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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Study period:
1982
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: well documented, comparable to Guideline study, pre-GLP

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1982
Report date:
1982

Materials and methods

Principles of method if other than guideline:
single treatment via gavage
GLP compliance:
no
Remarks:
pre-GLP
Test type:
standard acute method
Limit test:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
4-nitro-o-anisidine
EC Number:
202-588-6
EC Name:
4-nitro-o-anisidine
Cas Number:
97-52-9
Molecular formula:
C7H8N2O3
IUPAC Name:
2-methoxy-4-nitroaniline
Constituent 2
Reference substance name:
PNOA
IUPAC Name:
PNOA

Test animals

Species:
rat
Strain:
Wistar
Sex:
female
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: Winkelmann BOR: WISW (SPF Cpb)
- Age at study initiation: ca. 14 W

- Fasting period before study: 16 h
- Housing: Macrolon Type III
- Diet (e.g. ad libitum): ad libitum
- Water (e.g. ad libitum): ad libitum
- Acclimation period:


ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22+/- 1,5 C
- Humidity (%): 60 +/- 5%
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Route of administration:
oral: gavage
Vehicle:
polyethylene glycol
Details on oral exposure:
Appl. Volume: 20 ml/kg bw
Doses:
100-1000-1500-2000-3100-5000 mg/kg in males
No. of animals per sex per dose:
10
Control animals:
no
Details on study design:
Observations:
Clin. signs
Mortality
Body weighht
Necropsy (random sample)
Statistics:
Probit analysis

Results and discussion

Effect levels
Sex:
male
Dose descriptor:
LD50
Effect level:
ca. 2 000 mg/kg bw
Mortality:
Dose (mg/kg) Moratlity (2-10 d after treatment)
100 0/10
1000 1/10
1500 1/10
2000 5/10
3100 9/10
5000 10/10
Clinical signs:
other: reduced general condition, Sedation, ruffled fur, narcosis, Chromodakryorhea
Gross pathology:
no data

Applicant's summary and conclusion

Interpretation of results:
practically nontoxic
Remarks:
Migrated information Criteria used for interpretation of results: EU
Conclusions:
4-Nitro-2-methoxyaniline was practically non toxic in male rats. The LD50 was 2000 mg/kg bw.