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Xylol, Isomerengemisch Produkt Beschreibung

Xylene Struktur
1330-20-7
CAS-Nr.
1330-20-7
Bezeichnung:
Xylol, Isomerengemisch
Englisch Name:
Xylene
Synonyma:
XyL;enes;XYLOL;ksylen;xiloli;xylole;XYLENE;Xylener;violet3;xylenen
CBNumber:
CB0130912
Summenformel:
C8H10
Molgewicht:
106.17
MOL-Datei:
1330-20-7.mol

Xylol, Isomerengemisch Eigenschaften

Schmelzpunkt:
-34 °C
Siedepunkt:
137-140 °C (lit.)
Dichte
0.86 g/mL at 25 °C (lit.)
Dampfdichte
3.7 (vs air)
Dampfdruck
18 mm Hg ( 37.7 °C)
Brechungsindex
n20/D 1.497(lit.)
Flammpunkt:
77 °F(lit.)
storage temp. 
Flammables area
Aggregatzustand
Liquid
Farbe
APHA: ≤10
Explosionsgrenze
7%
Wasserlöslichkeit
<0.1 g/L (20 ºC)
Merck 
14,10081
BRN 
1901563
InChIKey
KAKOUNRRKSHVJO-UHFFFAOYSA-N
CAS Datenbank
1330-20-7(CAS DataBase Reference)
IARC
3 (Vol. 47, 71) 1999
EPA chemische Informationen
Xylene (1330-20-7)
Sicherheit
  • Risiko- und Sicherheitserklärung
  • Gefahreninformationscode (GHS)
Kennzeichnung gefährlicher Xn,F
R-Sätze: 10-20/21-38-36/38-65-48/20
S-Sätze: 25-36/37-62
RIDADR  UN 1307 3/PG 3
WGK Germany  2
RTECS-Nr. ZE2100000
Selbstentzündungstemperatur 867 °F
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29024400
Giftige Stoffe Daten 1330-20-7(Hazardous Substances Data)
Toxizität LD50 oral in rat: 4300mg/kg
Bildanzeige (GHS)
Alarmwort Achtung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H226 Flüssigkeit und Dampf entzündbar. Entzündbare Flüssigkeiten Kategorie 3 Warnung
H303 May be harmfulif swallowed Acute toxicity,oral Category 5 P312
H304 Kann bei Verschlucken und Eindringen in die Atemwege tödlich sein. Aspirationsgefahr Kategorie 1 Achtung
H312 Gesundheitsschädlich bei Hautkontakt. Akute Toxizität dermal Kategorie 4 Warnung P280,P302+P352, P312, P322, P363,P501
H315 Verursacht Hautreizungen. Hautreizung Kategorie 2 Warnung P264, P280, P302+P352, P321,P332+P313, P362
H319 Verursacht schwere Augenreizung. Schwere Augenreizung Kategorie 2 Warnung P264, P280, P305+P351+P338,P337+P313P
H332 Gesundheitsschädlich bei Einatmen. Akute Toxizität inhalativ Kategorie 4 Warnung P261, P271, P304+P340, P312
H335 Kann die Atemwege reizen. Spezifische Zielorgan-Toxizität (einmalige Exposition) Kategorie 3 (Atemwegsreizung) Warnung
H373 Kann die Organe schädigen bei längerer oder wiederholter Exposition. Spezifische Zielorgan-Toxizität (wiederholte Exposition) Kategorie 2 Warnung P260, P314, P501
H412 Schädlich für Wasserorganismen, mit langfristiger Wirkung. Langfristig (chronisch) gewässergefährdend Kategorie 3 P273, P501
Sicherheit
P210 Von Hitze, heißen Oberflächen, Funken, offenen Flammen und anderen Zündquellenarten fernhalten. Nicht rauchen.
P260 Dampf/Aerosol/Nebel nicht einatmen.
P262 Nicht in die Augen, auf die Haut oder auf die Kleidung gelangen lassen.
P280 Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.
P331 KEIN Erbrechen herbeiführen.
P301+P310 BEI VERSCHLUCKEN: Sofort GIFTINFORMATIONSZENTRUM/Arzt/... (geeignete Stelle für medizinische Notfallversorgung vom Hersteller/Lieferanten anzugeben) anrufen.
P302+P352 BEI BERÜHRUNG MIT DER HAUT: Mit viel Wasser/... (Hersteller kann, falls zweckmäßig, ein Reinigungsmittel angeben oder, wenn Wasser eindeutig ungeeignet ist, ein alternatives Mittel empfehlen) waschen.
P305+P351+P338 BEI KONTAKT MIT DEN AUGEN: Einige Minuten lang behutsam mit Wasser spülen. Eventuell vorhandene Kontaktlinsen nach Möglichkeit entfernen. Weiter spülen.
P370+P378 Bei Brand: zum Löschen verwenden.

Xylol, Isomerengemisch Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:

R10:Entzündlich.
R20/21:Gesundheitsschädlich beim Einatmen und bei Berührung mit der Haut.
R38:Reizt die Haut.
R36/38:Reizt die Augen und die Haut.

S-Sätze Betriebsanweisung:

S25:Berührung mit den Augen vermeiden.

Beschreibung

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.

Chemische Eigenschaften

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.

Chemische Eigenschaften

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.

Physikalische Eigenschaften

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.

Verwenden

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.

Verwenden

Solvent; manufacture of certain organic compounds; cleaning agent; component of fuels.

Verwenden

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

Vorbereitung Methode

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.

Allgemeine Beschreibung

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 Reaktionen

Highly flammable. Water insoluble.

Reaktivität anzeigen

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

Sicherheitsprofil

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.

Carcinogenicity

Mixed xylene and the individual xylene isomers have tested negative in a wide variety of genotoxic assays; they are considered to be nonmutagenic. The IARC has determined that there is inadequate evidence in humans and experimental animals for the carcinogenicity of xylenes.

Environmental Fate

Xylene is an eight carbon aromatic hydrocarbon compound that is a minor component of all gasoline. Xylene is a colorless, flammable liquid that is about 14% lighter than water. It has a sweet, pungent odor. Xylene has a molecular weight of 106.7 g mol1. At 25 C, xylene has a solubility in water of 106 mg l1, an estimated vapor pressure of 6.6–8.8mm Hg and a Henry’s law constants ranging from 5.18  103 to 7.18  103 atm-m3 mole1. The log octanol/ water partition coefficient is 3.12. Conversion factors for xylene in air are as follows: 1 mgm3 ? 0.23 ppm; 1 ppm? 4.36 mgm3.
If released to air, the moderate vapor pressure predicts xylene will exist solely as a vapor in the ambient atmosphere. Vapor-phase xylene will be degraded in the atmosphere by a reaction with photochemically produced hydroxyl radicals; the half-life for this reaction in air is estimated to be 2 days. Xylenes do not contain chromophores that absorb at wavelengths >290 nm and therefore are not expected to be susceptible to direct photolysis by sunlight.
If released into water, xylene would only moderately adsorb to suspended solids and sediment based upon an estimated Koc range of 36–365. Volatilization from water surfaces is expected to be the dominant fate process based upon the estimated Henry’s law constant. Estimated volatilization half-lives for a model river and model lake are 1 h and 4 days, respectively. Using a standard biochemical oxygen demand (BOD) dilution technique and an activated sewage inoculum, a theoretical BOD of 72% was observed over a 20-day incubation period for a mixture of xylene isomers, suggesting that biodegradation is an important environmental fate process in water. Hydrolysis is not expected to be an important environmental fate process since this compound lacks functional groups that hydrolyze under environmental conditions.
If released to soil, xylene is expected to have high to moderate mobility in the subsurface based upon the range of known Koc values. Volatilization of xylene from moist soil surfaces is expected to be an important fate process. Xylene may volatilize from dry soil surfaces based on the moderate vapor pressure.
Using a measured log Kow of 3.12, the USEPA’s EPI Suite computer program estimates both a bioconcentration factor and a bioaccumulation factor of 110.7. These predicted bioaccumulation and biomagnifications values are relatively low.
Xylene would therefore not be expected to be found in the tissues of fish or wildlife as (1) xylene contains no persistent functional groups (e.g., chlorine, bromine); (2) exposure would be expected to be low based on a low half-life in the environment; and (3) subsequent to exposure, trace levels of xylene would be rapidly metabolized by the liver (similar to what is seen with other organic compounds).

läuterung methode

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.]

Toxicity evaluation

The mechanism of toxicity is suspected to be similar to other solvents that rapidly induce anesthesia-like effects, i.e., a ‘nonspecific narcosis’ due to disruption (solvation) of the integrity of the cellular membranes of the central nervous system (CNS). The effect is similar to the ‘high’ experienced upon exposure to other hydrocarbon solvents.
As seen with exposure to other hydrocarbon solvents, upon inhalation, xylene is moderately toxic and may cause irritation of the respiratory tract and narcosis. Xylene appears to produce reversible effects upon the liver, renal, and nervous systems. The nervous system appears to be the most sensitive to the effects of xylene. High level xylene exposures produced incoordination, ataxia, unconsciousness and eventually, death. Lower level acute exposures in man produce dizziness, exhilaration, and confusion. Although the actual biochemical mechanism of toxicity has not been discerned, the narcotic effects seen are most likely related to its physical solvent properties.

Xylol, Isomerengemisch Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


Xylol, Isomerengemisch Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global( 406)Lieferanten
Firmenname Telefon Fax E-Mail Land Produktkatalog Edge Rate
Shaanxi Dideu Medichem Co. Ltd
15319487004
029-88380327 1015@dideu.com CHINA 3994 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 22607 55
Hangzhou FandaChem Co.,Ltd.
008615858145714
+86-571-56059825 fandachem@gmail.com CHINA 9143 55
Hubei Jusheng Technology Co.,Ltd.
86-18871470254
027-59599243 linda@hubeijusheng.com CHINA 28229 58
Hubei xin bonus chemical co. LTD
86-13657291602
027-59338440 linda@hubeijusheng.com CHINA 23035 58
Shanghai Longyu Biotechnology Co., Ltd.
+8615821988213
+86 15821988213 info@longyupharma.com China 2514 58
Chongqing Chemdad Co., Ltd
+86-13650506873
sales@chemdad.com CHINA 37282 58
CONIER CHEM AND PHARMA LIMITED
86-18523575427
sales@conier.com China 47498 58
career henan chemical co
15093356674 0371-55982848
0086-371-86658258 factory@coreychem.com CHINA 29863 58

1330-20-7(Xylol, Isomerengemisch)Verwandte Suche:


  • SCINTILENE COCKTAIL
  • SCINTIVERSE E COCKTAIL
  • SCINTIVERSE I COCKTAIL
  • SEALIT SEALANT
  • NAPHTHA SOLVENT
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  • XYLENE MIXTURE OF ISOMERS TECHNICAL 5 L
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  • XYLENES DRY (MAX. 0.005% WATER)
  • XYLENES EXTRA PURE
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  • XyleneGr
  • Xylenes,Acs
  • mixtureofisomers
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  • Xylenes, for analysis ACS, 99%
  • Xylenes, mixed isomers with ethylbenzene, pure, 96%
  • Xylenes, mixed, electronic use grade, for residue analysis, 99+%
  • Xylenes, mixture of isomers, extra pure
  • Xylenes, mixture of isomers, for analysis, 98+%
  • Xylenes, mixture of isomers, pure, 98%
  • XYLENES REAGENT (ACS)
  • dimethylbenzenes + ethylbenzene
  • xylenes, semiconductor grade
  • XYLENES,ELECTRONIC/CLEANROOMGRADE
  • XYLENES,HISTOLOGICALACS(BULK
  • XYLENES,LABORATORY(BULK
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  • Dimethylbenzene, isomers
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  • Xylenes, for analysis ACS, 99% 500ML
  • Xylenes, Mixed isoMers, AcroSeal, Extra Dry, 98+% 100ML
  • Xylene ,Xylol
  • MIXEDXYLENES
  • TECHNICALXYLENE
  • XYLOL UNVERST.
  • Xylenes, 99%, for biocheMistry and histology, Mixed isoMers with ethylbenzene, AcroSeal
  • Xylenes, SuperDry, Mixed isoMers, J&KSeal
  • Xylenes, ACS reagent
  • Xylenes, 99%, SpcDry, with Molecular sieves, Water≤50 ppM (by K.F.), SpcSeal
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