Hydroquinone

Brief Description
CAS No.: 123-31-9 Other Names: Hydroquinone MF: C6H6O2
EINECS No.: 204-617-8 Place of Origin: China (Mainland) Classification: Double Components Adhesives
Main Raw Material: Polyurethane Usage: Construction, Fiber & Garment, Footwear ... Brand Name: LONGCOM
Specifications
Hydroquinone

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Hydroquinone Basic information
Product Name:Hydroquinone
Synonyms:1,4-Benzenediol (hydroquinone);1,4-Dihydroxy-benzeen;1,4-Dihydroxybenzen;1,4-dihydroxybenzen(czech);1,4-Dihydroxy-benzol;1,4-Diidrobenzene;4-Hydroxyphenol;alpha-hydroquinone
CAS:123-31-9
MF:C6H6O2
MW:110.11
EINECS:204-617-8
Product Categories:Intermediates of Dyes and Pigments;Redox Catalysts (Environmentally-friendly Oxidation);Environmentally-friendly Oxidation;Synthetic Organic Chemistry;Aromatics
Mol File:123-31-9.mol
 
 
Hydroquinone Chemical Properties
mp 172-175 °C(lit.)
bp 285 °C(lit.)
density 1.32
vapor density 3.81 (vs air)
vapor pressure 1 mm Hg ( 132 °C)
Fp 165 °C
storage temp. Refrigerator
solubility H2O: 50 mg/mL, clear
Water Solubility 70 g/L (20 ºC)
Merck 14,4808
BRN 605970
Stability:Stable. Combustible. Incompatible with strong oxidizing agents, strong bases, oxygen, ferric salts. Light and air-sensitive. Discolours in air.
CAS DataBase Reference123-31-9(CAS DataBase Reference)
NIST Chemistry ReferenceHydroquinone(123-31-9)
EPA Substance Registry System1,4-Benzenediol(123-31-9)
 
Safety Information
Hazard Codes Xn,N
Risk Statements 22-40-41-43-50-68
Safety Statements 26-36/37/39-61
RIDADR 2662
WGK Germany 3
RTECS MX3500000
HazardClass 9
PackingGroup III
HS Code 29072210
Hazardous Substances Data123-31-9(Hazardous Substances Data)
 
MSDS Information
ProviderLanguage
SigmaAldrichEnglish
ACROSEnglish
ALFAEnglish
 
Hydroquinone Usage And Synthesis
Chemical Propertieswhite needle-like crystals or crystalline powder
UsageUse as photographic reducer and developer; as reagent in the determination of small quantities of phosphate; as antioxidant. Depigmentor
General DescriptionLight colored crystals or solutions. May irritate the skin, eyes and mucous membranes. Mildly toxic by ingestion or skin absorption.
Air & Water ReactionsDarkens on exposure to air and light. Miscible in water. Solutions become brown in air due to oxidation. Oxidation is very rapid in the presence of alkali.
Reactivity ProfileHydroquinone is a slight explosion hazard when exposed to heat. Incompatible with strong oxidizing agents. Also incompatible with bases. Hydroquinone reacts with oxygen and sodium hydroxide. Reacts with ferric salts . Hot and/or concentrated NaOH can cause Hydroquinone to decompose exothermically at elevated temperature. (NFPA Pub. 491M, 1975, 385)
Health HazardHydroquinone is very toxic; the probable oral lethal dose for humans is 50-500 mg/kg, or between 1 teaspoon and 1 ounce for a 150 lb. person. It is irritating but not corrosive. Fatal human doses have ranged from 5-12 grams, but 300-500 mg have been ingested daily for 3-5 months without ill effects. Death is apparently initiated by respiratory failure or anoxia.
Fire HazardDust cloud may explode if ignited in an enclosed area. Hydroquinone can react with oxidizing materials and is rapidly oxidized in the presence of alkaline materials. Oxidizes in air.