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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Vapour pressure

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Endpoint:
vapour pressure
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
Temp.:
150 °C
Vapour pressure:
5.33 hPa
Remarks on result:
other: Converted from 4 mm Hg
Temp.:
192 °C
Vapour pressure:
53.33 hPa
Remarks on result:
other: Converted from 40 mm Hg
Temp.:
238 °C
Vapour pressure:
266.64 hPa
Remarks on result:
other: Converted from 200 mm Hg

According to the data from this handbook, the vapor pressure of hydroquinone is 5.33 hPa at 150 °C, 53.33 hPa at 192 °C, 266.64 hPa at 238 °C.

Conclusions:
According to the data from this handbook, the vapor pressure of hydroquinone is 5.33 hPa at 150 °C, 53.33 hPa at 192 °C, 266.64 hPa at 238 °C.
Endpoint:
vapour pressure
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
Temp.:
132.4 °C
Vapour pressure:
1.33 hPa
Remarks on result:
other: Converted from 1 mm Hg

According to the data from this handbook, the vapor pressure for hydroquinone is 1.33 hPa at 132.4 °C.

Conclusions:
According to the data from this handbook, the vapor pressure for hydroquinone is 1.33 hPa at 132.4 °C.
Endpoint:
vapour pressure
Type of information:
calculation (if not (Q)SAR)
Remarks:
estimated by calculation
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:
calculated from experimentally derived coefficients.
GLP compliance:
not specified
Type of method:
other: extrapolation
Temp.:
25 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Converted from 1.9X10-5 mm Hg

According to the data from this peer-reviewed database, the vapor pressure of hydroquinone is 0.0000253 hPa at 25 °C.

Conclusions:
According to the data from this peer-reviewed database, the vapor pressure of hydroquinone is 0.0000253 hPa at 25 °C.
Executive summary:

According to the data from this peer-reviewed database, the vapor pressure of hydroquinone is 0.0000253 hPa at 25 °C.

Endpoint:
vapour pressure
Type of information:
calculation (if not (Q)SAR)
Remarks:
estimated by calculation
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:
extrapolated value
GLP compliance:
not specified
Type of method:
other: data from peer-reviewed database
Temp.:
25 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Converted from 0.000024 mm Hg

According to the data from this peer-reviewed database, the vapor pressure of hydroquinone is 0.000032 hPa at 25 °C.

Conclusions:
According to the data from this peer-reviewed database, the vapor pressure of hydroquinone is 0.000032 hPa at 25 °C.
Executive summary:

According to the data from this peer-reviewed database, the vapor pressure of hydroquinone is 0.000032 hPa at 25 °C.

Description of key information

0.000032 hPa at 25 °C (extrapolated based on measured values)

Key value for chemical safety assessment

Vapour pressure:
0.003 Pa
at the temperature of:
298.15 K

Additional information

Reliable data from peer-reviewed sources