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1,4-Benzoquinone, commonly known as para-quinone, is a chemical compound with the formula C6H4O2. In a pure state, it forms bright-yellow crystals with a characteristic irritating odor, resembling that of chlorine, bleach, and hot plastic. This six-membered ring compound is the oxidized derivative of 1,4-hydroquinone. The molecule is multifunctional it exhibits properties of a ketone, forming an oxime; an oxidant, forming the dihydroxy derivative; and an alkene, undergoing addition reactions, especially those typical for α ,β -unsaturated ketones. 1,4-Benzoquinone is sensitive toward both strong mineral acids and alkali, which cause condensation and decomposition of the compound.
Appearance & Physical State	yellow to green crystalline solid
Density	1.318
Melting Point	112-116ºC
Boiling Point	293ºC
Flash Point	38ºC
Refractive Index	n20/D 1.453
Water Solubility	10 g/L (25 ºC)
Stability	Stable, but light sensitive. Incompatible with strong oxidizing agents. Flammable.
Storage Condition	2-8ºC
Vapor Pressure	0.1 mm Hg ( 25 °C)
Vapor Density	3.73 (vs air)

Appearance	Yellow crystal powder
Purity	≥ 99.0%
Melting Point	112.0-116.0℃
Water	≤ 0.5%
Ash	≤ 0.05%
Content	99%
Capacity	100MT/month
Loading port	Shanghai
Package	25kg/drum or according to the customers’ demand One 20 Fcl can load 12MT.
Storage	Stored in the dry and ventilated inside storeroom, prevent direct sunlight, slightly pile and put down

Appearance	Yellow crystal powder
Purity	≥ 99.0%
Melting Point	112.0-116.0℃
Water	≤ 0.5%
Ash	≤ 0.05%
Content	99%
Capacity	100MT/month
Loading port	Shanghai
Package	25kg/drum or according to the customers’ demand One 20 Fcl can load 12MT.
Storage	Stored in the dry and ventilated inside storeroom, prevent direct sunlight, slightly pile and put down

Synonyms:	1,4-Benzochinon; 1,4-Benzoquine; 1,4-Cyclohexadiene dioxide; 1,4-Cyclohexadienedione; 1,4-cyclohexadienedioxide; 1,4-Diossibenzene; 1,4-dioxybenzene; 1,4-Dioxy-benzol
MW:	108.09
EINECS:	203-405-2
Product Categories:	Intermediates of Dyes and Pigments; Benzoquinones, etc. (Charge Transfer Complexes); Charge Transfer Complexes for Organic Metals; Benzoquinones; Functional Materials
mp :	113-115 °C(lit.)
bp :	293°C
density :	1.31
vapor density :	3.73 (vs air)
vapor pressure :	0.1 mm Hg ( 25 °C)
refractive index :	n20/D 1.453
Fp :	38°C
storage temp. :	2-8°C
Water Solubility :	10 g/L (25 ºC)
Merck :	14,8074
BRN :	773967
Stability:	; Stable, but light sensitive. Incompatible with strong oxidizing agents. Flammable.
Safety Information
Hazard Codes :	T,N,Xn,F
Risk Statements :	23/25-36/37/38-50-20/21/22-11
Safety Statements :	26-28-45-61-28A-23-16
RIDADR :	UN 2587 6.1/PG 2
WGK Germany :	3
RTECS :	DK2625000
F :	8
HazardClass :	6.1
PackingGroup :	II

Molecular Formula: C6H4O2
Molecular Weight: 108.09
Hazard Symbols: T,N,Xn,F
UN Number: UN 2587 6.1/PG 2
WGKGermany: 3
PackingGroup: II
HS Code: 2914 69 80

Appearance: Yellow or pale green crystal powder | Melting point: 112.0- 116.0 ºC | Residue on Ignition: ≤0.05% | Moisture: ≤0.5% | ASSAY: ≥99.0%

Molecular Fomula	C6H4O2
Molecular weight	108.09
Appearance	Yellow crystal powder
Assay	99%min

Assay : 99%

1,4-Benzoquinone/para-benzoquinone/PBQ/P-benzoquinone CAS 106-51-4

It can be used as dye and pharmaceutical intermediates, rubber protective agent, inhibitor, antioxidants, developer, and so on。The application as following:

1.Can be used as Pesticide intermediates, such as Ethofumesate
2.As Pharmaceutical intermediates, such as Etamsylate
3.As raw material for Flame retardants
4.Used at resin as Polymerization inhibitor
5.Also can be used at Petrifaction,especially for the product of Poly(vinyl alcohol),the PBQ has great effect as inhibitor for the product.
6.Dye intermediate

Item Specifications Results
Appearance Yellow crystal powder Yellow crystal powder
Content ≥99.0% 99.53%
Melting point 112.0-116.0℃ 113.0-113.6℃
Ash ≤0.05% 0.03%
Loss on drying ≤0.5% 0.28%
Conclusion The results conforms with enterprise standards