423 and in compliance with GLP, a single dose of 2000 mg/kg bw of the test substance solubilized in olive oil and heated during 5 minutes at ca. 50°C was given by oral gavage to a group of 6 female Sprague Dawley rats. Animals were then observed for mortality, clinical signs and body weight changes for 14 days, and were all sacrificed for macroscopic examinations.

No mortality occurred during the study. No clinical signs related to the administration of the test item were observed during the study The body weight evolution of the animals remained normal throughout the study. The macroscopic examination of the animals at the end of the study did not reveal treatment related changes.

Rat Oral LD50 >2000 mg/kg bw.

Under the test conditions, the oral LD50 of the test substance is >2000 mg/kg bw in rats. In accordance with OECD Guideline 423, the LD50 cut-off of the test substance may be considered to be higher than 5000 mg/kg bw by oral route in the rat. Therefore it is not classified according to the Regulation (EC) No. 1272/2008 (CLP) and according to the Globally Harmonised System of classification and labelling of chemicals (GHS).