Registration Dossier

Administrative data

Endpoint:
thermal stability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
26 October 1993 - 16 March 1994
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1994
Report Date:
1994

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 113 (Screening Test for Thermal Stability and Stability in Air)
Deviations:
no
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Test material: Simazine (technical)
- Appearance: White powder
- Batch No.of test material: 381 ref 765
- Expiration date of the batch: Two years from date of manufacture
- Purity: 97.8%

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: In the dark at 4°C

Results and discussion

For thermal stability study

Test substance thermally stable:
yes
Operating temperatureopen allclose all
Operating temp.:
>= 227 - <= 233 °C
Remarks on result:
other: Melting range
Operating temp.:
>= 233 - <= 244 °C
Remarks on result:
other: Decomposition range
Sublimation:
no
Transformation products:
no

Any other information on results incl. tables

A crucible containing the test substance was opened immediately after the melting range and was found to contain a brown residue.

Applicant's summary and conclusion

Conclusions:
The test substance, Simazine (technical) is considered to be thermally stable at room temperature as no decomposition or chemical transformation occurred below 150°C. Melting occurs in the range 227.0 - 233.0°C followed immediately by decomposition in the range 233.0 - 244.0°C.