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Hydroquinone CAS:123-31-9 C6H6O2

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CAS No.:

123-31-9

Grade:

Industrial Grade

Content:

99%

Port:

SHANGHAI

Brand:

Orient

Packaging:

25kg/bag,500kg/bag, customized

Price valid (until):

2025-12-25

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Qingdao Orient Chemical Co.,LTD

Company Type:

Trader

Location:

China

Qualification:

Main Products:

pharmaceutical intermediates,peptides,electronic chemicals

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Product Description
Seller Information
Inquiry History

Description

Hydroquinone Basic information

Product Name:	Hydroquinone
Synonyms:	Hydroquinone, 99.5%, 99.5%;HYDROXYQUINOL;HYDROCHINONE;HYDROQUINONE;AKOS BBS-00004220;hydroquinone--1,4-benzenediol;Idrochinone;Melanex
CAS:	123-31-9
MF:	C6H6O2
MW:	110.11
EINECS:	204-617-8
Product Categories:	corrosion inhibitor;Aromatics;Redox Catalysts (Environmentally-friendly Oxidation);Environmentally-friendly Oxidation;Synthetic Organic Chemistry;Intermediates of Dyes and Pigments;PINDAC;Building Blocks;Chemical Synthesis;Nutrition Research;Organic Building Blocks;Oxygen Compounds;Phytochemicals by Plant (Food/Spice/Herb);Polyols;Vaccinium myrtillus (Bilberry);123-31-9
Mol File:	123-31-9.mol

Hydroquinone Chemical Properties

Melting point	172-175 °C(lit.)
Boiling point	285 °C(lit.)
bulk density	600kg/m3
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
biological source	synthetic
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
OEL	Ceiling: 2 mg/m3 [15-minute]
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

MSDS Information

Hydroquinone Usage And Synthesis

Description	Hydroquinone (HQ) is produced by the oxidation of aniline or phenol, by the reduction of quinone, or from a reaction of acetylene and carbon monoxide. Hydroquinone occurs naturally as a glucose ether, also known as arbutin, in the leaves of many plants and in fruits, as well as one of the agents used in the defense mechanism of the bombardier beetle, family Carabidae.
Chemical Properties	white needle-like crystals or crystalline powder
Chemical Properties	Hydroquinone, a colorless, hexagonal prism, has been reported to be a good antimitotic and tumor-inhibiting agent. It is a reducing agent used in a photographic developer, which polymerizes in the presence of oxidizing agents. In the manufacturing industry it may occur include bacteriostatic agent, drug, fur processing, motor fuel, paint, organic chemicals, plastics, stone coating, and styrene monomers.
Physical properties	Colorless to pale brown, odorless, hexagonal crystals
Originator	Quinnone,Dermohr,US,1980
Uses	Use as photographic reducer and developer; as reagent in the determination of small quantities of phosphate; as antioxidant. Depigmentor
Uses	hydroquinone is a pigment-lightening agent used in bleaching creams. Hydroquinone combines with oxygen very rapidly and becomes brown when exposed to air. Although it occurs naturally, the synthetic version is the one commonly used in cosmetics. Application to the skin may cause allergic reaction and increase skin sun sensitivity. Hydroquinone is potentially carcinogenic and is associated with causing ochronosis, a discoloration of the skin. The u.S. FDA has banned hydroquinone from oTC cosmetic formulations, but allows 4 percent in prescription products. Its use in cosmetics is prohibited in some european countries and in Australia.
Uses	K channel agonist, antihypertensive
Uses	reducing agent prevents polymerization of resin monomers lightens darkened skin, light sensitive
Uses	Photographic reducer and developer; antioxidant; stabilizing agent for some polymers; intermediate in the manufacturing of some dyes and pigments; in cosmetic formulations.
Definition	ChEBI: A benzenediol comprising benzene core carrying two hydroxy substituents para to each other.
Indications	Hydroquinone interferes with the production of the pigment melanin by epidermal melanocytes through at least two mechanisms: it competitively inhibits tyrosinase, one of the principal enzymes responsible for converting tyrosine to melanin, and it selectively damages melanocytes and melanosomes (the organelles within which melanin is stored).
Production Methods	There are three current manufacturing processes for HQ: oxidative cleavage of diisopropylbenzene, oxidation of aniline, and hydroxylation of phenol. Diisopropylbenzene is air oxidized to the intermediate diisopropylbenzene bishydroperoxide. This hydroperoxide is purified by extraction and reacted further to form hydroquinone. The purified product is isolated by filtration and packaged. The process can be almost entirely closed, continuous, computer-controlled, and monitored. HQcan also be prepared by oxidizing aniline to quinone in the presence of manganese dioxide and sulfuric acid. p-Benzoquinone is then reduced to HQ using iron oxide. The resulting hydroquinone is crystallized and dried. The process occurs in a closed system. HQis also manufactured by hydroxylation of phenol using hydrogen peroxide as a hydroxylation agent. The reaction is catalyzed by strong mineral acids or ferrous or cobalt salts.
Manufacturing Process	Into a pressure reactor there was charged 100 ml of methanol and 1 g of diruthenium nonacarbonyl. The reactor was closed, cooled in solid carbon dioxide/acetone, and evacuated. Acetylene, to the extent of 1 mol (26 g), was metered into the cold reactor. Carbon monoxide was then pressured into this vessel at 835-980 atmospheres, during a period of 16.5 hours; while the reactor was maintained at 100°C to 150°C. The reactor was then cooled to room temperature and opened. The reaction mixture was removed from the vessel and distilled at a pressure of 30-60 mm, and a bath temperature of 30°C to 50°C until the methanol had all been removed. The extremely viscous tarry residue remaining in the still pot was given a very crude distillation, the distillate boiling at 82°C to 132°C/2 mm. In an attempt to purify this distillate by a more careful distillation, 5.3 g of a liquid distilling from 53°C to 150°C/5 mm was collected. At this point, much solid sublimate was noted not only in this distillate but in the condenser of the still. 7 g of the solid sublimate was scraped out of the condenser of the still. Recrystallization of the sublimate from ethyl acetate containing a small amount of petroleum ether gave beautiful crystals melting at 175°C to 177°C (5 g). Infrared analysis confirmed that this compound was hydroquinone (9% conversion).

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—— Q&A ——

Q1:Do you provide sample?

A: Yes, we can provide free sample, you only need pay the shipping cost.

Q2: What is the lead time?

A: For stock goods, it usually take about 5-7 days by air, 15-30 days by sea,For customized products, the delivery time needs to be confirmed based on the actual situation.

Q3: How can I buy? What is the payment method?

A: You can contract us through Email or you can browse our website:orientchem.cc, we have bank transfer.

Q4:What if there are quality issues？

A：We attach great importance to after-sales service of our products. If there are any quality issues, please contact us within 30 days of receiving the goods and we will handle returns and exchanges for you.

Certificates

Basic Info

Product Name:

Hydroquinone

Other Name:

1,4-Benzenediol;Hydroquinone;Arctuvin;p-Benzenediol;Benzohydroquinone;Benzoquinol;p-Dihydroxybenzene;Eldoquin;Hydroquinol;Quinol;Tecquinol;Tenox HQ;p-Dioxybenzene;p-Hydroquinone;1,4-Dihydroxybenzene;p-Hydroxyphenol;HE 5;Diak 5;Eldopaque;Phiaquin;4-Hydroxyphenol;Dihydroquinone;p-Quinol;BQ(H);p-Dihydroquinone;1,4-Benzoquinol;p-Phenylenediol;Eldoquin Forte;Solaquin Forte;Black & White Bleaching Cream;Eldopacque;Aida;Eldopaque Forte;NSC 9247;Solution Q;1,4-p-Benzenediol;1,4-Phenylenediol;1,4-Benzenediol (hydroquinone);8027-02-9;57534-13-1

CAS No.:

123-31-9

UN No.:

2662

Molecular Formula:

C6H6O2

InChIKeys:

InChIKey=QIGBRXMKCJKVMJ-UHFFFAOYSA-N

Molecular Weight:

110.11100

Exact Mass:

110.11

EC Number:

204-617-8

HScode:

2907221000

Categories:

Bulk Drug Intermediates

Characteristics

PSA:

40.46000

XLogP3:

1.09780

Appearance:

Hydroquinone appears as light colored crystals or solutions. May irritate the skin, eyes and mucous membranes. Mildly toxic by ingestion or skin absorption.

Density:

1.332 g/cm³

Melting Point:

170-171 °C

Boiling Point:

285-287 °C

Flash Point:

165ºC

Refractive Index:

1.689

Water Solubility:

H2O: 70 g/L (20 ºC)

Storage Conditions:

Conditions for safe storage, including any incompatibilities: Keep container tightly closed in a dry and well-ventilated place. Air and light sensitive.

Vapor Pressure:

1 mm Hg ( 132 °C)

Vapor Density:

3.81 (vs air)

Toxicity:

LD50 orally in rats: 320 mg/kg (Woodard)

Flammability characteristics:

Combustible Solid; dust cloud may explode if ignited in an enclosed area.

Explosive limit:

Dust cloud may explode if ignited in an enclosed area.

Odor:

Odorless

Taste:

A slightly bitter taste in aqueous solutions

See More Hydroquinone Properties 

Hazard Identification

Classification of the substance or mixture

Acute toxicity - Category 4, Oral

Serious eye damage, Category 1

Skin sensitization, Category 1

Germ cell mutagenicity, Category 2

Carcinogenicity, Category 2

Hazardous to the aquatic environment, short-term (Acute) - Category Acute 1

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Danger
Hazard statement(s)	H302 Harmful if swallowed H318 Causes serious eye damage H317 May cause an allergic skin reaction H341 Suspected of causing genetic defects H351 Suspected of causing cancer H400 Very toxic to aquatic life
Prevention	P264 Wash ... thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/... P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P272 Contaminated work clothing should not be allowed out of the workplace. P203 Obtain, read and follow all safety instructions before use. P273 Avoid release to the environment.
Response	P301+P317 IF SWALLOWED: Get medical help. P330 Rinse mouth. P305+P354+P338 IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P317 Get medical help. P302+P352 IF ON SKIN: Wash with plenty of water/... P333+P317 If skin irritation or rash occurs: Get medical help. P321 Specific treatment (see ... on this label). P362+P364 Take off contaminated clothing and wash it before reuse. P318 IF exposed or concerned, get medical advice. P391 Collect spillage.
Storage	P405 Store locked up.
Disposal	P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

NO open flames. Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust. Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Separated from strong bases and food and feedstuffs.Keep well closed and protected from light.

See More Hydroquinone Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
pharmaceutical intermediates,peptides,electronic chemicals

Location:
Room 102, 1st Floor, East Office Building, No. 45 Pengwan Road, Qianwan Bonded Port Area, Qingdao Zone, China (Shandong) Pilot Free Trade Zone

Payment Terms:
100% TT in advance

Average lead Time:
10

Total Annual Revenue:
$10 million-$25 million

Total Employees:
51-100

Year of Establishment:
2024

A reliable supplier is like insurance.

We are mainly specilized in supply of pharmaceutical intermediates, electronic chemicals，food additives, and other fine chemical products.
Integrity is the foundation, quality is life. We would like to work together with you to build a greener and brighter future.

Website: orientchem.cc
Email: scarlett@orientchem.cc
WhatsApp: +86 17753254221

Inquiry History

25 Inquiries

Country	Product	Purchase Quantity	Date Posted
Israel	High quality hydroquinone 99.9% cas 123-31-9	100 G	Sep 28, 2023
Cameroon	High quality hydroquinone 99.9% cas 123-31-9	1 KG	Jul 6, 2023
Russia	Hydroquinone	1 20' Fcl	May 29, 2026
South Africa	Hydroquinone	40 MT	Mar 24, 2026
United Kingdom	Hydroquinone	60000 KG	Dec 11, 2025
South Korea	hydroquinone	1 KG	Aug 26, 2025
India	hydroaquinone	5.00 KG	Nov 14, 2024
France	Hydroquinone	500 G	Jun 7, 2024
Malaysia	Hydroquinone	500 MT	Apr 26, 2024
Malaysia	Hydroquinone	25 KG	Apr 12, 2024
Brazil	Hidroquinona 60%	1 KG	Mar 28, 2024
Lebanon	Hydroquinone	1 MT	Jul 14, 2023
United Arab Emirates	hydroquinone	50 MT	Jan 2, 2024
Hongkong, China	Hydroquinone	1 20' Fcl	Dec 3, 2024
United States	Hydroquinone 99.6%	5 MT	Sep 17, 2024
Russia	Hydroquinone for synthesis	265 TON	Jun 25, 2024
Russia	Hydroquinone (CAS# 123-31-9)	120 MT	May 17, 2024
India	Hydroquinone	500 KG	Feb 13, 2024
India	factory best price Hydroquinone 99.9% top grade likes	16 MT	Dec 30, 2023
United Kingdom	HYDROQUINONE 99% White needle crystal or free-flow crystalline powder Photo grade	10 KG	Sep 28, 2023

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