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Le préfixe o- (xylène), p- ou m- indique à quels atomes de carbone du noyau aromatique sont fixés les groupements méthyle. En numérotant les atomes de carbone à partir d''un atome lié à un groupement méthyle, le composé est du o-xylène (1,2-diméthylbenzène) si l''atome de carbone adjacent, numéroté 2, est également lié à un groupement méthyle.
Ogata M, Tomokuni K, Takatsuka Y. Urinary excretion of hippuric acid and m- or p-methylhippuric acid in the urine of persons exposed to vapours of toluene and m- or p- xylene as a test of exposure. Br J Ind Med. 1970; 27:43–50. [PMC free article] [] []
19/11/2022· m-Xylene - Nature colorless transparent liquid with strong aromatic odor. Relative density 0.8684, (d20) 0.642. Melting Point -872 °c. Boiling point 139.1 °c. Refractive index 4972, (,z) 4971. Flash point 29. 44 °c. Spontaneous ignition point was 527. 78 ℃. Insoluble in water, soluble in ethanol and ether. Last Update:2022-01-01 10:39:13
About p-Xylene Formula: C 8 H 10 Molecular weight: 106.1650 IUPAC Standard InChI: InChI=1S/C8H10/c1-7-3-5-8 (2)6-4-7/h3-6H,1-2H3 IUPAC Standard InChIKey: URLKBWYHVLBVBO-UHFFFAOYSA-N CAS Registry Nuer: 106-42-3 Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file
, ( :Xylene, Dimethylbenzene, : ξύλο ,,“”), , C 8 H 10 。 ,。 C 8 H 10 ,C 6 H 4 (CH 3 ) 2 。 ,。 0.5-1%, …
Abstract CONSIDERABLE interest has recently been centred on the difficult separation of m -xylene and p -xylene by gas chromatography both from the point of view of the analysis of mixtures
m,p-Xylene Substance Details Internal Tracking Nuer: 17295783 Substance Type: Chemical Substance Systematic Name: Benzene, 1,3 (or 1,4)-dimethyl- CAS Nuer: 179601-23-1 EPA Registry Name: m,p-Xylene Molecular Weight: 106.16 …
m-,p-,o-Xylene - Physico-chemical Properties Molecular Formula C32H40 Molar Mass 424.66 Melting Point -34℃ Boling Point 547.7°C at 760 mmHg Flash Point 289.7°C Solubility 0.1 g/L (20℃) Vapor Presure 1.71E-11mmHg at 25°C Physical and Chemical Properties The trait was a mixture of P-xylene, O-xylene, M-xylene and ethylbenzene.
Xylene (o-, m-, p-isomers) May 1994 Immediately Dangerous to Life or Health Concentrations (IDLH) CAS nuers: 95-47-6 (o-isomer), 108-38-3 (m-isomer), 106-42-3 (p-isomer) NIOSH REL: 100 ppm (435 mg/m3) TWA, 150 ppm (655 mg/m3) STEL Current OSHA PEL: 100 ppm (435 mg/m3) TWA 1989 OSHA PEL: 100 ppm (435 mg/m3) TWA, 150 ppm (655 mg/m3) STEL
Peltier-driven copper posts, which could be sub-cooled relative to the bulk liquid mixture, controlled the loion of the solid formed within each cell. For the methane+ p- xylene system both VLE and SLVE data sets were measured and used separately to tune the binary interaction parameter (BIP) within the Peng Robinson equation of state.
25/6/2019· :m-,meta-:p-,para- 2019-06-27 11:32 10 。 ortho 1,2- meta 1,3- para 1,4-Want to know more
On average, the odor threshold appears to be about 1.0ppm. m- Xylene has an airborne odor threshold of 3.7ppm; o- xylene, 0.17 ppm; and p- xylene, 0.47 ppm. Liquid xylene is irritating to the skin and eyes, causing local vasodilation by the liberation of histamine and 5-hydroxytryptamine.
40-65% m-xylene and up to 20% each of o- and p-xylene and ethylbenzene. (1) Mixed xylenes are colorless liquids that are practically insoluble in water and have a sweet odor. (1) The odor threshold for m-xylene is 1.1 ppm. (4) The chemical formula for mixed 8
23/1/2022· m,p-ethylphenethyltrimethoxysilane. 259818-29-6. m-xylene, 2-iodo-. 608-28-6. Chemsrc provides m,p-Xylene (CAS#:179601-23-1) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Articles of m,p-Xylene are included as well. >> amp version: m,p-Xylene.
Abstract CONSIDERABLE interest has recently been centred on the difficult separation of m -xylene and p -xylene by gas chromatography both from the point of view of the analysis of mixtures
p-Xylene clathrate crystal of ^9-type was precipitated in (4-methylpyridine 10 vol % -fmethyl cellosolve 90 vol %) solution containing various amounts of /j-xylene and constant amount of Ni- complex.
Find m p xylenes and related products for scientific research at MilliporeSigma Products US EN Products Appliions Products Services Support Advanced Search Structure Search Search Within Products
Published March 1998. A significant amount of new xylene isomer capacity is being built worldwide, especially for p-xylene, which has experienced sustained demand growth of 7-8% per year. While p-xylene production economics were extremely attractive in 1994-1995, there is now concern about surplus capacity and reduced profitability.
Ogata M, Tomokuni K, Takatsuka Y. Urinary excretion of hippuric acid and m- or p-methylhippuric acid in the urine of persons exposed to vapours of toluene and m- or p- xylene as a test of exposure. Br J Ind Med. 1970; 27:43–50. [PMC free article] [] []
Peltier-driven copper posts, which could be sub-cooled relative to the bulk liquid mixture, controlled the loion of the solid formed within each cell. For the methane+ p- xylene system both VLE and SLVE data sets were measured and used separately to tune the binary interaction parameter (BIP) within the Peng Robinson equation of state.
The physical properties of the isomers of xylene differ slightly. The melting point ranges from −47.87 °C (−54.17 °F) ( m -xylene) to 13.26 °C (55.87 °F) ( p -xylene)—as usual, the para isomer''s melting point is much higher because it packs more readily in the crystal structure. The boiling point for each isomer is around 140 °C (284 °F).
m,p-xylene " within Products Sort by Relevance All Photos ( 1) Boron trichloride solution Empirical Formula (Hill Notation): BCl3 CAS No.: 10294-34-5 Molecular Weight: 117.17 Match Criteria: Product Name All Photos ( 1) 2,4-Dimethylaniline Synonym (s): 1-Amino-2,4-dimethylbenzene, 2,4-Xylidine, 4-Amino-m-xylene Linear Formula: (CH3)2C6H3NH2
Find m p xylenes and related products for scientific research at MilliporeSigma Products US EN Products Appliions Products Services Support Advanced Search Structure Search Search Within Products
Le préfixe o- (xylène), p- ou m- indique à quels atomes de carbone du noyau aromatique sont fixés les groupements méthyle. En numérotant les atomes de carbone à partir d''un atome lié à un groupement méthyle, le composé est du o-xylène (1,2-diméthylbenzène) si l''atome de carbone adjacent, numéroté 2, est également lié à un groupement méthyle.
The LEL criteria were 10% with a magnitude of 1100 ppm for a maximum distance of 54 m and 35 m for P-xylene and O-xylene, respectively. The maximum distance of 20 m for O-xylene based on
1%()。 [7] , 。 。 2,4-2,6- ,。 [8] [6] 。 [ ] LD50 (,) 4300 mg/kg, …
、、 。 , ,。 ,。 。 Xylene mixture (m-xylene, o-xylene, p-xylene) CAS 1330-20-7 0.86 1 2 …
(Paraxylene),,C 8 H 10 ,,,,、、,、、,,。 [2] para-xylene P-Xylene(PX) 1,4-dimethyl-benzene …
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