ChemicalBook > CAS DataBase List > m-Xylene

m-Xylene

Product Name
m-Xylene
CAS No.
108-38-3
Chemical Name
m-Xylene
Synonyms
1，3-Xylene;1,3-DIMETHYLBENZENE;3-xylene;m-Xylol;META-XYLENE;Benzene,1,3-dimethyl-;2,4-Xylene;3-methyltoluene;m-XyL;M-XYLENE
CBNumber
CB4852746
Molecular Formula
C8H10
Formula Weight
106.17
MOL File
108-38-3.mol
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m-Xylene Property

Melting point:
-48 °C (lit.)
Boiling point:
138-139 °C (lit.)
Density 
0.868 g/mL at 25 °C (lit.)
vapor density 
3.7 (vs air)
vapor pressure 
16 mm Hg ( 37.7 °C)
refractive index 
n20/D 1.497(lit.)
Flash point:
77 °F
storage temp. 
2-8°C
solubility 
Miscible with many organic solvents, including alcohol and ether
form 
Liquid
pka
>15 (Christensen et al., 1975)
color 
Colorless
Odor
Like benzene; characteristic aromatic.
Odor Threshold
0.041ppm
explosive limit
1.1-7%(V)
Water Solubility 
Miscible with organic solvents. Immiscible with water.
Merck 
14,10081
BRN 
605441
Henry's Law Constant
14.80 at 45.00 °C, 17.26.4 at 50.00 °C, 19.90 at 55.00 °C, 23.01.3 at 60.00 °C, 27.46.3 at 70.00 °C (static headspace-GC, Park et al., 2004)
Dielectric constant
2.3999999999999999
Exposure limits
NIOSH REL: 100 ppm (435 mg/m3), STEL 150 ppm (655 mg/m3), IDLH 900 ppm; OSHA PEL: TWA 100 ppm; ACGIH TLV: TWA 100 ppm, STEL 150 ppm (adopted).
InChIKey
IVSZLXZYQVIEFR-UHFFFAOYSA-N
LogP
3.16 at 20℃
CAS DataBase Reference
108-38-3(CAS DataBase Reference)
NIST Chemistry Reference
Benzene, 1,3-dimethyl-(108-38-3)
EPA Substance Registry System
m-Xylene (108-38-3)
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Safety

Hazard Codes 
Xn,T,F
Risk Statements 
10-20/21-38-39/23/24/25-23/24/25-11-36/38
Safety Statements 
25-45-36/37-16-7
RIDADR 
UN 1307 3/PG 3
OEB
A
OEL
TWA: 100 ppm (435 mg/m3), STEL: 150 ppm (655 mg/m3)
WGK Germany 
2
RTECS 
ZE2275000
Autoignition Temperature
982 °F
TSCA 
Yes
HazardClass 
3
PackingGroup 
II
HS Code 
29024200
Hazardous Substances Data
108-38-3(Hazardous Substances Data)
Toxicity
LD50 orally in rats: 7.71 ml/kg (Smyth)
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H226Flammable liquid and vapour

H304May be fatal if swallowed and enters airways

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

H412Harmful to aquatic life with long lasting effects

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P331Do NOT induce vomiting.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
8.22337
Product name
m-Xylene
Purity
for synthesis
Packaging
1L
Price
$108
Updated
2024/03/01
Sigma-Aldrich
Product number
8.22337
Product name
m-Xylene
Purity
for synthesis
Packaging
2.5L
Price
$226
Updated
2024/03/01
Sigma-Aldrich
Product number
185566
Product name
m-Xylene
Purity
ReagentPlus , 99%
Packaging
1l
Price
$204
Updated
2024/03/01
Sigma-Aldrich
Product number
185566
Product name
m-Xylene
Purity
ReagentPlus , 99%
Packaging
4l
Price
$501
Updated
2024/03/01
Sigma-Aldrich
Product number
40202
Product name
m-Xylene solution
Purity
certified reference material, 5000?μg/mL in methanol
Packaging
1mL
Price
$55.4
Updated
2022/05/15
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m-Xylene Chemical Properties,Usage,Production

Description

Xylene exists in three isomeric forms, ortho-,meta-, and para-xylene. Commercial xylene is a mixture ofthese three isomers and may also contain ethylbenzene aswell as small amounts of toluene, trimethylbenzene, phenol,thiophene, pyridine, and other nonaromatic hydrocarbons.m-Xylene is predominant in commercial xylene. The physical properties of the three isomers are as follows:Isomer MeltingPoint(℃)BoilingPoint(℃)FlashPoint(℃)LowerExpl.(%)UpperExpl.(%)AutoTemp.(℃)ortho- -25 144 32 0.9 6.7 463meta- -48 139 27 1.1 7.0 527para- 13 138 27 1.1 7.0 528

Chemical Properties

clear colourless liquid

Chemical Properties

Xylene exists in three isomeric forms, ortho-, meta-, and para-xylene. Commercial xylene is a mixture of these three isomers and may also contain ethylbenzene as well as small amounts of toluene, trimethylbenzene, phenol, thiophene, pyridine, and other nonaromatic hydrocarbons. m-Xylene is predominant in commercial xylene.

Physical properties

Clear, colorless, watery liquid with a sweet, aromatic odor. An odor threshold concentration of 48 ppbv was reported by Nagata and Takeuchi (1990).

Uses

Meta-Xylene is used for the production of isophthalic acid, of agriculture chemicals as pharmaceuticals. It finds applications in paint and varnish removers and aerosol paint concentrates. Product Data Sheet

Uses

m-Xylene is used in the production of isophthalic acid, which is a monomer and utilized in preparation of polyethylene terephthalate. It is used as an important starting material in the production of 2,4- and 2,6-xylidine. It is used as solvent in histology.

Uses

These Secondary Standards are qualified as Certified Reference Materials. These are suitable for use in several analytical applications including but not limited to pharma release testing, pharma method development for qualitative and quantitative analyses, food and beverage quality control testing, and other calibration requirements.

Definition

ChEBI: A xylene carrying methyl groups at positions 1 and 3.

Synthesis Reference(s)

Journal of the American Chemical Society, 79, p. 2910, 1957 DOI: 10.1021/ja01568a059

General Description

A colorless watery liquid with a sweet odor. Less dense than water. Insoluble in water. Irritating vapor.

Air & Water Reactions

Highly flammable. Insoluble in water.

Reactivity Profile

m-Xylene may react with oxidizing materials. .

Health Hazard

Vapors cause headache and dizziness. Liquid irritates eyes and skin. If taken into lungs, causes severe coughing, distress, and rapidly developing pulmonary edema. If ingested, causes nausea, vomiting, cramps, headache, and coma; can be fatal. Kidney and liver damage can occur.

Fire Hazard

Behavior in Fire: Vapor is heavier than air and may travel considerable distance to a source of ignition and flash back.

Flammability and Explosibility

Flammable

Chemical Reactivity

Reactivity with Water No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

Safety Profile

Moderately toxic by intraperitoneal route. Wdly toxic by ingestion, skin contact, and inhalation. An experimental teratogen. Human systemic effects by inhalation: motor activity changes, ataxia, and irritabihty. Experimental reproductive effects. A severe skin irritant. A common air contaminant. A very dangerous fire hazard when exposed to heat or flame; can react with oxidzing materials. Explosive in the form of vapor when exposed to heat or flame. To fight fire, use foam, CO2, dry chemical. Emitted from modern building materials (CENEAR 69,22,91). When heated to decomposition it emits acrid smoke and irritating fumes. See also other xylene entries.

Potential Exposure

Xylene is used as a solvent; as a constituent of paint, lacquers, varnishes, inks, dyes, adhesives, cements, cleaning fluids, and aviation fuels; and as a chemical feed-stock for xylidines, benzoic acid; phthalic anhydride; isophthalic, and terephthalic acids; as well as their esters (which are specifically used in the manufacture of plastic materials and synthetic textile fabrics). Xylene is also used in the manufacture of quartz crystal oscillators, hydrogen peroxide; perfumes, insect repellants; epoxy resins; pharmaceuticals; and in the leather industry. m-Xylene is used as an intermediate in preparation of isophthalic acid; o-xylene is used in manufacture of phthalic anhydride and in pharmaceutical and insecticide synthesis. p-xylene is used in pharmaceutical and insecticide synthesis and in production of polyester.

First aid

If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seekmedical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately.If this chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medicalfacility. If victim is conscious, administer water or milk. Donot induce vomiting.Note to physician: May require supportive measures forpulmonary edema.

Source

As m+p-xylene, detected in distilled water-soluble fractions of 87 octane gasoline, 94 octane gasoline, and Gasohol at concentrations of 7.00, 20.1, and 14.6 mg/L, respectively (Potter, 1996); in distilled water-soluble fractions of new and used motor oil at concentrations of 0.26 to 0.29 and 302 to 339 μg/L, respectively (Chen et al., 1994). The average volume percent and estimated mole fraction in American Petroleum Institute PS-6 gasoline are 4.072 and 0.04406, respectively (Poulsen et al., 1992). Diesel fuel obtained from a service station in Schlieren, Switzerland contained m/p-xylene at a concentration of 336 mg/L (Schluep et al., 2001).
Thomas and Delfino (1991) equilibrated contaminant-free groundwater collected from Gainesville, FL with individual fractions of three individual petroleum products at 24–25 °C for 24 h. The aqueous phase was analyzed for organic compounds via U.S. EPA approved test method 602. Average m+p-xylene concentrations reported in water-soluble fractions of unleaded gasoline, kerosene, and diesel fuel were 8.611, 0.658, and 0.228 mg/L, respectively. When the authors analyzed the aqueous-phase via U.S. EPA approved test method 610, average m+p-xylene concentrations in water-soluble fractions of unleaded gasoline, kerosene, and diesel fuel were lower, i.e., 6.068, 0.360, and 0.222 mg/L, respectively.
Based on laboratory analysis of 7 coal tar samples, m+p-xylene concentrations ranged from ND to 6,000 ppm (EPRI, 1990). A high-temperature coal tar contained m-xylene at an average concentration of 0.07 wt % (McNeil, 1983).
Schauer et al. (2001) measured organic compound emission rates for volatile organic compounds, gas-phase semi-volatile organic compounds, and particle-phase organic compounds from the residential (fireplace) combustion of pine, oak, and eucalyptus. The gas-phase emission rate of m-xylene + p-xylene was 60.0 mg/kg of pine burned. Emission rates of both isomers were not measured during the combustion of oak and eucalyptus.
Drinking water standard (final): For all xylenes, the MCLG and MCL are both 10 mg/L. In addition, a DWEL of 70 mg/L was recommended (U.S. EPA, 2000).

Environmental Fate

Biological. Microbial degradation produced 3-methylbenzyl alcohol, 3-methylbenzaldehyde, mtoluic acid, and 3-methylcatechol (quoted, Verschueren, 1983). m-Toluic acid was reported to be the biooxidation product of m-xylene by Nocardia corallina V-49 using n-hexadecane as the substrate (Keck et al., 1989). Reported biodegradation products of the commercial product containing xylene include α-hydroxy-p-toluic acid, p-methylbenzyl alcohol, benzyl alcohol, 4- methylcatechol, m- and p-toluic acids (Fishbein, 1985). In anoxic groundwater near Bemidji, MI, m-xylene anaerobically biodegraded to the intermediate m-toluic acid (Cozzarelli et al., 1990). In gasoline-contaminated groundwater, methylbenzylsuccinic acid was identified as the first intermediate during the anaerobic degradation of xylenes (Reusser and Field, 2002).
Photolytic. When synthetic air containing gaseous nitrous acid and m-xylene was exposed to artificial sunlight (λ = 300–450 nm) biacetyl, peroxyacetal nitrate, and methyl nitrate were formed (Cox et al., 1980). They reported a rate constant of 1.86 x 10-11 cm3/molecule?sec for the reaction of gaseous m-xylene with OH radicals based on a value of 8 x 10-12 cm3/molecule?sec for the reaction of ethylene with OH radicals.
Chemical/Physical. Under atmospheric conditions, the gas-phase reaction with OH radicals and nitrogen oxides resulted in the formation of m-tolualdehyde, m-methylbenzyl nitrate, nitro- mxylenes, 2,4- and 2,6-dimethylphenol (Atkinson, 1990). Kanno et al. (1982) studied the aqueous reaction of m-xylene and other aromatic hydrocarbons (benzene, toluene, o- and p-xylene, and naphthalene) with hypochlorous acid in the presence of ammonium ion. They reported that the aromatic ring was not chlorinated as expected but was cleaved by chloramine forming cyanogen chloride. The amount of cyanogen chloride formed increased at lower pHs (Kanno et al., 1982). In the gas phase, m-xylene reacted with nitrate radicals in purified air forming pmethylbenzaldehyde, an aryl nitrate and trace amounts of 2,6-dimethylnitrobenzene, 2,4- dimethylnitrobenzene, and 3,5-dimethylnitrobenzene (Chiodini et al., 1993).

storage

Color Code—Red: Flammability Hazard: Store ina flammable liquid storage area or approved cabinet awayfrom ignition sources and corrosive and reactive materials.Prior to working with this chemical you should be trainedon its proper handling and storage. Xylenes must be storedto avoid contact with strong oxidizers (such as chlorine,bromine, and fluorine) since violent reactions occur.Sources of ignition, such as smoking and open flames, areprohibited where xylenes are used, handled, or stored in amanner that could create a potential fire or explosionhazard. Use only nonsparking tools and equipment, especially when opening and closing containers of xylenes.Protect storage containers from physical damage.

Shipping

UN1307 Xylenes, Hazard Class: 3; Labels: 3-Flammable liquid.

Purification Methods

The general purification methods listed under xylene are applicable. The o-and p-isomers can be removed by their selective oxidation when a m-xylene sample containing them is boiled with dilute HNO3 (one part conc acid to three parts water). After washing with water and alkali, the product can be steam distilled, collected as for o-xylene, then distilled and purified further by sulfonation. [Clarke & Taylor J Am Chem Soc 45 831 1923.] m-Xylene is selectively sulfonated when a mixture of xylenes is refluxed with the theoretical amount of 50-70% H2SO4 at 85-95o under reduced pressure. By using a still resembling a Dean and Stark apparatus, water in the condensate can be progressively withdrawn while the xylene is returned to the reaction vessel. After cooling, then adding water, unreacted xylenes are distilled off under reduced pressure. The m-xylene sulfonic acid is subsequently hydrolysed by steam distillation up to 140o, the free m-xylene is washed, dried with silica gel and again distilled. It is stored over molecular sieves Linde type 4A. [Beilstein 5 H 370, 5 I 182, 5 II 287, 5 III 823, 5 IV 932.]

Incompatibilities

Vapor may form explosive mixture with air. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, and epoxides. Electrostatic charges can be generated from agitation or flow.

Waste Disposal

Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform with EPA regulations governing storage, transportation, treatment, and waste disposal. Incineration.

m-Xylene Preparation Products And Raw materials

Raw materials

Xylene P-XYLENE Y type molecular sieve COAL TAR Adsorbent Hydrogen

Preparation Products

3,5-Dimethylphenol AMITRAZ METABOLITE HYDROCHLORIDE o-Xylene P-XYLENE 1-tert-Butyl-3,5-dimethylbenzene Musk xylene 2',4'-Dimethylacetophenone Isophthalic acid 4-BROMO-3-METHYLBENZAMIDE 3-Methylbenzyl chloride 1,3-Dicyanobenzene Chlorothalonil 2,6-Dicyano-4-Nitroaniline m-Toluic acid 1,4-BIS(TRICHLOROMETHYL)BENZENE 4-Nitro-1,3-dimethylbenzene 2,6-Dimethyl-1-nitrobenzene Metalaxyl 1,3-Bis(trifluoromethyl)-benzene Pyromellitic Dianhydride Musk ketone 2,4-Dimethylphenol ISOCYANATO(METHOXY)METHANE 4-TERT-BUTYL-2,6-DIMETHYL BENZYL ACETATE 2,4-Dimethyl aniline 1,2,4,5-Tetramethylbenzene 2,6-Dimethylaniline 4-Tert-butyl-2,6-dimethylbenzylchloroide 4-TERT-BUTYL-3-HYDROXY-2,6-DIMETHYLPHENYLACETONITRILE Diphenyl isophthalate Amitraz 2-(Dimethylamino)ethyl (4-chlorphenoxy)acetate
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m-Xylene Suppliers

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Chengdu RunZeBenTu Chemical Co., Ltd
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028-88469284 18000562381
Email
rzbtsj@163.com
Country
China
ProdList
9951
Advantage
56
CHMA Chemical Technology (Shanghai) Co., Ltd
Tel
021-61556450 15800904410
Fax
021-61556450
Country
China
ProdList
2832
Advantage
58
Codow Chemical Co.,Ltd.
Tel
18620099427
Fax
+86-20-62619665
Email
amy@howeipharm.com
Country
China
ProdList
17687
Advantage
55
Shanghai Xilong Biochemical Technology Co., Ltd.
Tel
021-52907766-8042
Fax
021-52906523
Country
China
ProdList
9941
Advantage
58
Shandong Xiya Chemical Co., Ltd.
Tel
4009903999 13395398332
Fax
0539-6365991
Email
sales@xiyashiji.com
Country
China
ProdList
20806
Advantage
60
Chengdu Dianchun Technology Co., Ltd
Tel
400-1166-196 18502815961
Fax
QQ：800101999
Email
cdhxsj@163.com
Country
China
ProdList
14603
Advantage
60
Grader reagent
Tel
18221735425
Email
sales@xinpingchem.com
Country
China
ProdList
9942
Advantage
58
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View Lastest Price from m-Xylene manufacturers

Hebei Weibang Biotechnology Co., Ltd
Product
m-Xylene 108-38-3
Price
US $10.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
100 mt
Release date
2024-11-14
Hebei Chuanghai Biotechnology Co,.LTD
Product
m-Xylene 108-38-3
Price
US $10.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
10 ton
Release date
2024-08-20
Henan Fengda Chemical Co., Ltd
Product
m-Xylene 108-38-3
Price
US $100.00-1.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
g-kg-tons, free sample is available
Release date
2023-12-25

108-38-3, m-XyleneRelated Search:

DIMETHYLBENZENE,Dimethylbenzene(mixture 2,4/2,6-Diaminotoluene Isophthalic acid m-Phthalaldehyde 5-NITRO-M-XYLENE-ALPHA,ALPHA'-DIOL 1-(1-chloroethyl)-2,3-dimethylbenzene 5-BROMO-3,5-DIMETHYLBENZENE,5-BROMO-M-XYLENE 3,5-Bis(trifluoromethyl)phenol 3'-(Trifluoromethyl)acetophenone 3,5-Bis(trifluoromethyl)benzoyl chloride 1-BROMO-2,3,5,6-TETRAMETHYLBENZENE 2,4,6-Trimethybromombenzene 3,3'-BIS(TRIFLUOROMETHYL)BENZOPHENONE 3-(TRIFLUOROMETHYL)BENZOPHENONE 3,5-Bis(trifluoromethyl)benzoic acid A,A,A,A',A',A'-HEXAFLUORO-M-XYLENE 3,5-Bis(trifluoromethyl)benzonitrile 2,4-Dimethylphenol

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