Hydroquinone CAS NO.123-31-9

product information

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;building blocks;chemical synthesis;nutrition research;organic building blocks;oxygen compounds;phytochemicals by plant (food/spice/herb);polyols;vaccinium myrtillus (bilberry);pindac
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 reference	123-31-9(cas database reference)
nist chemistry reference	hydroquinone(123-31-9)
epa substance registry system	1,4-benzenediol(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
hazardclass	9
packinggroup	iii
hs code	29072210
hazardous substances data	123-31-9(hazardous substances data)

msds information

provider	language
sigmaaldrich	english
acros	english
alfa	english

hydroquinone usage and synthesis

chemical properties	white needle-like crystals or crystalline powder
usage	k channel agonist, antihypertensive
usage	hydroquinone
usage	reducing agent prevents polymerization of resin monomers lightens darkened skin, light sensitive
usage	use as photographic reducer and developer; as reagent in the determination of small quantities of phosphate; as antioxidant. depigmentor
general description	light colored crystals or solutions. may irritate the skin, eyes and mucous membranes. mildly toxic by ingestion or skin absorption.
air & water reactions	darkens 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 profile	hydroquinone 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 hazard	hydroquinone 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 hazard	dust 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.

company information

henan sunlake enterprise corporation is located in henan province , the central plain of china , which enjoys favorable geogeaphical position and convenient transportion, the com[any was established in june. 1998 , until now having more than 18 years experience in manufacturing & exporting chemical raw material .

sunlake is a professional manufacturer engaged in producing and selling chemicals,including organic & inorganic chemicals , pigments & dyestuffs , water treatment chemicals , food & feed additives and others . these products have been being well exported to europe , southeast asia , the middle east , africa , south america and some other countries and areas.

we sincerely welcome foreign friends to visit our plant for cooperation. with the idea of "quality first,credit priority, excellent service", we are highly acknowledged by customers for good quality and competitive price. more importantly , the company has a strong r & d team, who are professional engineers and scholars with ph. d. .so we are confident to serve you better with our high - quality products and professional team.

we are taking great efforts to provide our customers with demanded goods and professional services, and continuously improve our core ability of competition and get the momentum for sustainable development, and finally make us being a reliable and professional wupplier in international market.

we welcome any serious inquiries from all customers of the world, and sincerely hope to cooperate.