Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 204-617-8 | CAS number: 123-31-9
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Vapour pressure
Administrative data
Link to relevant study record(s)
- 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
- 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
- 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
- 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
- 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.
Referenceopen allclose all
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.
According to the data from this handbook, the vapor pressure for hydroquinone is 1.33 hPa at 132.4 °C.
According to the data from this peer-reviewed database, the vapor pressure of hydroquinone is 0.0000253 hPa at 25 °C.
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
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.