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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2018

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
GLP compliance:
yes
Type of method:
differential scanning calorimetry

Test material

Constituent 1
Chemical structure
Reference substance name:
Mercaptamine
EC Number:
200-463-0
EC Name:
Mercaptamine
Cas Number:
60-23-1
Molecular formula:
C2H7NS
IUPAC Name:
mercaptamine
Test material form:
solid: particulate/powder

Results and discussion

Melting / freezing point
Melting / freezing pt.:
ca. 80 °C
Decomposition:
yes
Decomp. temp.:
> 80 °C

Any other information on results incl. tables

An endothermic peak was observed between 50°C and 125°C directly followed by another endothermic effect starting at 125°C.

In order to investigate the nature of the first endothermic effect peak, Experiment 2 was stopped directly after this peak. After the experiment, a grey powder residue remained in the sample container (original colour: white). The change of the colour indicated possible reaction and/or decomposition of the test item in addition to potential melting transition indicated by the endotherm.

Applicant's summary and conclusion

Conclusions:
It was not possible to determine precise melting temperature of mercaptamine as the melting transition could not be adequately distinguighed by the decompostion of the substance.