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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

Additional toxicological data
Administrative data
- Endpoint:
- additional toxicological information
- Type of information:
- experimental study
- Remarks:
- risk assessment
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
Data source
Referenceopen allclose all
- Reference Type:
- other: risk assessment
- Title:
- Hydroquinone
- Author:
- ACGIH
- Year:
- 1 992
- Bibliographic source:
- American Conference of Governmental and Industrial Hygienists, Documentation of the Threshold Limit Values and Biological Exposure Indices. p. 789 - 792
- Reference Type:
- other: risk assessment
- Title:
- Hydroquinone
- Author:
- ACGIH
- Year:
- 2 001
- Bibliographic source:
- American Conference of Governmental and Industrial Hygienists, Documentation of the Threshold Limit Values and Biological Exposure Indices. p. 1-4
- Reference Type:
- review article or handbook
- Title:
- Cosmetic ingredient review. Final report on the safety assessment of hydroquinone and pyrocatechol.
- Author:
- CIR Expert Panel
- Year:
- 1 986
- Bibliographic source:
- J Am Coll Toxicol 5, 123 - 165
- Reference Type:
- review article or handbook
- Title:
- Toxicological aspects and health risks associated with hydroquinone in skin bleaching formula. (In Dutch with English abstract)
- Author:
- Kooyers TJ, Westerhof W
- Year:
- 2 004
- Bibliographic source:
- Ned Tijdschr Geneeskd 148, 768 - 771
- Reference Type:
- review article or handbook
- Title:
- Addendum to the final report on the safety assessment of Hydroquinone.
- Author:
- Zondlo MM
- Year:
- 1 994
- Bibliographic source:
- J Am Coll Toxicol 13, 167 - 230
- Reference Type:
- review article or handbook
- Title:
- The safety of hydroquinone.
- Author:
- Nordlund JJ, Grimes PE, Ortonne JP
- Year:
- 2 006
- Bibliographic source:
- J Eur Acad Dermatol Venereol 20, 781-787
- Reference Type:
- review article or handbook
- Title:
- Final amended safety assessment of hydroquinone as used in cosmetics.
- Author:
- Andersen FA, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD, Liebler DC, Marks JG, Shank RC, Slaga TJ, Snyder PW.
- Year:
- 2 010
- Bibliographic source:
- Int J Toxicol. 29(Suppl 6):274S-2787
Materials and methods
Test material
- Reference substance name:
- Hydroquinone
- EC Number:
- 204-617-8
- EC Name:
- Hydroquinone
- Cas Number:
- 123-31-9
- Molecular formula:
- C6H6O2
- IUPAC Name:
- hydroquinone
Constituent 1
Results and discussion
Applicant's summary and conclusion
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