1. Also, it can be prepared from toluene by employing ZSM (Zeolite Feb 10, 2021 · Xylene is commonly used as a paint solvent because it’s excellent at removing old paint on a variety of surfaces. Most mixed xylenes contain ethylbenzene, except for a small volume produced by toluene disproportionation (Ransley, 1984). It is obtained primarily from crude petroleum. The xylenes from coal-tar consists of 45-70% m-xylene, 23% p-xylene, 10-15% o-xylene and 6-10% ethylbenzene. , electrostatic charges can be generated. 1 o-Xylene and its derivatives 7. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. 6 μg/kg/day from inhalation exposure and 0. Information on this page: m-, o-, and p-Xylene are the three isomers of xylene; commercial or mixed xylene usually contains about 40-65% m-xylene and up to 20% each of o- and p-xylene and ethylbenzene. 1650. These chemicals are used as received without further purification. Generally, industrial xylene is used as a blend of those three isomers, commonly referred to as mixed xylene. Drawings of the three different isomers are shown in Chapter 4. Information on this page: As xylene monooxygenase from Pseudomonas synxantha S2TR-26 and catechol 2,3-dioxygenase from Pseudomonas mandelii S2TR-08, have a matching end product, they acted in symphony to degrade p-xylene. Xylene is among the 30 most abundantly produced chemicals in the United States. 281°F. Wang, Liu, et al. 2. These isomers differ only in placement of two methyl groups on a benzene ring. Solubility in water: none. Although this compound is insoluble in water, it pollutes the marine environment. Xylene uses were discovered by Auguste Cahours, a French chemist, in 1850. G. Boiling point. Oct 27, 2009 · p -Xylene was first isolated from a wood distillate in 1850; today it is a widely produced petrochemical. Xylene is a common component of solvents used in the printing, painting, rubber, leather and agricultural industries. Material Safety Data Sheet or SDS for p-Xylene 808691 from MilliporeSigma for download or viewing in the browser. 733 Third Ave. of p-xylene has received more and more attention, since it is widely used in chem. ©Q a eaaH eaaH o a ©leooH ~ \\ a eaaH Phthalic anhydride (PAl I. Step [1]: CH SO. kJ/mol: G+TS: Bartmess, Scott, et al. Belg. 2 p -Xylene is an isomeric form of xylene. Apr 6, 2021 · Colorless liquid with an aromatic odor. It acts as a clearing agent, removing lipids and dehydrating tissues before embedding them in paraffin wax. Xylene is a colourless liquid, with a strong, sweet odour. Boiling point: 138°C. Dur Apr 4, 2023 · Xylene: Learn its Structure, Preparation, Properties and Uses. , 1957, 66, 375-81. , 1968, 40, 527, 549-557. Mixed xylenes are common industrial solvents, but the para isomer is the starting material for terephthalic acid, one of the monomers used in polyester production. IUPAC Standard InChI: InChI=1S/C8H10/c1-7-3-5-8 (2)6-4-7/h3-6H,1-2H3. This Review focuses on materials Other names: Benzene, 1,4-dimethyl-; p-Dimethylbenzene; p-Xylol; 1,4-Dimethylbenzene; 1,4-Xylene; p-Methyltoluene; para-Xylene; Chromar; Scintillar; 4-Methyltoluene; NSC 72419; UN 1307; 1,4-dimethyl-benzene ( p-xylene) Permanent link for this species. (4) Anderson, D. Uses advised against: none; Company Identification. ) Simon, M. through toluene alkylation is considered to be more promising due to high selectivity of p-xylene and little environmental impact compared to other methods. 06 μg/kg/day from ingestion of drinking water assuming typical low background levels. The demand for isophthalic acid is relatively modest so m-xylene is rarely sought (and hence the utility of its conversion to the o- and p-isomers). U. Description. The term total xylenes refers to all three isomers of xylene (m-, o-, and p Oct 14, 2020 · A recent study indicates that xylene is commonly found in the soil, water, and air. 05. P270 Do not eat, drink or smoke when using this product. The xylene isomers are distinguished by the designations ortho – (or o –), meta – (or m –), and para – (or Apr 9, 2024 · The mixed xylene obtained from the top of the stabilization Tower enters the adsorption separation section, and the non-molecular sieve solid adsorbent is used to adsorb p-xylene, and the p-xylene product with a purity of 99. Synonyms: Dimethylbenzene, Xylol, Dimethylbenzene (mixed isomers), Xylenes (o-, m-, p-isomers) m-xylene (CASR# 108-38-3), o-xylene (CASR# 95-47-6), p-xylene (CASR# 106-42-3) Physical properties. Its boiling point is approximately 138-144°C (depending on the isomer), and its melting point varies from -25°C to 13°C. The p-xylene prodn. Aug 9, 2020 · 27. [ all data ] Ferrand, 1962 Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others. Chemistry questions and answers. Molecular weight. Xylene is a popular solvent because of its diverse range of uses in various Acute systemic toxicity can result from ingestion of xylene. Vapor pressure. It is specifically classified as an aromatic hydrocarbon and is a colorless solvent with a sweet, gas-like smell and a greasy texture. 859. Formula: C 8 H 10. This is due to the fact that xylene doesn’t Dec 26, 2023 · p-xylene is an aromatic hydrocarbon based on benzene with two methyl substituents with the chemical formula C8H10 or C6H4 (CH3)2. Commercial-grade (mixed) xylene typically is composed of approximately 20% ortho-xylene, 40% Jul 21, 2014 · Chemical separation has great importance in industrial applications. Column type Active phase Temperature (C) I Reference Comment; Capillary: HP-1: 0. PX is one of the most widely used aromatic compounds accounting for almost 86% of the total mixed Other names: Benzene, 1,4-dimethyl-; p-Dimethylbenzene; p-Xylol; 1,4-Dimethylbenzene; 1,4-Xylene; p-Methyltoluene; para-Xylene; Chromar; Scintillar; 4-Methyltoluene; NSC 72419; UN 1307; 1,4-dimethyl-benzene ( p-xylene) Permanent link for this species. FL 21New York, NY10017 USA TEL: (212) 752-2020FAX: (212) 821 0025 1. , 1979: gas phase; value altered from reference due to change in acidity scale; B Dec 30, 2023 · Product name: P-XYLENE; CBnumber: CB2136488; CAS: 106-42-3; EINECS Number: 203-396-5; Synonyms: p-xylene,para-xylene; Relevant identified uses of the substance or mixture and uses advised against. 3 ± 0. Go To: Top Data from NIST Standard Reference Database 69: NIST Chemistry WebBook The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. Prolonged exposure to xylene leads to significant amount of solvent α,α'-dimethoxy-p-xylene. Chemistry. Xylene exists in three forms o-xylene, m-xylene, and p-xylene. e. 1 ppm. 4°C; o-xylene -25. Description; Catalogue Number: 108684: Synonyms: 1,4-Dimethylbenzene: Description: p-Xylene: Overview: EMSURE® grade solvents are suitable for a broad spectrum of classical lab applications, and are frequently used in regulated and highly demanding lab applications. Melting Point: m-xylene -47. xylene concentration in indoor p-xylene. 9 mmHg for m and p-xylene, 7 mmHg for o-xylene. 5: K: AVG: N/A: Average of 59 out of 65 values; Individual data points Quantity Value Units Method Reference Comment; T fus: 286. 106. On exposure the vapours are rapidly absorbed through the lungs and the slowly through the skin. There are three forms of xylene in which the methyl groups vary on the benzene ring: meta-xylene, ortho-xylene, and para-xylene (m-, o-, and p-xylene). Formula: C 6 H 4 (CH 3) 2 / C 8 H 10. fiber, and pesticide industries. ophthalic acid T erephthalic acid 7. A similar synthesis for parylene N uses the precursor α,α'-dimethoxy-p-xylene. [Note: A solid below 56°F. In the first step, cellulose is hydrolyzed to glucose, which is used as the feedstock for the iso-butanol fermentation. A novel Zn( … Jan 24, 2024 · In terms of physical properties, xylene is a colorless liquid with a sweet odor. The “p” stands for para, identifying that he two methyl groups in p-xylene occupy the diametrically opposite substituent positions Xylene (Fig. 9% is obtained by desorption, and the by-product is m-xylene. , USe of Kovats retention indices and response factors for the qualitative and quantitative analysis of coating solvents, J. Use curved arrows to show the flow of electrons. Principal components Szz and Sxx - Syy of the second rank orientational ordering matrix of these Dec 4, 2000 · Abstract. 1 Oxidation of o-xylene to phthalic anhydride Phthalic acid was discovered by the French chemist Auguste Laurent in 1836. Today, this substance has various applications in chemistry and Simon, M. 2°C; p-xylene 13-14°C; mixed -48°C Krotov and Chebotar (1972) did not find any developmental defects in fetuses of rats that had inhaled xylene. Reacts with strong acids and strong oxidants. Myers, Webmaster of ACS Division of Organic Division (DOC) from: Professor Murov's Organic solvent table. It is widely used as a degreasing agent and as a thinner and solvent in paints, inks, adhesives, and many other products. Industrial & Engineering Chemistry Research 2020 , 59 (3) , 1038-1044. 4 ± 0. The term total xylenes refers to all three isomers of xylene (m-, o-, and p The average daily intake of total xylene (sum of o-, m-, and p-xylene intakes) for the general population is estimated as 0. 4 Abstract. Flash point. Xylene is an organic compound having an aromatic benzenoid ring in its backbone. Uses advised Aug 2, 2023 · Meta-xylene, para-xylene, ortho-xylene, and ethylbenzene chemicals were purchased from Merck company with the purity of minimum 99%. Chemical dangers. Nitro-p-xylene is easily nitrated to dinitro-p-xylene at a temperature of 80°C. ). [ all data ] Feb 17, 2023 · Large-scale terephthalic acid production from the oxidation of p-xylene is an especially important process in the polyester industry, as it is mainly used in polyethylene terephthalate (PET) manufacturing, a polymer that is widely used in fibers, films, and plastic products. This allows for thin sectioning and staining, facilitating microscopic examination and analysis. The ‘Substance identity’ section is calculated from substance identification information from all ECHA databases. ± 10. synthetic resin, pharmaceutical, chem. Molecular mass: 106. para-Xylene (PX) is a C 8 aromatic compound that is used exclusively as an intermediate feedstock for polyester production via purified terephthalic acid (PTA) or dimethyl terephthalate (DMT). 106-42-3 1. Information on this page: Physical Properties of Xylene. Science. The values were obtained from the CRC (87th edition), or Vogel's Practical Organic Chemistry (5th ed. , 2010). The individual isomers are also available commercially. Critical Constants and Straight-Line Diameters of Ten Hydrocarbons , Bull. Relevant identified uses: For R&D use only. Occurrence/Use. Xylene exists as three different isomers: meta-, ortho-, and para-xylene. 1 Product Identifiers Product name p-Xylene CAS-No. Based on a maximal concentration of 1. 9: Aue, Guidoni, et al. p-Xylene anhydrous, ≥99%; CAS Number: 106-42-3; EC Number: 203-396-5; Synonyms: 1,4-Dimethylbenzene; Linear Formula: C6H4 (CH3)2; find Sigma-Aldrich-296333 MSDS, related peer . The individual isomers of xylene are: ortho-, meta-, and para-xylene. 4 General description. Xylene, an aromatic hydrocarbon is widely used in industry and medical laboratory as a solvent. (1) Mixed xylenes are colorless liquids that are practically insoluble in water and have a sweet odor. PRODUCT AND COMPANY IDENTIFICATION 1. It is flammable and hence applied in the manufacturing of fuel. 47 ppm. p-Xylene is used as a precursor in the production of benzoic, isophthalic, tetraphillic acids and dimethyle esters, which are used in the manufacture of polyester. Exposure controls Occupational exposure controls p-Xylene SDS Safety Data Sheet for p-Xylene 808691. Molecular weight: 106. An antimony or titanium compound is usually employed as a catalyst, a phosphite is added as a stabilizer, and a bluing agent such as cobalt salt is added to mask potential yellowing. Currently, nearly all mixed xylene in minute quantity are added in petroleum for catalytic properties. ChemicalBook Product name : P-XYLENE CBnumber : CB2136488 CAS : 106-42-3 EINECS Number : 203-396-5 Synonyms : p-xylene,para-xylene Relevant identified uses : For R&D use only. It is found in the mixed xylenes stream, which is a mixture of ortho-xylene, metaxylene (MX), and para-xylene (PX). Chemical reactions discussed are migration of the alkyl groups, including 1,2 intramolecular shifts and transalkylation; reactions Aug 30, 2012 · The synthesis relies on the conversion of hexene (from trimerization of ethylene) to 2,4-hexadiene followed by a Diels–Alder reaction with ethylene to form 3,6-dimethylcyclohexene. 7ppm; o-xylene, 0. A xylene with methyl groups at positions 1 and 4. side chains, formula C 6H4(CH3)2. Structural diagrams of the BTX hydrocarbons. Xylene Uses and Industrial Applications. The substance identifiers displayed in the InfoCard are the best available substance name, EC number, CAS number and/or the molecular and structural formulas. Freezing point/melting point. 5 mg/L in drinking water, the maximal daily Notes. , 2000: Experimental literature data re-evaluated by the authors using ab initio protonation entropies; MM 98% of p-xylene production, and half of all xylene, is consumed in this way. 25 mm/0. Jan 1, 2013 · Xylene is an aromatic hydrocarbon m olecule containing a benzene ring with two methyl. Sources/Uses. This precursor is much less expensive than [2. Iso-butene is then synthesized through a dehydration step from iso-butanol. Xylene is also highly volatile and evaporates quickly at room temperature. 8 A) is used as a solvent in the printing, rubber, and leather industries and is one of the top 30 chemicals produced in the United States. 5 Revision Date 06. Xylene, or dimethyl benzene C6H4 (CH3)2 is an organic aromatic hydrocarbon. The compound was first derived from the raw wood spirit. [ all data ] Feb 3, 2014 · Abstract. 848. ] C p,liquid: Constant pressure heat capacity of liquid: S° liquid: Entropy of liquid at standard conditions: T: Temperature: Δ c H° liquid: Enthalpy of combustion of liquid at standard conditions: Δ f H° liquid: Enthalpy of formation of liquid at standard conditions: Δ r G° Free energy of reaction at standard conditions: Δ r H° Enthalpy C p,gas: Constant pressure heat capacity of gas: C p,liquid: Constant pressure heat capacity of liquid: P c: Critical pressure: S° liquid: Entropy of liquid at standard conditions: T: Temperature: T boil: Boiling point: T c: Critical temperature: T fus: Fusion (melting) point: T triple: Triple point temperature: V c: Critical volume: Δ c H Column type Active phase Temperature (C) I Reference Comment; Capillary: HP-1: 0. Solvent for paints, varnishes, inks, dyes, adhesives, pharmaceuticals, detergents, and rubber; production of polymer fiber (mylar and dacron); component of gasoline and fuel oils; component of tobacco smoke (m-,p-) More information about Xylenes (technical mixture of m, o, p-isomers) Other names: p-Xylene, α,α'-dichloro-; α,α'-Dichloro-p-xylene; p-Bis(chloromethyl)benzene; p-Xylene-α,α'-dichloride; p-Xylylene chloride; p-Xylylene dichloride; Benzene, p-bis(chloromethyl)-; Dichlorodi-p-xylylene; 1,4-Bis(chloromethyl)benzene; p-Dichloroxylylene; alpha,alpha'-Dichloro-p-xylene; NSC 36976 Permanent link for this species Nov 23, 2015 · Petrochemical additive such as xylene leads to pulmonitis. Aug 31, 2005 · The mononitration of p-xylene can be easily carried out at 30°C. 17 ppm; and p-xylene, 0. This volatility makes it useful as a solvent in various industries. It undergoes Friedel-Crafts acylation reaction with various acids in the presence of zeolites (catalyst). Details of the supplier of the safety data sheet Apr 11, 2023 · Xylene, also known as Xylol or dimethylbenzene, is an organic compound widely used in the solvent, medical, and technology industries. CH CH O: O: CH CH3 Intermediate Step [2]: CH3 O: :0 O: CH CH3 CH 0% CH, CH3 CH3 Dec 30, 2021 · The prodn. Be sure to answer all parts. Information on this page: There are some differences in the composition of commercial xylenes produced from petroleum and from coal-tar. It is also known as xylol, dimethylbenzene, violet 3, methyl toluene, com p-Xylene. We report here a selective synthesis of para -xylene 1,4-Dimethylbenzene, para-Xylene, p-Xylol Colorless liquid with an aromatic odor. Secondary ChEBI IDs. Liquid xylene is irritating to the skin and eyes, causing local vasodilation by the liberation of histamine and 5-hydroxytryptamine. 25 μm: Capillary: HP-1: 10. Nov 21, 2017 · The xylene isomers p-xylene, o-xylene, and m-xylene are aromatic hydrocarbons comprising with two methyl groups located at different positions on a benzene ring. Laboratory form of xylene constitutes of almost 15 % ethyl benzene, 20 % o-xylene, 44 % m-xylene, and 20 % p-xylene (Kandyala et al. Separation of xylene isomers still prevails to be one of the most important challenges in chemical industry, due to the large amount of commercial use of p-xylene in the production of beverage bottles, fibers and films. Uses advised against Food, drug, pesticide or biocidal product use. Published January 2022. It has an isotopic purity of 98atom%D. 15 K, 1 atm. The mixture originates from catalytic reforming of crude oil, and each individual isomer acts as a valuable intermediate; however, similar physicochemical properties make their separation difficult. CHEBI:25832, CHEBI:45248, CHEBI:10633. It is widely used for the production of ethyl benzene, polyester, and plastic, and also acts as a solvent in paints or varnishes. phthalic anhydride (PA) from o-xylene, isophthalic acid from m-xylene and terephthalic acid from p-xylene. It is a flammable liquid that requires utmost care during its usage. p -Xylene developments in the past 10 years include a method for producing Simon, M. ortho-Xylene (1,2-dimethyl-benzene, o-xylene, or OX) is an aromatic compound that is commonly derived from crude oil sources. These different forms are referred to as isomers. This monoene is readily dehydrogenated to para -xylene uncontaminated by the ortho and meta isomers. Some substance identifiers may have been claimed m-Xylene has an airborne odor threshold of 3. 3 Details of the supplier of the … o-xylene, isophthalic acid from m-xylene and terephthalic acid from p-xylene. Relative density (water = 1): 0. The sources of exposure and health effects resulting from exposure are consistent for all three forms. This review presents and discusses catalytic advances and new trends in terephthalic acid production (since 2014 Jun 14, 2013 · Use of NH4OAc and BMIM Br in Staged Oxidation of p-Xylene and Oxidative Treatment of CTA for Obtaining TPA with a Low Content of 4-CBA. A series of solutions of p -xylene dissolved in the first 12 members of the 4- n -alkyloxy-4′-cyanobiphenyls (NOCB) were prepared. CAS Registry Number: 106-42-3. The methoxy group H 3 CO − is the leaving group; while it condenses in the deposition chamber, it does not interfere with the deposition of the polymer. The name comes from the Greek word ‘Xylon Which indicates wood. Solvent applications. Melting point: 13°C. Quantity Value Units Method Reference Comment; T boil: 411. Solubilities are in water and are reported as grams solvent/100 grams water. Chim. This article reviews the properties, commercial manufacturing aspects, and uses of the three xylene isomers, ie, o -xylene, m -xylene, and p -xylene, and the ethylbenzene present in mixed xylene streams. (1) The odor threshold for m-xylene is 1. 2]para-cyclophane. , Methods and Apparatus Used at the Bureau of Physicochemical Standards XV. to Safe Work Australia - Code of Practice p-Xylene ≥99 %, for synthesis article number: 8817 Australia (en) Page 5 / 16 Quantity Value Units Method Reference Comment; Δ r H°: 1598. It has a relatively high boiling point of around 138-144°C and a low freezing point of -47°C. Information on this page: Other names: Benzene, 1,4-dimethyl-; p-Dimethylbenzene; p-Xylol; 1,4-Dimethylbenzene; 1,4-Xylene; p-Methyltoluene; para-Xylene; Chromar; Scintillar; 4-Methyltoluene; NSC 72419; UN 1307; 1,4-dimethyl-benzene ( p-xylene) Permanent link for this species. Xylene is a colorless, sweet-smelling liquid that is slightly less dense than water. Use this link for bookmarking this species for future reference. S. Not for medicinal, household or other use. [ all data ] IUPAC Standard InChIKey: URLKBWYHVLBVBO-UHFFFAOYSA-N Copy CAS Registry Number: 106-42-3 Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file; Gas phase thermochemistry data Jul 13, 2017 · Polymerized p-xylene is an industrially important polymer, which is primarily used as a basic raw material in the manufacturing of terephthalic acid (TPA), purified terephthalic acid (PTA), and p-Xylene 95682-2. Copy Sheet of paper on top of another sheet. 3–8. , 2005: 30. It is one of the three isomers of dimethylbenzene known collectively as xylenes. Chemical Economics Handbook. Definition. m/0. [ all data ] As a result of flow, agitation, etc. Stars. In the U. Product Name p-Xylene Cat No. Other names: Benzene, 1,4-dimethyl-; p-Dimethylbenzene; p-Xylol; 1,4-Dimethylbenzene; 1,4-Xylene; p-Methyltoluene; para-Xylene; Chromar; Scintillar; 4-Methyltoluene; NSC 72419; UN 1307; 1,4-dimethyl-benzene ( p-xylene) Permanent link for this species. It’s also effective at removing greasy stains, resins, enamels, and glue. As a paint thinner, this chemical has some advantages over other paint thinning agents like toluene. Sep 13, 2023 · As of 2022, ethylene glycol is made from natural gas, and terephthalic acid comes from p-xylene created from crude oil. ChEBI ASCII Name. In the petroleum refining and petrochemical industries, the initialism BTX refers to mixtures of benzene, toluene, and the three xylene isomers, all of which are aromatic hydrocarbons. IUPAC Standard InChIKey: URLKBWYHVLBVBO-UHFFFAOYSA-N. This entity has been manually annotated by the ChEBI Team. Feb 17, 2023 · Large-scale terephthalic acid production from the oxidation of p -xylene is an especially important process in the polyester industry, as it is mainly used in polyethylene terephthalate (PET) manufacturing, a polymer that is widely used in fibers, films, and plastic products. Their unique thermodynamic and kinetic behavior permits them to achieve rapid degradation of p-xylene at low temperatures (<15 °C). It acts as an intermediate in plastic and rubber products. Company Xylenes is a collective term for a mixture of m-, o-, and p- isomers of xylene. Direct xylene eye splash causes initial transient discomfort and hyperemia of the conjunctiva. The trinitro-p-xylene can be obtained at 120°C. Brian J. Go To: Top, Infrared Spectrum, References Data from NIST Standard Reference Database 69: NIST Chemistry WebBook The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. Chemical structure: AU xylene, mixture of isomers 106-42-3 WES 80 350 150 655 WES Notation Ceiling-C Ceiling value is a limit value above which exposure should not occur Safety data sheet Safety data sheet acc. After a dimerization step from iso-butene into iso-octene, p-xylene is obtained via a catalytic m-, o-, and p-Xylene are the three isomers of xylene; commercial or mixed xylene usually contains about 40-65% m-xylene and up to 20% each of o- and p-xylene and ethylbenzene. 17. p -Xylene-d 10 is a deuterated derivative of p -xylene. Paint Technol. Information on this page: Enthalpy of vaporization at standard conditions (nominally 298. Xylene is marketed principally as a mixture of ortho, meta and para isomers, generally referred to as ‘mixed xylenes’. While very similar in structure, these three isomers have very different Simon, M. 86. Xylene is used as a solvent. 5L Version 1. Whereas benzene and toluene serve as the raw materials for a wide range of products, applications for the three xylene isomers, o-, m- and p-xylene, are basically limited to chemicals arising through oxidation, i. Using :0-N= O: as the electrophile, write a reasonable mechanism for the nitration of 1,4-dimethylbenzene (p-xylene). Soc. Information on this page: There are three forms of xylene in which the methyl groups vary on the benzene ring: meta-xylene, ortho-xylene, and para-xylene (m-, o-, and p-xylene). 2 Relevant identified uses of the substance or mixture and uses advised against Identified uses : Laboratory chemicals, Synthesis of substances 1. Hudak and Ungvary (1978) evaluated the embryotoxic effects of xylene (a mixture of 10% o-xylene, 50% m-xylene, 20% p-xylene, and 20% ethylbenzene) at 230 ppm (1 g/m 3) given by inhalation to rats for 24 h/d on days 1-21 of pregnancy Production of p-xylene from biomass has been reported. This review presents and discusses catalytic advances and new trends CHEBI:27417. Notes: In 2005, this table was adapted by Dr. (4) Jan 24, 2024 · Xylene is commonly used in tissue processing during histology and pathology studies. : AC445680000, AC445680010, AC445680025, AC445681000 CAS No 106-42-3 Synonyms 1,4-Dimethylbenzene Recommended Use Laboratory chemicals. [1] It can be obtained from the mixtures of isomeric forms of xylene and ethylbenzene, isolated from the naptha fraction of petroleum. It readily evaporates and can form explosive mixtures with air. Gas basicity (review) (kJ/mol) Reference Comment; 766. Single crystals of 2,3-dinitro-p-xylene and 2,3,5-trinitro-p-xylene were grown using the slow cooling method and we report the X-ray structure of the P271 Use only outdoors or in a well-ventilated area. 2024 Page 9 / 18 p-xylene Marine sediment: 0,252 mg/kg dw p-xylene Sewage treatment plant: 1,6 mg/l Assessment factor: 10 p-xylene Soil: 0,852 mg/kg dw Assessment factor: 50 8. [7] [8] o-Xylene is an important precursor to phthalic anhydride. Environmental Protection Agency | US EPA P-Xylene | C6H4(CH3)2 or C8H10 | CID 7809 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. Technical and commercial grades of xylenes often contain substantial amounts of ethylbenzene (10 50%), and perhaps minor amounts of other solvents as well. The general composition of xylenes from petroleum is 44% m-xylene, 20% o-xylene, 20% p-xylene and 15% ethylbenzene. p-xylene. Notes.
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