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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Toxicological information

Acute Toxicity: oral

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Administrative data

Endpoint:
acute toxicity: oral
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1981
Report date:
1981

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 401 (Acute Oral Toxicity)
Deviations:
no
GLP compliance:
no
Test type:
standard acute method
Limit test:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Stearic acid
EC Number:
200-313-4
EC Name:
Stearic acid
Cas Number:
57-11-4
Molecular formula:
C18H36O2
IUPAC Name:
stearic acid
Details on test material:
- Name of test material (as cited in study report): Edenor C 18 98/100 (stearic acid 98-100%)
- Physical state: A solid white substance, crystalline structure
- Analytical purity: 98-100%

Test animals

Species:
rat
Strain:
Wistar
Sex:
male/female
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: Supplied by Winkelmann, Hannover, Germany
- Weight at study initiation: Mean body weights of male and female rats were 170 and 146 g, respectively
- Fasting period before study: 18 hours prior to dosing (feeding only)
- Housing: Same sex-groups of five Wistar rats were housed in type III Makrolon-cages containing soft wood granulated material
- Diet: A standard laboratory animal diet (Altromin for rats)
- Water: ad libitum

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22
- Humidity (%): 45 - 60
- Photoperiod (hrs dark / hrs light): 12 / 12

Administration / exposure

Route of administration:
oral: gavage
Vehicle:
DMSO
Details on oral exposure:
VEHICLE
- Concentration in vehicle: 500 mg/mL
- Amount of vehicle (if gavage): 10 mL/kg bw
- Purity: 99%


MAXIMUM DOSE VOLUME APPLIED: 10 mL/kg bw


Doses:
5000 mg/kg bw
No. of animals per sex per dose:
5
Control animals:
not specified
Details on study design:
- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Clinical observations were performed immediately after dosing and 1, 4 and 24 hours after dosing, then once every 24 hours thereafter for the rest of the observation period. Individual bodyweights were measured immediately prior to dosing and 24 hours after dosing as well as 7 and 14 days after dosing.
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs

Results and discussion

Effect levels
Sex:
male/female
Dose descriptor:
LD50
Effect level:
> 5 000 mg/kg bw
Based on:
test mat.
Mortality:
Female rats: no mortality occurred during the 14 days observation period
Male rats: one animal died on day 13 after dosing, all other animals survived the 14 days observation period
Clinical signs:
other: Clinical signs appeared approximately 20 minutes after dosing. Ruffled fur, strong salivation and very diminished activity. These clinical signs completely subsided within 24 hours after dosing
Gross pathology:
Swelling of the gastric mucosa. Rests of substance in stomach (surviving and death animals)

Applicant's summary and conclusion