Hydroquinone CAS#123-31-9
CAS Number: 123-31-9
Chemical Formula: C6H6O2
Synonyms:
HYDROXYQUINOL
HYDROCHINONE
Melanex
Appearance: White power
HS Code: 2907221000
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Products Description of HydroquinoneCAS#123-31-9
Hydroquinone, also known as 1,4-benzenediol, has the molecular formula C₆H₆O₂ and a molecular weight of 110.11.
It appears as colorless or white crystals and tends to discolor when exposed to light and air. Its aqueous solution oxidizes to a brown color in air, with a faster oxidation rate in alkaline media.
Its key physical properties include a melting point of 170–171℃, a boiling point of 285–287℃, a relative density of 1.33215, and a UV λmax of 288nm in water.
It is highly soluble in hot water, ethanol, and ether, but slightly soluble in benzene. With active chemical properties, it is prone to oxidation and can also undergo reactions such as esterification and substitution.
Parameters
Melting point | 172-175 °C(lit.) |
Boiling point | 285 °C(lit.) |
density | 1.32 |
vapor density | 3.81 (vs air) |
vapor pressure | 1 mm Hg ( 132 °C) |
refractive index | 1.6320 |
Fp | 165 °C |
storage temp. | Store below +30°C. |
solubility | H2O: 50 mg/mL, clear |
pka | 10.35(at 20℃) |
form | Needle-Like Crystals or Crystalline Powder |
color | White to off-white |
Odor | odorless |
Water Solubility | 70 g/L (20 ºC) |
Sensitive | Air & Light Sensitive |
Merck | 14,4808 |
BRN | 605970 |
Henry's Law Constant | (x 10-9 atm?m3/mol): <2.07 at 20 °C (approximate - calculated from water solubility and vapor pressure) |
Exposure limits | NIOSH 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. |
InChIKey | QIGBRXMKCJKVMJ-UHFFFAOYSA-N |
LogP | 0.59 at 20℃ |
CAS DataBase Reference | 123-31-9(CAS DataBase Reference) |
NIST Chemistry Reference | Hydroquinone(123-31-9) |
IARC | 3 (Vol. 15, Sup 7, 71) 1999 |
EPA Substance Registry System | Hydroquinone (123-31-9) |
Safety Information
Hazard Codes | Xn,N |
Risk Statements | 22-40-41-43-50-68-R68-R50-R43-R41-R40-R22 |
Safety Statements | 26-36/37/39-61-S61-S36/37/39-S26 |
RIDADR | 2662 |
WGK Germany | 3 |
RTECS | MX3500000 |
Autoignition Temperature | 930 °F |
TSCA | Yes |
HazardClass | 9 |
PackingGroup | III |
HS Code | 29072210 |
Hazardous Substances Data | 123-31-9(Hazardous Substances Data) |
Toxicity | LD50 orally in rats: 320 mg/kg (Woodard) |
IDLA | 50 mg/m3 |
Product Application of HydroquinoneCAS#123-31-9
Colorimetric determination of phosphorus, magnesium, niobium, copper, silicon, and arsenic
Polarographic and volumetric determination of iridium
Reducing agent for heteropolyacids, as well as for copper and gold
Detection of phosphates, tungstates, nitrates, nitrites, selenium, and tellurium
Developer, antioxidant, desulfurizer in the fertilizer industry, and urea synergist
Factory and Equipment Show
Fast delivery time
Inventory 2-3 working days New production 7-10 working days
