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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Referenceopen allclose all

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
peer-reviewed
Principles of method if other than guideline:
No specification of method.
GLP compliance:
not specified
Type of method:
other: data from handbook
Melting / freezing pt.:
170.5 °C
Conclusions:
According to the data in this handbook, the melting point of hydroquinone is 170.5 °C.
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
peer-reviewed
Principles of method if other than guideline:
No specification of method.
GLP compliance:
not specified
Type of method:
other: data from handbook
Melting / freezing pt.:
172 °C

According to the data in this handbook, the melting point of hydroquinone is 172 °C.

Conclusions:
According to the data in this handbook, the melting point of hydroquinone is 172 °C.
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
peer-reviewed
Principles of method if other than guideline:
No specification of method.
GLP compliance:
not specified
Type of method:
other: data from peer-reviewed handbook
Melting / freezing pt.:
170 - 171 °C
Conclusions:
According to the data from this peer-reviewed handbook, the melting point for hydroquinone is between 170 -171 °C.
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
peer-reviewed
Principles of method if other than guideline:
No specification of method.
GLP compliance:
not specified
Type of method:
other: data from peer-reviewed handbook
Melting / freezing pt.:
172 °C
Conclusions:
According to data from this peer-reviewed handbook, the melting point of hydroquinone is 172 °C.
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
peer-reviewed
Principles of method if other than guideline:
No specification of method.
GLP compliance:
not specified
Type of method:
other: data from peer-reviewed database
Melting / freezing pt.:
172.3 °C

According to the data from this peer-reviewed database, the melting point of hydroquinone is 172.3 °C.

Conclusions:
According to the data from this peer-reviewed database, the melting point of hydroquinone is 172.3 °C.
Executive summary:

According to the data from this peer-reviewed database, the melting point of hydroquinone is 172.3 °C.

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
peer-reviewed
Principles of method if other than guideline:
No specification of method
GLP compliance:
not specified
Type of method:
other: data from peer-reviewed handbook
Melting / freezing pt.:
172.3 °C

According to the data from this peer-reviewed handbook, the melting point of hydroquinone is 172.3 °C.

Conclusions:
According to the data from this peer-reviewed handbook, the melting point of hydroquinone is 172.3 °C.
Executive summary:

According to the data from this peer-reviewed handbook, the melting point of hydroquinone is 172.3 °C.

Description of key information

172.3°C at 1013 hPa

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
445.45 K

Additional information

Reliable data from peer-reviewed sources