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Toxicological information

Acute Toxicity: oral

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Administrative data

acute toxicity: oral
Type of information:
experimental study
Adequacy of study:
key study
Study period:
17 August 2005 to 7 September 2005
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study conducted to GLP in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results.

Data source

Reference Type:
study report
Report date:

Materials and methods

Test guidelineopen allclose all
according to guideline
OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method)
according to guideline
EU Method B.1 tris (Acute Oral Toxicity - Acute Toxic Class Method)
GLP compliance:
Test type:
acute toxic class method
Limit test:

Test material

Constituent 1
Reference substance name:
Crude Tall oil
Molecular formula:
Not applicab;le as it is a UVCB.
Crude Tall oil
Test material form:

Test animals

Details on test animals or test system and environmental conditions:
- Strain: CrI:CD(SD)IGS BR
- Age at study initiation: Approximately 8 weeks at the time of administration.
- Weight at study initiation: 174 to 194 g
- Fasting period before study: Yes. The feed was withdrawn the evening before the administration of the test material and was offered again about three hours post administration.
- Housing: Single caging (39 x 23 cm bottom area, 18 cm high) with wire mesh lids.
- Diet (e.g. ad libitum): feed gamma irradiated with 25 kGyCo, ad libitum.
- Water (e.g. ad libitum): Tap water from an automatic watering system, ad libitum.
- Acclimation period: At least 5 days

- Temperature (°C): Average of 22.0 °C
- Humidity (%): Average of 70.6 %
- Air changes (per hr): 12 per hour
- Photoperiod (hrs dark / hrs light): Artificial light from 6 a.m. to 6 p.m.

IN-LIFE DATES: From: 17 August 2005 To: 7 September 2005

Administration / exposure

Route of administration:
oral: gavage
corn oil
Details on oral exposure:
- Amount of vehicle (if gavage): The individual dose volumes were calculated using the bodyweights determined on the day of the administration.
- Justification for choice of vehicle: The test material was not soluble in water.


CLASS METHOD (if applicable)
- Rationale for the selection of the starting dose: As no prior information on the toxicity of the test material was available, a starting dose of 300 mg/kg bodyweight was chosen. The solutions were freshly prepared before dosing and were administered within 20 minutes.
300 and 2000 mg/kg bw
No. of animals per sex per dose:
3 female animals per step (6 animals in total per dose level)
Control animals:
Details on study design:
The test material was administered sequentially to groups of 3 animals per step, using a starting dose of 300 mg/kg. After the initial group of rats had been dosed, a second group of animals received the test material at a dose level of 300 mg/kg.
In the absence of any toxicological effects, the test material was administered to a third group of animals at a dose level of 2000 mg/kg. A fourth and final group of animals then received the test material at the 2000 mg/kg dose level.

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Observations were performed within the periods 0 to 0.5, 0.5 to 1, 1 to 2, 2 to 4 and 4 to 6 hours after administration of the test material and then at least once a day for a total of 2 weeks. Observations included but were not limited to changes in skin, fur, eyes, the occurrence of secretions and excretions, autonomic activity, changes in gait, posture and the presence of convulsions.
Bodyweights were determined before administration, 7 days post administration and 14 days post administration. Body weight gain was calculated for each week of the study, i.e. between 0 and 7 days and between 7 and 14 days following dosing.
- Necropsy of survivors performed: yes. The animals were killed by inhalation of 80 % CO2 + 20 % air and subjected to a necropsy including a gross pathological examination.

Results and discussion

Effect levels
Key result
Dose descriptor:
Effect level:
> 2 000 mg/kg bw
Based on:
test mat.
There were no deaths.
Clinical signs:
other: No signs of systemic toxicity were observed.
Gross pathology:
No abnormalities were noted at necropsy.

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Under the conditions of this study, the acute oral LD50 of the substance was determined to be >2000 mg/kg bw
Executive summary:

The acute oral toxicity potential of the test substance in Sprague-Dawley rats was determined according to OECD Guideline 423 and EU Method B.1 under GLP conditions. The test substance was administered by oral gavage as a solution in corn oil; the dosing was performed sequentially to groups of 3 animals per step using a starting dose of 300 mg/kg bw and 2000 mg/bw as the second dose. The animals were observed for 14 days. There was no mortality and no clinical signs were observed. All animals showed expected gains in bodyweight throughout the observation period. Under the conditions of this study, the acute oral LD50 of the substance in rats was determined to be >2000 mg/kg bw.