Tianjin Zhongxin Chemtech Co., Ltd.  

Product Name: Hydroquinone (HQ) CAS 123-31-9 Model NO.: CT3206 Colour: White Quality: Industrial Appearance: Crystal Type: Quinones Hydroquinone: Hydroquinone Trademark: CT3206 Transport Package: in 25kgs Net Bag Specification: 99-101% Origin: China HS Code: 29 Product Description Hydroquinone Basic informationProduct Name:HydroquinoneSynonyms: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-hydroquinoneCAS:123-31-9MF:C6H6O2MW:110.11EINECS:204-617-8Mol File:123-31-9.molHydroquinone Chemical PropertiesMelting point172-175°C(lit.)Boiling point285°C(lit.)density1.32vapor density3.81 (vs air)vapor pressure1 mm Hg ( 132 °C)Fp165 °Cstorage temp.RefrigeratorsolubilityH2O: 50mg/mL, clearWater Solubility70 g/L (20 ºC)Merck14,4808BRN605970Stability: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 InformationHazard CodesXn,NRisk Statements22-40-41-43-50-68-R68-R50-R43-R41-R40-R22Safety Statements26-36/37/39-61-S61-S36/37/39-S26RIDADR2662WGK Germany3RTECSMX3500000HazardClass9PackingGroupIIIHS Code29072210Hazardous Substances Data123-31-9(Hazardous Substances Data)Hydroquinone Usage And SynthesisChemical Propertieswhite needle-like crystals or crystalline powderUsageK channel agonist, antihypertensiveUsageHydroquinoneUsagereducing agent prevents polymerization of resin monomers lightens darkened skin, light sensitiveUsageUse as photographic reducer and developer; as reagent in the determination of small quantities of phosphate; as antioxidant. DepigmentorDefinitionChEBI: A benzenediol comprising benzene core carrying two hydroxy substituents para to each other.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.