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  • Hydroquinone CAS#123-31-9
  • Hydroquinone CAS#123-31-9
  • Hydroquinone CAS#123-31-9
  • Hydroquinone CAS#123-31-9
  • Hydroquinone CAS#123-31-9

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Hydroquinone CAS#123-31-9

Hydroquinone CAS#123-31-9

Basic Information

Distinctive Physical Properties‌: Hydroquinone exists as colorless or white crystals with a melting point of 170-171°C and boiling point of 285-287°C, facilitating precise handling and storage in industrial applications.


Controlled Solubility‌: It is highly soluble in hot water, ethanol, and ether, while being slightly soluble in benzene, offering versatile options for solvent-based formulations and chemical processes.


Reactive Chemical Behavior‌: With active chemical properties, it readily undergoes oxidation, esterification, and substitution reactions, making it valuable for synthetic chemistry and organic transformations.


UV Absorbance Characteristics‌: Its aqueous solution exhibits a UV absorption maximum at 288 nm, which is beneficial for analytical and photochemical applications, such as in quality control or light-sensitive material testing.


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product description

Product Description of Hydroquinone CAS#123-31-9

Hydroquinone is a colorless or white crystalline solid. It darkens upon exposure to air and light, with faster oxidation in alkaline solution.
It melts at 170-171°C and boils at 285-287°C, with maximum UV absorption at 288 nm. It dissolves easily in hot water, ethanol and ether, and is slightly soluble in benzene. Chemically active, it is prone to oxidation and can undergo esterification and substitution reactions.


Product Application of Hydroquinone CAS#123-31-9

Hydroquinone is widely applied in analysis and industry. It is used for colorimetric detection of various elements and iridium electrochemical analysis. It acts as a reducing agent and testing reagent for multiple substances. It also works as photographic developer, antioxidant, desulfurizer and urea fertilizer synergist.

Product Information

Parameters


Melting point172-175 °C(lit.)
Boiling point285 °C(lit.)
density1.32
vapor density3.81 (vs air)
vapor pressure1 mm Hg ( 132 °C)
refractive index1.632
Fp165 °C
storage temp.Store below +30°C.
solubilityH2O: 50 mg/mL, clear
pka10.35(at 20℃)
formNeedle-Like Crystals or Crystalline Powder
colorWhite to off-white
Odorodorless
Water Solubility70 g/L (20 ºC)
SensitiveAir & Light Sensitive
Merck144808
BRN605970
Henry's Law Constant(x 10-9 atm?m3/mol): <2.07 at 20 °C (approximate - calculated from water solubility and vapor pressure)
Exposure limitsNIOSH REL: 15-min ceiling 2, IDLH 50; OSHA PEL: TWA 2; ACGIH TLV: TWA 2 (adopted).
Stability:Stable. Combustible. Incompatible with strong oxidizing agents, strong bases, oxygen, ferric salts. Light and air-sensitive. Discolours in air.
InChIKeyQIGBRXMKCJKVMJ-UHFFFAOYSA-N
LogP0.59 at 20℃
CAS DataBase Reference123-31-9(CAS DataBase Reference)
NIST Chemistry ReferenceHydroquinone(123-31-9)
IARC3 (Vol. 15, Sup 7, 71) 1999
EPA Substance Registry SystemHydroquinone (123-31-9)


Safety Information


Hazard CodesXn,N
Risk Statements22-40-41-43-50-68-R68-R50-R43-R41-R40-R22
Safety Statements26-36/37/39-61-S61-S36/37/39-S26
RIDADR2662
WGK Germany3
RTECSMX3500000
Autoignition Temperature930 °F
TSCAYes
HazardClass9
PackingGroupIII
HS Code29072210
Hazardous Substances Data123-31-9(Hazardous Substances Data)
ToxicityLD50 orally in rats: 320 mg/kg (Woodard)
IDLA50 mg/m3


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