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Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017-08-11 - 2018-04-06
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

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

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
1998
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry

Test material

Constituent 1
Reference substance name:
Acetamide, N-(2,4-dinitrophenyl)-, reaction products with 1-methyl-2,4-dinitrobenzene and sodium sulfide (Na2(Sx)), leuco derivatives
EC Number:
288-896-1
EC Name:
Acetamide, N-(2,4-dinitrophenyl)-, reaction products with 1-methyl-2,4-dinitrobenzene and sodium sulfide (Na2(Sx)), leuco derivatives
Cas Number:
85940-08-5
Molecular formula:
not applicable
IUPAC Name:
Reaction product of N-(2,4-dinitrophenyl)acetamide with 1-methyl-2,4-dinitrobenzene and polysulfide, leuco derivatives
Test material form:
solid: particulate/powder
Details on test material:
Test item: Leuco Sulphur Brown 46
Appearance: Brown powder
CAS No: 85940-08-5

Results and discussion

Melting / freezing point
Key result
Atm. press.:
991 hPa
Decomposition:
yes
Decomp. temp.:
ca. 270 °C
Remarks on result:
other:
Remarks:
No melting point up to decomposition

Any other information on results incl. tables

Melting and Boiling Point (DSC)

The test item showed an endothermic effect in the temperature range of 50 – 170 °C. In the temperature range of 270 – 400 °C an exothermic effect with a mean energy release of -70 J/g could be observed.

Table 1:    Results of the DSC-measurements

No.

Sample weight / mg

Onset of Effect / °C

Range of effect / °C

Weight loss / mg

Atmospheric pressure / hPa

Remark

PN14278

12.75

86.94
---

50 – 150 (endo)
270 – 390 (exo)

5.33

991.0

Figure 1

PN14279

18.41

94.16
---

50 – 170 (endo)
290 – 400 (endo)

6.47

991.0

Figure 2

During the heating an endothermic effects was detected, which can be assigned to the drying of the test item (wt. water 9.17%). No melting or boiling of the test item was detected up to its decomposition starting at a temperature of approximately 270 °C.

Applicant's summary and conclusion

Conclusions:
The test item Leuco Sulphur Brown 46 has no melting point up to its decomposition starting at a temperature of approx. 270 °C as determined by differential scanning calorimetry method according to Regulation EC No. 440/2008 Method A.1., OECD Test Guideline 102 (1995), EPA OCSPP 830.7200 (1998) and CIPAC MT 1 (2009).
Executive summary:

The test item Leuco Sulphur Brown 46 has no melting point up to its decomposition starting at a temperature of approx. 270 °C as determined by differential scanning calorimetry method according to Regulation EC No. 440/2008 Method A.1., OECD Test Guideline 102 (1995), EPA OCSPP 830.7200 (1998) and CIPAC MT 1 (2009).