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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
13 November 2009 to 4 December 2009
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study conducted to GLP in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Principles of method if other than guideline:
The study was conducted according to the above guideline for testing. As the substance was found to decompose before melting the boiling point was calculated using an adaptation of the Stein and Brown method, MPBPWIN version 1.42, ©2000 US Environmental Protection Agency.
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry

Test material

Constituent 1
Chemical structure
Reference substance name:
5-amino-3-methylthiophene-2,4-dicarbonitrile
EC Number:
610-868-8
Cas Number:
52603-48-2
Molecular formula:
C7N3H5S
IUPAC Name:
5-amino-3-methylthiophene-2,4-dicarbonitrile

Results and discussion

Boiling point
Decomposition:
yes
Decomp. temp.:
221.6 °C
Remarks on result:
other: Average decomposition temperature taken from two determinations.

Any other information on results incl. tables

As the test material decomposed during melting, no value for the boiling temperature could be determined experimentally. However, using an adaptation of the Stein and Brown method, MPBPWIN version 1.42, ©2000 US Environmental Protection Agency, the boiling temperature was calculated to be 340°C.

Similar thermographic profiles were obtained using air and nitrogen atmospheres; this indicates that the observed decomposition in both determinations is probably thermal and not oxidative.

An aliquot of the test material was heated in an oil bath and a visual assessment confirmed that the test material decomposed as the test material melted.

A determination at reduced pressure was not performed, as experience has shown that no further useful information is obtained for solid test materials which decompose prior to boiling at atmospheric pressure.

Applicant's summary and conclusion

Conclusions:
The test material has been determined to decompose prior to boiling. A calculated value of boiling temperature gave a result of 613 K.
Executive summary:

In a physico-chemical properties study (0646/0410), the test material was determined to decompose prior to boiling according to Method A2 of Commission Regulation (EC) No 440/2008.A calculated value of boiling temperature gave a result of 613 K.