HYDROQUINONE

PRODUCT IDENTIFICATION
CAS NO. 123-31-9

HYDROQUINONE
EINECS NO. 204-617-8
FORMULA C6H4(OH)2
MOL WT. 110.11
H.S. CODE 2907.29

TOXICITY

 Oral rat LD50: 320 mg/kg
SYNONYMS 1,4-Dihydroxybenzene; p-Dihydroxybenzene; 1,4-Benzenediol;
Quinol; 1,4-benzenediol; p Benzendiol; Benzoquinol; 1,4-Hydroxybenzene; p-Hydroquinone; p-Dihydroxybenzene; 1,4-Benzendil; Aida; Black and White Bleaching Cream; Eldoquin; Elopaque; quinnone; 1, 4-dihydroxy-benzeen (Dutch); 1,4-Dihydroxybenzen (Czech); 1,4-Dihydroxy-benzol (German); 1,4- Diidrobenzene (Italian); Hydrochinon (Czech, Polish); Idrochinone (Italian); 对苯二酚 (Chinese); 对苯二酚又名氢醌(Chinese); Hidroquinoa (Spanish);

DERIVATION

  

CLASSIFICATION

 
GENERAL DESCRIPTION OF DIHYDROXYBENZENE
There are three isomeric compounds of dihydroxybenzene molecule structure, which all have traditional names respectively. The ortho (1,2) isomer is called catechol (Also known as catechin; pyrocatechol; pyrocatechuic acid), which forms clear crystals used as a photographic developer in solution and as a starting material to produce synthetic catecholamines which have important physiological effects as neurotransmitters and hormonesany (such as epinephrine,  adrenaline, norepinephrine, and dopamine). The meta (1,3) isomer is resorcinol (also known as resorcin), which forms clear needle crystals used in the production of diazo dyes and plasticizers. It is produced by sulfonating benzene with fuming sulfuric acid and fusing the resulting benzenedisulfonic acid with caustic soda. Resorcinol is used in resins as an UV absorber. It is used in manufacturing fluorescent and leather dyes and adhesives. Reaction with formaldehyde produces resins( (resorcinol formaldehyde resins) used to make rayon and nylon. It is used as a pharmaceutical to treat acne and other greasy skin conditions in combination with other acne treatments such as sulfur. It is used as an anti-dandruff agent in shampoo and sunscreen cosmetics. It is also used as a chemical intermediate to synthesis pharmaceuticals and other organic compounds. The para (1,4) isomer is hydroquinone (also known as quinol), which forms clear prisms used as a photographic reducer and developer (except in color film). It is formed in large quantities by chemical reduction of benzoquinone. This compound is a general-purpose inhibitor, stabilizer, antioxidant, and intermediate. One of the major uses of hydroquinone is as an intermediate to make other inhibitors, stabilizers, antioxidants, agricultural chemicals, and dyes.

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE

light tan, light gray or colorless crystalline solid
MELTING POINT 170 C
BOILING POINT

285 C
SPECIFIC GRAVITY 1.33
SOLUBILITY IN WATER 7g/100g
pH

 
VAPOR DENSITY 3.81

NFPA RATINGS

 Health: 3 Flammability: 1 Reactivity: 0

REFRACTIVE INDEX

 
FLASH POINT

165 C
STABILITY

Stable under ordinary conditions. But this chemical darkens on exposure to air and light

APPLICATIONS

This compound is a good general-purpose inhibitor, stabilizer, antioxidant, and intermediate. It is used as a photographic reducer and developer (except in color film). One of the major uses for hydroquinone is an intermediate to make other inhibitors, stabilizers, antioxidants, agricultural chemicals, and dyes.
SALES SPECIFICATION

PHOTO GRADE

APPEARANCE

light tan, light gray or colorless crystalline solid
ASSAY

99.5% min

MELTING POINT

171 - 175 C

ASH

0.04% max

HEAVY METALS

10ppm max

IRON

10ppm max

WATER

0.1% max

TECH GRADE

ASSAY

99.0% min

MELTING POINT

169.5 C min

LOSS ON DRYING

0.3% max

ASH

0.3% MAX
TRANSPORTATION
PACKING 25kgs in fiber drum
HAZARD CLASS 6.1
UN NO. 2662
MEMBERS OF HYDROQUINONE MOLECULES

Product

CAS RN
(1,1':4',1''-Terphenyl)-2',5'-diol 5422-91-3
2-(4-Methylphenyl)-1,4-benzenediol 10551-32-3
Phenylhydroquinone diacetate 58244-28-3
1-(2,5-Dihydroxy-4-methylphenyl)-2-aminopropane 52336-50-2
1,2,4-Benzenetriacetate 613-03-6
1,2-Dihydro-2,2,4-trimethylquinoline 147-47-7
Hydroquinone, o-toludine, xylidine complex 68478-45-5
(1-Methylpentadecyl)(1-methyltridecyl)hydroquinone 63451-53-6
2-((2-((Dimethylamino)methyl)phenyl)thio)hydroquinone succinate 127906-29-0
2-((2-((Methylamino)methyl)phenyl)thio)hydroquinone succinate 127906-41-6
2-((2-(Aminomethyl)phenyl)thio)hydroquinone succinate 127906-52-9
2-(1-((Dimethylamino)methyl)-2-methylpropyl)-5-(heptylthio)hydroquinone hydriodide 129658-39-5
2-(1,1,3,3-Tetramethylbutyl)hydroquinone 719-03-9
2-(1,1-Dimethylethyl)hydroquinone 4,4',4''-phosphate 21214-39-1
2-(1,1-Dimethylethyl)hydroquinone 4-acetate 717-47-5
2-Methyl-5-[(2R)-6-methylhept-5-en-2-yl]benzene-1,4-diol 69301-25-3
2-(2-Aminopropyl)-5-methylhydroquinone hydrochloride 52336-29-5
2-(2H-Benzotriazol-2-yl)hydroquinone 31701-42-5
2-(3-Methyl-2-butenyl)hydroquinone 5919-91-5
2-(Aminomethyl)hydroquinone 56865-97-5
2-(Phenylmethyl)hydroquinone 1706-73-6
2-(Phenylsulfonyl)hydroquinone 23156-75-4
2,?-Didodecylhydroquinone 72207-58-0
2,3,5-Trichlorohydroquinone 608-94-6
2,3-Dichlorohydroquinone 608-44-6
2,3-Dimethylhydroquinone 608-43-5
2,5-Bis((bis(2-chloroethyl)amino)methyl)hydroquinone 4420-79-5
2,5-Bis((diethylamino)methyl)hydroquinone 5424-68-0
2,5-Bis(1,1,3,3-tetramethylbutyl)hydroquinone 903-19-5
2,5-Diisooctylhydroquinone 57214-69-4
2,5-Dimethoxyhydroquinone 13239-13-9
2,5-Dioctylhydroquinone 10551-36-7
2,6-Bis(1,1-dimethylethyl)hydroquinone 2444-28-2
2,6-Bis(1,1-dimethylethyl)hydroquinone 4,4',4''-phosphate 17709-43-2
2,6-Bis(1-methylethyl)hydroquinone 1988-10-9
2,6-Diiodohydroquinone 1955-21-1
trans-2-Bromo-5-(3,7-dimethyl-2,6-octadienyl)hydroquinone 62008-14-4
2-Ethylhydroquinone 2349-70-4
2-Methoxyhydroquinone 4-acetate 57244-88-9
2-Methoxyhydroquinone diacetate 75514-03-3
2-Nitrohydroquinone 16090-33-8
2-Octadecylhydroquinone 1706-70-3
2-Octadecylhydroquinone 72207-59-1
Bis(1,1,3,3-tetramethylbutyl)hydroquinone 63123-15-9
Bis(1,1-dimethylethyl)hydroquinone 1322-72-1
Bis(1-methylpentadecyl)hydroquinone 63451-51-4
Bis(1-methyltridecyl)hydroquinone 63451-52-5
Dimethylhydroquinone 1321-28-4
Ditetradecylhydroquinone 64654-06-4
Hydroquinone mono(dihydrogen phosphate) 940-75-0
Hydroquinone sulfate 61162-95-6
2-Chlorohydroquinone diacetate 57981-99-4
Hydroquinone piperazine salt 878-28-4
1,4-Cyclohexanedione 637-88-7

1,4-Diacetoxybenzene

1205-91-0
1,4-Dihydroxy-2-methoxy-6-methylbenzene 7417-68-7
1,4-Dimethoxybenzene 150-78-7
1-O-Hexyl-2,3,5-trimethylhydroquinone 148081-72-5
1-Thio-2,5-dihydroxybenzene 2889-61-4
1-Thio-6-bromo-2,5-dihydroxybenzene 116333-48-3
2-(Methylamino)hydroquinone hydrobromide 32190-96-8
2-(S-Cysteinyl)hydroquinone 39484-07-6
2-(S-Glutathionyl)hydroquinone 76726-99-3
2,3,5-(Triglutathion-S-yl)hydroquinone 119212-33-8
2,3,5,6-Tetrabromohydroquinone 2641-89-6
2,3,5,6-Tetrachlorohydroquinone 87-87-6
2,3,5,6-Tetrafluorohydroquinone 771-63-1
2,3,5-Trimethylquinol 700-13-0
2,3,5-Tris(piperidinomethyl)hydroquinone 81741-29-9
2,3-Dicyanohydroquinone 4733-50-0
2,5-Diaziridinylhydroquinone 2588-34-3
2,5-Dichlorohydroquinone 824-69-1
2,5-Dicyclopentylhydroquinone 93841-39-5

2,5-Dihydroxy-1,4-benzenedisulfonic acid, dipotassium salt

15763-57-2
Sesquiterpene hydroquinone 156848-68-9

2,5-Dihydroxybenzoic acid

490-79-9
2,5-Dihydroxybenzyl alcohol 495-08-9
2,5-Dimethoxyamphetamine 2801-68-5

2,5-Dimethylhydroquinone

615-90-7

2,5-Dimethylhydroquinone 615-90-7

2,5-Di-sec-dodecyl-1,4-benzenediol

60350-71-2

2,5-Di-tert-butylhydroquinone 88-58-4
2,5-Di-t-pentylhydroquinone 79-74-3
2,6-Dibromohydroquinone 3333-25-3
2,6-Dichloro-4-hydroquinone 20103-10-0
2,6-Dimethoxyhydroquinone-3-mercaptoacetic acid 133735-47-4
2,6-Dimethylhydroquinone 654-42-2
2-Aminohydroquinone hydrobromide 64158-75-4
2-Bromo-(diglutathion-S-yl)hydroquinone 114783-67-4
2-Bromo-3-(glutathion-s-yl)hydroquinone 99133-21-8
2-Bromo-3-(N-acetylcystein-S-yl)hydroquinone 126190-04-3
2-Bromo-5-(N-acetylcystein-S-yl)hydroquinone 126216-13-5
2-Bromo-5-cystein-S-ylhydroquinone 126128-51-6
2-Bromo-6-(glutathion-S-yl)hydroquinone 114865-64-4
2-Bromo-6-(N-acetylcystein-S-yl)hydroquinone 126190-18-9
2-Bromo-6-cystein-S-ylhydroquinone 127391-97-3
2-Bromohydroquinone 583-69-7
2-Butylhydroquinone 4197-69-7
2-Chloro-1,4-hydroxyquinone 615-67-8
2-Cyclopentylhydroquinone 65578-65-6
2-Hexadecyl-5-methylhydroquinone 21182-65-0
2-Isopropylhydroquinone 2349-71-5
2-Methoxyhydroquinone 824-46-4
2-Methyl-1,4-hydroquinone 95-71-6

2-Octyl-1,4-benzenediol

1706-69-0
Poly(caprolactone, hydroquinone diethylol ether, 4,4'-diphenylmethane diisocyanate) 152187-62-7
2-tert-Butyl-1,4-phenylene diacetate 7507-48-4
2-tert-Butylhydroquinone 1948-33-0
3,6-Dimethyl-2,5-diaziridinylhydroquinone 152923-07-4
Sesquiterpene hydroquinone 156848-67-8
Poly( 3a,4,7,7a-tetrahydro-4,7-methanoisobenzofuran-1,3-dione, 1,2-propanediol, hydroquinone) 83864-25-9

4-Ethoxyphenol

622-62-8

4-Hydroxyphenylacetate 3233-32-7

4-Propoxyphenol

18979-50-5
5-(S-Glutathionyl)-2-tert-butylhydroquinone 139035-70-4
6-(S-Glutathionyl)-2-tert-butylhydroquinone 139035-71-5
Hydroquinone-O,O-diacetic acid 2245-53-6
alpha-Tocopherol quinol 14745-36-9
Anoxomer 60837-57-2
Arbutin 497-76-7
Avarol 55303-98-5
Avarol monoacetate 122143-92-4
Aminohydroquinone dimethyl ether 102-56-7
Formaldehyde di(hydroquinonemonomethylether) acetal 56207-34-2
2-Methylhydroquinone dimethyl ether 24599-58-4
Chlorohydroquinone dimethyl ether 2100-42-7
Sodium hydroquinone sulfonate 29632-98-2
Methylhydroquinone di(p-butylbenzoate) 64835-62-7
Bis(octahydro-4,7-methano-1H-inden-2-yl)hydroquinone 93841-45-3
2-Amino-5-benzoylaminohydroquinone diethyl ether 120-00-3
Calcium Dobesilate 20123-80-2
Hydroquinone bis(dimethylcarbamate) 63884-51-5
Poly(hydroquinone-sulfonic acid, formaldehyde) 70244-08-5
2-(3-Methyl-2-butenyl)-5-(3-methyl-3-buten-1-ynyl)hydroquinone 125213-21-0
Dephostatin 151606-30-3
Dicyclooctylhydroquinone 93841-46-4
Diisooctylhydroquinone 53823-28-2
Durohydroquinone 527-18-4
Duroquinol 5664-09-5
Poly(hydroquinone, butylphen, formaldehyde) 69856-03-7
Poly(formaldehyde, hydroquinone) 26353-95-7
Gentisic acid 490-79-9
Geranylgeranylhydroquinone 39703-09-8
Geroquinol 10457-66-6
2-(Glutathion-S-yl)hydroquinone 149126-45-4
Hexaprenylhydroquinone sulfate 113267-17-7
Hydroquinone 123-31-9

Hydroquinone bis(2-hydroxyethyl)ether

104-38-1

Hydroquinone diacrylate

6729-79-9

Hydroquinone Diethyl Ether

122-95-2

Hydroquinone diglycidyl ether

2425-01-6

2-(Di-2'-chloroethylamino)-5-methoxyhydroquinone 63884-42-4
2,5-Bis((dimethylamino)methyl)hydroquinone 6339-48-6
2,5-Bis(bis(2'-chloroethyl)amino)hydroquinone diacetate 67227-52-5
2,6-Dimethoxyhydroquinone 15233-65-5
2-Methyl-3,5,6-tribromohydroquinone 63884-43-5
Hydroquinone, sulfur dioxide complex 1786-27-2
Iodohydroquinone 23030-43-5

Methylhydroquinone

96937-50-7
Monothiohydroquinone 637-89-8
Hydroxyhydroquinone 533-73-3
Menadiol sodium diphosphate anhydrous 131-13-5
Menadiol 481-85-6
Mequinol 150-76-5
Poly( 4,4'-Difluorobenzophenone, hydroquinone) 29658-26-2
Metoquinone 622-91-3
Miconidin 34272-58-7
Monobenzone 103-16-2
Nitroquinol sulfate 61865-95-0
Oxphaman 112851-89-5
Phenylhydroquinone 1079-21-6
Hydroquinone bis(bis(1-aziridinyl)phosphinate) 1858-46-4
Plastoquinol 3819-09-8
Quinhydrone 106-34-3
Quinol sulfate 17438-29-8

Resorcinol

108-46-3
Retinal, hydroquinone complex 3915-70-6
Sesamol 533-31-3
Siccayne 22944-03-2
Hydroquinone sodium bisulfite complex 72207-92-2
2,3,5,6-tetrakis(methylthio)hydroquinone 145345-85-3

Tetramethoxyhydroquinone

52092-59-8

Thymohydroquinone 2217-60-9
Ubiquinol 56275-39-9
Ubiquinol-10 5677-55-4