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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Reference
Endpoint:
melting point/freezing point
Type of information:
(Q)SAR
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
Justification for type of information:
QSAR prediction: US EPA accepted QSAR method for organic chemicals properties assessment.
Qualifier:
according to guideline
Guideline:
other: QSAR data
Principles of method if other than guideline:
Estimation: EPI Suite (Mean or Weighted MP) , MPBPWIN (v.1.43)
GLP compliance:
no
Remarks:
not applicable to QSAR models
Type of method:
other: QSAR
Melting / freezing pt.:
302.03 °C
Atm. press.:
1 other: atm
Remarks on result:
other: The exact atmospheric pressure at which this result was determined is not stated, but may be assumed to be within the normal range of standard pressure.
Melting / freezing pt.:
349.84 °C
Atm. press.:
1 atm
Remarks on result:
other: According adapted Joback Method

Overview of QSARs estimationson melting/freezing point of Dipotassium oxide/Potassium oxide

 

Method

 

Results

Remarks

Reference

QSAR estimate

290.08oC (Gold and Ogle method);

349.84oC (adapted Joback Method);

319.96 deg C (Joback; Gold,Ogle Methods)

 

 Selected MP:  302.03 deg C (Mean Value)

 

Valid with restrictions (2); QSAR method;

Estimated values

MPBPWIN (v.1.43)

Conclusions:
Using the EPI Suite Mpbwin (v.1.43) QSAR model, a Melting Point of 349.84 deg C was established according adapted Joback Method
Using the EPI Suite Mpbwin (v.1.43) QSAR model, a Melting Point of 302.03 deg C (Mean Value) was established.
Executive summary:

Using the EPI Suite Mpbwin (v.1.43) QSAR model, a Melting Point of 349.84 deg C was established according adapted Joback Method

Using the EPI Suite Mpbwin (v.1.43) QSAR model, a Melting Point of 302.03 deg C (Mean Value) was established.

Description of key information

Using the EPI Suite Mpbwin (v.1.43) QSAR model, a Melting Point of 349.84 deg C was established according adapted Joback Method
Using the EPI Suite Mpbwin (v.1.43) QSAR model, a Melting Point of 302.03 deg C (Mean Value) was established.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
302.02 °C

Additional information

Using the EPI Suite Mpbwin (v.1.43) QSAR model, a Melting Point of 349.84 deg C was established according adapted Joback Method.

Using the EPI Suite Mpbwin (v.1.43) QSAR model, a Melting Point of 302.03 deg C (Mean Value) was established.