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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods with acceptable restrictions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1968

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 401 (Acute Oral Toxicity)
Deviations:
not applicable
GLP compliance:
no
Test type:
standard acute method
Limit test:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Gestonorone caproate
EC Number:
215-010-2
EC Name:
Gestonorone caproate
Cas Number:
1253-28-7
Molecular formula:
C26H38O4
IUPAC Name:
17-acetyl-3-oxoestr-4-en-17-yl hexanoate

Test animals

Species:
mouse
Strain:
not specified
Sex:
female
Details on test animals or test system and environmental conditions:
weight 18 - 20 g

Administration / exposure

Route of administration:
oral: gavage
Vehicle:
CMC (carboxymethyl cellulose)
Remarks:
1.2 g CMC ad 100 ml Aqua dest.
Doses:
4000 mg/kg
No. of animals per sex per dose:
10
Control animals:
no

Results and discussion

Effect levels
Sex:
female
Dose descriptor:
LD50
Effect level:
> 4 000 mg/kg bw
Based on:
test mat.

Any other information on results incl. tables

The single oral administration of a microcristalline suspension of ZK 5623 (gestonorone caproate) to female mice at a dose of 4000 mg/kg caused transient clinical signs (apathy) immediately after administration. All animals were without compound-related clinical signs from Day 2 onwards. 2 of 10 animals showed miliary grey-white spots in the liver. 1 of 10 animals showed miliary grey-white spots in the cortex of the left kidney. Two mesenteric lymph nodes were increased in size.

The acute oral toxicity of ZK 5623 in mice is above 4000 mg/kg body weight.

Applicant's summary and conclusion

Executive summary:

The single oral administration of a microcristalline suspension of ZK 5623 (gestonorone caproate) to female mice at a dose of 4000 mg/kg caused transient clinical signs (apathy) immediately after administration. The LD50 >4000 mg/kg was established after application of gestonoron caproate.