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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-04-26 to 2018-05-03
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
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:
other: OECD Guideline 113 (Thermal stability)
Version / remarks:
1981
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
signed 2017-02-28
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
Storage conditions: Room temperature, tightly closed and dry
Melting / freezing pt.:
104 °C
Decomposition:
no
Sublimation:
no

Melting/boiling point (DSC)

In the DSC runs several endothermic and one exothermic effects were observed.

Results of the DSC-measurements

No.

Sample weight

[mg]

Onset of Effect

[°C]

Peak of effect

[°C]

Weight loss

[mg]

PN15565

13.16

104.53

144.34

~185

325.82

383.36

482.77

107.43 (endo)

165.02 (endo)

197.41 (exo)

366.59 (endo)

418.07 (endo)

491.13 (endo)

11.17

PN15567

12.54

104.25

152.17

~190

177.70

488.16

107.29 (endo)

153.80 (endo)

200.39 (exo)

188.85 (endo)

498.67 (endo)

6.37

 PN15588  15.77

104.02

143.96

~185

301.41

390.67

490.29

107.43 (endo)

160.21 (endo)

197.13 (exo)

348.89 (endo)

408.95 (endo)

499.84 (endo)

 8.12

Thermal stability (DSC)

Results of the DSC-measurements

No.

Sample weight

[mg]

 Peak of effect /

[°C]

Specific Energy[1]

[J/g]

PN15534 10.46

107.97

173.22

272.76

570.81

-157.41 (endo)

441.03 (exo)

-112.31 (endo)

-83.79 (endo)

PN15556 6.66

106.27

172.48

282.75

595.13

-157.53 (endo)

437.17 (exo)

-106.12 (endo)

-167.25 (endo)

[1]negative specific energy for exothermic processes

Conclusions:
According to Regulation EC No. 440/2008 Method A.1 and OECD Test Guideline 102 (1995) the melting point of Cobalt(2+) disulfamate tetrahydrate is 104 °C.

Description of key information

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
104 °C

Additional information