Mercaptamine

Flash point

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-reference

Cross-reference 1

Reason / purpose for cross-reference:

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

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

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.

Cross-reference 2

Reason / purpose for cross-reference:

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

Qualifier:

according to guideline

Guideline:

other: Observation of test substance in GLP report

GLP compliance:

yes

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.

Cross-reference 3

Reason / purpose for cross-reference:

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

Qualifier:

according to guideline

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

Guideline:

EU Method A.10 (Flammability (Solids))

GLP compliance:

yes

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.