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Xylene

Description References
Xylene
Xylene structure
CAS No.
1330-20-7
Chemical Name:
Xylene
Synonyms
XyL;enes;XYLOL;ksylen;xiloli;xylole;XYLENE;violet3;xylenen;XYLENES
CBNumber:
CB0130912
Molecular Formula:
C8H10
Formula Weight:
106.17
MOL File:
1330-20-7.mol

Xylene Properties

Melting point:
-34 °C
Boiling point:
137-140 °C(lit.)
Density 
0.86 g/mL at 25 °C(lit.)
vapor density 
3.7 (vs air)
vapor pressure 
18 mm Hg ( 37.7 °C)
refractive index 
n20/D 1.497(lit.)
Flash point:
77 °F(lit.)
storage temp. 
Flammables area
form 
Liquid
color 
APHA: ≤10
explosive limit
7%
Water Solubility 
<0.1 g/L (20 ºC)
Merck 
14,10081
BRN 
1901563
InChIKey
KAKOUNRRKSHVJO-UHFFFAOYSA-N
Indirect Additives used in Food Contact Substances
XYLENE
CAS DataBase Reference
1330-20-7(CAS DataBase Reference)
FDA 21 CFR
175.105; 176.180; 177.1010; 177.1650
EWG's Food Scores
8
FDA UNII
D856J1047R
EPA Substance Registry System
Xylene (1330-20-7)
SAFETY
  • Risk and Safety Statements
Symbol(GHS) 
GHS02,GHS07,GHS08
Signal word  Danger
Hazard statements  H303-H312-H332-H226-H304-H312+H332-H315-H319-H335-H373-H412
Precautionary statements  P262-P302+P352-P210-P260-P280-P301+P310-P305+P351+P338-P370+P378-P331
Hazard Codes  Xn,F
Risk Statements  10-20/21-38-36/38-65-48/20
Safety Statements  25-36/37-62
RIDADR  UN 1307 3/PG 3
WGK Germany  2
RTECS  ZE2100000
Autoignition Temperature 867 °F
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29024400
Toxicity LD50 oral in rat: 4300mg/kg
NFPA 704
3
2 0

Xylene price More Price(33)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 214736 Xylenes reagent grade 1330-20-7 1l $73.7 2019-12-02 Buy
Sigma-Aldrich 1601849 Residual Solvent Class 2 - Xylenes United States Pharmacopeia (USP) Reference Standard 1330-20-7 3x1.2ml $352.8 2019-12-02 Buy
Alfa Aesar L13317 Xylenes, mixed, 97+% 1330-20-7 500ml $24.7 2020-06-24 Buy
Alfa Aesar L13317 Xylenes, mixed, 97+% 1330-20-7 1000ml $33 2020-06-24 Buy
Sigma-Aldrich 534056 Xylenes histological grade 1330-20-7 500ml $35.1 2019-12-02 Buy

Xylene Chemical Properties,Uses,Production

Description

As one of the most common chemicals used in industry, Xylene it is commonly found in ink, rubber, varnishes, adhesives, jet fuel, gasoline, pesticides, perfumes, pharmaceuticals, and elsewhere. It can be used as a solvent and cleaner for acrylic antiquing sealers on concrete, a paint thinner, and a transfer agent for printed materials, among many other uses.
In histology, it is used as a clearing agent to prepare samples for coverslipping, as well as tissue processing and staining. As a wax solvent, it can remove paraffin from slides prior to use.
Paraxylene, one of its isomers, is also used as a precursor to terephthalic acid and dimethyl terephthalate, both important raw materials for the production of polyethylene terephthalate (PET), a type of plastic commonly used for bottles and other packaging. Various isomers of xylene are also used as a precursors for polyester fabric, tear gas, and other chemicals.

References

https://en.wikipedia.org/wiki/Xylene
http://sciencing.com/uses-xylene-5544817.html
http://www.toxipedia.org/display/toxipedia/Xylene
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2996004/
http://www.manmadediy.com/users/martin/posts/1374-how-to-make-a-gigantic-solvent-transfer
http://www.worldofchemicals.com/423/chemistry-articles/xylene-a-solvent-mixture-of-three-isomers.html

Description

Xylene is used as a solvent. In this application, the mixture of isomers is often referred to as xylenes or xylol. Solvent xylene often contains a small percentage of ethylbenzene. Like the individual isomers, the mixture is colourless, sweet smelling, and highly flammable. Application of xylene is extensive and includes, but is not limited to, printing, rubber, and leather industries.
Similarly, it is used as a cleaning agent for steel and silicon wafers. In the petroleum industry, xylene is also a frequent component of paraffin solvents, used when the tubing becomes clogged with paraffin wax. Xylene is incompatible with strong oxidisers and is known to cause fires and explosions. There are three forms of xylene in which the methyl groups vary on the benzene ring: (i) meta-xylene, (ii) ortho-xylene, and (iii) para-xylene. These forms are referred to as isomers. Xylene is a colourless, sweet-smelling liquid. Xylene occurs naturally in petroleum and coal tar. Chemical industries produce xylene from petroleum. It is also used as a cleaning agent and a thinner for paint and in paints, in glues, in printing inks, and in varnishes. Xylene evaporates quickly from the soil and surface water into the air.

Chemical Properties

Also known as dimethylbenzene, C6H4(CH3)2 is an isomeric mixture of 0- m-, and p-xylene. It is a clear liquid with various grades having different boiling points, that is insoluble in water and soluble in alcohol and ether,and used in aviation gasoline, coatings, lacquers, rubber cements, organic synthesis, and polyester resin manufacture.

Chemical Properties

Xylene occurs in the manufacture of different petroleum products and as an impurity in benzene and toluene. It is a colorless and flammable liquid. Commercial xylene is a mixture of three isomers, namely, ortho, meta, and para isomer. It is extensively used in different industries associated with paints, rubber, inks, resins, adhesives, paper coating, solvents, and emulsifi ers. Also, xylene is used as an important raw material in the manufacture of plasticizers, glass-reinforced polyesters, and alkyd resins.

Physical properties

Xylene is benzene to which two methyl groups have been added to two carbon atoms in the benzene ring. The addition of two methyl groups gives three isomers of xylene labeled according to the relative positions of the methyl groups. Ortho-xylene has methyl groups on consecutive carbons in the ring, meta-xylene's metyl groups are separated by a single carbon bonded to hydrogen atoms, and para-xylene has the methyl groups on carbon atoms on opposite sides of the ring. The three xylene isomers are abbreviated using o-,m-, p- for ortho, meta, and para, respectively. Xylene is used both as a mixture, where it is referred to as xylenes or xylol, and as individual isomers. Because their boiling points are close, separation using distillation is difficult. Therefore isomers are separated using techniques such as recrystallization and adsorption. Xylenes are flammable, colorless liquids with a pleasant odor. Xylene was first isolated from coal tar in the mid-19th century. The name xylene comes from the Greek word for wood xulon because xylene was obtained from the distillation of wood in the absence of oxygen.

Uses

Xylene is used as a chemical feedstock in the chemical industry. Xylenes can undergooxidation where the side methyl groups are oxidized to give a carboxyl group (COOH)yielding a carboxylic acid. The particular acid produced depends on the isomer oxidized. Wheno-xylene is oxidized phthalic acid is produced, and when p-xylene is oxidized terephthalic acidresults. Terephthalic acid is one of the main feedstocks in making polyesters.Terephthalic acid reacts with ethylene glycol to form the ester polyethylene terephthalate(PET). PET is one of the most common plastics used as food and beverage containers. PETcontainers contain the recycling symbol with a number 1. PET is marketed using a numberof commercial names; the most generic of these is polyester. It is also the material known asDacron. Mylar is PET in the form of thin films. Although all three isomers of xylene are usedas chemical feedstocks, the greatest demand is for para-xylene to produce terephthalic acid.The smallest demand is for meta-xylene. Approximately 30 million tons of xylenes are usedannually worldwide.

Uses

Aviation gasoline; protective coatings; solvent for alkyd resins, lacquers, enamels, rubber cements; synthesis of organic chemicals.

Production Methods

Xylene is produced by catalytic reforming, and, depending on the feedstock, yields of >85% can be achieved. Commercially, xylene is also recovered from coal tar, yielding a typical mixture of about 10–20% ortho, 40–70% meta, and 10–25% para isomer. Impurities include ethylbenzene, benzene, toluene, phenol, thiophene, and pyridine (53, 438).

Definition

An organic hydrocarbon present in the light-oil fraction of crude oil. It is used extensively as a solvent. There are three isomeric compounds with this name and formula, distinguished as 1,2-, 1,3-, and 1,4-dimethylbenzene according to the positions of the methyl groups on the benzene ring.

General Description

A light colored to colorless liquid with a hydrocarbon odor. Flash point between 52 - 93°F. Less dense than water. Vapors are heavier than air. Vapors may irritate the eyes, nose, throat and respiratory tract. High vapor concentrations may cause central nervous system depression or damage. Liquid contact may irritate eyes and skin. Prolonged liquid contact mat result in defatting and drying of the skin. Avoid ingestion.

Air & Water Reactions

Highly flammable. Water insoluble.

Reactivity Profile

Vigorous reactions, sometimes amounting to explosions, can result from the contact between these materials and strong oxidizing agents. They can react exothermically with bases and with diazo compounds. Substitution at the benzene nucleus occurs by halogenation (acid catalyst), nitration, sulfonation, and the Friedel-Crafts reaction.

Health Hazard

Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.

Health Hazard

Exposures to xylene cause toxicity and adverse health effects to animals and humans. Acute and chronic exposure to xylene induces adverse effects on the skin and respiratory system of animals and humans. Prolonged exposure to xylene demonstrated burning effect, drying, defatting of skin, eye irritation, lung congestion, CNS excitation, depression, mucosal hemorrhage, and mild liver damage

Safety Profile

Moderately toxic by intraperitoneal and subcutaneous routes. LWdly toxic by ingestion and inhalation. An experimental teratogen. Human systemic effects by inhalation: olfactory changes, conjunctiva irritation, and pulmonary changes. Experimental reproductive effects. Mutation data reported. A human eye irritant, An experimental skin and severe eye irritant. Some temporary corneal effects are noted, as well as some conjunctival irritation by instillation (adding drops to the eyes one drop at a time). Irritation can start @ 200 ppm. A very dangerous fire hazard when exposed to heat or flame; can react with oxidzing materials. To fight fire, use foam, CO2, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes. See also other xylene entries.

Purification Methods

Usual impurities are ethylbenzene, paraffins, traces of sulfur compounds and water. It is not practicable to separate the m-, and p-isomers of xylene by fractional distillation, although, with a sufficiently efficient still, o-xylene can be fractionally distilled from a mixture of isomers. Purify (and dry) by fractional distillation from LiAlH4, P2O5, CaH2 or sodium. This treatment can be preceded by shaking successively with conc H2SO4, water, aqueous 10% NaOH, water and mercury, and drying with CaCl2 for several days. Xylene can be purified by azeotropic distillation with 2-ethoxyethanol or 2-methoxyethanol, the distillate being washed with water to remove the alcohol, then dried and fractionally distilled. [Beilstein 5 H 360.]

Xylene Preparation Products And Raw materials

Raw materials

Preparation Products


Xylene Suppliers

Global( 365)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Shaanxi Dideu Medichem Co. Ltd
+86-15319487004
+86-29-88380327 1015@dideu.com CHINA 3526 58
Shanghai Bojing Chemical Co.,Ltd.
+86-21-37122233
+86-21-37127788 Candy@bj-chem.com CHINA 497 55
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 22625 55
SHANDONG ZHI SHANG CHEMICAL CO.LTD
+86 18953170293
+86 0531-67809011 sales@sdzschem.com CHINA 2995 58
Hubei Jusheng Technology Co.,Ltd.
86-18871470254
027-59599243 linda@hubeijusheng.com CHINA 28231 58
Hubei xin bonus chemical co. LTD
86-13657291602
027-59338440 linda@hubeijusheng.com CHINA 23045 58
Chongqing Chemdad Co., Ltd
+86-13650506873
sales@chemdad.com CHINA 35434 58
CONIER CHEM AND PHARMA LIMITED
86-18523575427
sales@conier.com CHINA 47486 58
career henan chemical co
0086-371-86658258
0086-371-86658258 factory@coreychem.com CHINA 29643 58
Antai Fine Chemical Technology Co.,Limited
+86-18503026267
info@antaichem.com CHINA 9664 58

Related Qustion


View Lastest Price from Xylene manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2020-04-21 Xylene
1330-20-7
US $1.00 / KG 1KG 99% 20T Shaanxi Dideu Medichem Co. Ltd
2020-04-20 Xylene
1330-20-7
US $1.00 / KG 1KG 99% 20T Shaanxi Dideu Medichem Co. Ltd
2020-01-02 Xylene
1330-20-7
US $0.00-0.00 / 公斤 1公斤 99.0%+ 1000 tons Shaanxi Dideu Medichem Co. Ltd

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