Registration Dossier

Administrative data

Endpoint:
flash point of flammable liquids
Data waiving:
study technically not feasible
Justification for data waiving:
the study does not need to be conducted because the flash point is only relevant to liquids and low melting point solids
the study does not need to be conducted because decomposition occurred during the melting point study
Cross-referenceopen allclose all
Reason / purpose:
data waiving: supporting information
Reference
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
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Qualifier:
according to
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Test material information:
Composition 1
Melting / freezing pt.:
ca. 80 °C
Decomposition:
yes
Decomp. temp.:
> 80 °C

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.

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.
Reason / purpose:
data waiving: supporting information
Reference
Endpoint:
appearance / physical state / colour
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
other: Observation of test substance in GLP report
GLP compliance:
yes
Test material information:
Composition 1
Physical state at 20°C and 1013 hPa:
solid
Form:
solid: particulate/powder
Colour:
White
Substance type:
organic
Conclusions:
Mercaptamine is a white, crystalline powder at 20°C.
Reason / purpose:
data waiving: supporting information
Reference
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)
Deviations:
yes
Remarks:
It was technically not possible to prepare a wetting zone due to high water solubility of the test item.
Qualifier:
according to
Guideline:
EU Method A.10 (Flammability (Solids))
GLP compliance:
yes
Test material information:
Composition 1
Test procedure:
burning rate test: preliminary screening test
Burning time:
121 s
Remarks on result:
ambiguous
Key result
Test procedure:
burning rate test over 100 mm length
Burning time:
> 45 s

   Burning rate test

Test

Time of burning over 100 mm after the pile had burned a distance of 80 mm
[seconds]

1

69

2

55

3

88

4

74

5

68

6

73

Interpretation of results:
not classified based on GHS criteria
Conclusions:
Mercaptamine is not considered highly flammable under the conditions of this test.

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion