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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Endpoint:
acute toxicity: other routes
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
3 (not reliable)
Rationale for reliability incl. deficiencies:
other: Unsuitable test system

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1978
Report date:
1978

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Acute toxicity study with mice. Application: intraperitoneal; Observation: 14 days
GLP compliance:
no
Limit test:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Methyl benzoylformate
EC Number:
239-263-3
EC Name:
Methyl benzoylformate
Cas Number:
15206-55-0
Molecular formula:
C9H8O3
IUPAC Name:
methyl oxo(phenyl)acetate
Details on test material:
- Physical state: liquid

Test animals

Species:
mouse
Strain:
NMRI
Sex:
male/female
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Weight at study initiation: mean: male: 23,3g; female: 22,7g

Administration / exposure

Route of administration:
intraperitoneal
Vehicle:
CMC (carboxymethyl cellulose)
Remarks:
0,5% aqueous solution with 2-3 drops of cremophor
Doses:
3160, 2150, 1470, 1000, 681, 46,4 mg/kg bw
No. of animals per sex per dose:
5 animals per sex per dose
Control animals:
no
Details on study design:
- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: daily
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight, histopathology

Results and discussion

Effect levels
Sex:
male/female
Dose descriptor:
LD50
Effect level:
2 100 - 3 100 mg/kg bw
Based on:
test mat.
Mortality:
All animals died at the highest dose within 24 hours. At 2150 mg/kg 2 males and 1 females died in the first hour after application. At 1470 mg/kg 1 male and 1 female died 24 hours after application.
Clinical signs:
Animals showed staggering, atonia, narcotic like symptoms, spastical gait, exsiccosis, and loss of pain and corneal reflex.
Body weight:
Normal body weight gain.
Gross pathology:
intra-abdominal adhesion

Applicant's summary and conclusion