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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Melting point / freezing point

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Administrative data

Link to relevant study record(s)

melting point/freezing point
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
supporting study
Study period:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
no guideline required
Principles of method if other than guideline:
Calculation of the melting point by EPIWEB
Type of method:
other: calculation
Key result
Melting / freezing pt.:
349.84 °C
Atm. press.:
1 atm
The calculated melting point of Direct Black RBK is ca 350°C

Description of key information

The DSC record of the sample does not show any endothermic signal attributable to a change of state, like melting point is. The melting point indicated in the key value for chemical safety assessment has been estimated by Epiwin.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
349.84 °C

Additional information