| 词条 | O-Xylene |
| 释义 |
| Watchedfields = changed | verifiedrevid = 462263866 | Name = o-Xylene | ImageFileL1 = Ortho-Xylol - ortho-xylene 2.svg | ImageNameL1 = Skeletal formula | ImageFileR1 = o-xylene-spaceFill.png | ImageSizeR1 = 150px | ImageNameR1 = Space-filling model | PIN = 1,2-Xylene | SystematicName = 1,2-Dimethylbenzene | OtherNames = ortho-Xylene |Section1={{Chembox Identifiers | DrugBank_Ref = {{drugbankcite|correct|drugbank}} | DrugBank = DB03029 | UNII_Ref = {{fdacite|correct|FDA}} | UNII = Z2474E14QP | ChEBI_Ref = {{ebicite|correct|EBI}} | ChEBI = 28063 | SMILES = CC1=C(C)C=CC=C1 | CASNo = 95-47-6 | KEGG_Ref = {{keggcite|correct|kegg}} | KEGG = C07212 | CASNo_Ref = {{cascite|correct|CAS}} | RTECS = ZE2450000 | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} | ChEMBL_Ref = {{ebicite|correct|EBI}} | ChEMBL = 45005 | ChemSpiderID = 6967 | StdInChI_Ref = {{stdinchicite|correct|chemspider}} | StdInChI = 1S/C8H10/c1-7-5-3-4-6-8(7)2/h3-6H,1-2H3 | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} | StdInChIKey = CTQNGGLPUBDAKN-UHFFFAOYSA-N | InChI = 1/C8H10/c1-7-5-3-4-6-8(7)2/h3-6H,1-2H3 | InChIKey = CTQNGGLPUBDAKN-UHFFFAOYAE |Section2={{Chembox Properties | C=8 | H=10 | Appearance = Colorless liquid | Density = 0.88 g/ml | MeltingPtC = -24 | BoilingPtC = 144.4 | Solubility = 0.02% (20°C)[1] | Solubility1 = very soluble | Solvent1 = ethanol | Solubility2 = very soluble | Solvent2 = diethyl ether | RefractIndex = 1.50545 | Viscosity = 1.1049 cP at 0 °C 0.8102 cP at 20 °C | VaporPressure = 7 mmHg (20°C)[1] | MagSus = -77.78·10−6 cm3/mol |Section3={{Chembox Structure | Dipole = 0.64 D [1] |Section7={{Chembox Hazards | ExternalSDS = External MSDS | EUClass = Harmful (Xn) Flammable (F) | FlashPtC = 32 | NFPA-H = 2 | NFPA-F = 3 | NFPA-R = 0 | NFPA-S = | RPhrases = {{R11}} {{R20}} {{R21}} {{R38}} | SPhrases = {{S25}} | PEL = TWA 100 ppm (435 mg/m3)[2] | ExploLimits = 0.9%-6.7%[2] | IDLH = 900 ppm[2] | REL = TWA 100 ppm (435 mg/m3) ST 150 ppm (655 mg/m3)[2] | TLV-TWA = 100 ppm[3] | TLV-STEL = 150 ppm[3] | AutoignitionPtC = 463 | AutoignitionPt_ref = [3] | LCLo = 6125 ppm (rat, 12 hr) 6125 ppm (human, 12 hr)[4] |Section8={{Chembox Related | OtherFunction_label = aromatic hydrocarbons | OtherFunction = m-xylene p-xylene toluene }}o-Xylene (ortho-xylene) is an aromatic hydrocarbon with the formula C6H4(CH3)2. with two methyl substituents bonded to adjacent carbon atoms of a benzene ring (the ortho configuration). It is a constitutional isomer of m-xylene and p-xylene, the mixture being called xylene or xylenes. o-Xylene is a colorless slightly oily flammable liquid.[5] Production and usePetroleum contains about one weight percent xylenes. Most o-xylene is produced by cracking petroleum, which affords a distribution of aromatic compounds, including xylene isomers. m-Xylene is isomerized to o-xylene. Net production was approximately 500,000 tons in the year 2000. o-Xylene is largely used in the production of phthalic anhydride, which is a precursor to many materials, drugs, and other chemicals.[5]Toxicity and exposureXylenes are not acutely toxic, for example the {{LD50}} (rat, oral) is 4300 mg/kg. Effects vary with animal and xylene isomer. Concerns with xylenes focus on narcotic effects.[5] References1. ^{{Cite journal | doi = 10.1016/0022-2852(73)90016-7 | title = Microwave spectrum, barrier for methyl rotation, methyl conformation, and dipole moment of ortho-xylene | year = 1973 | last1 = Rudolph | first1 = H.D. | last2 = Walzer | first2 = K. | last3 = Krutzik | first3 = Irmhild | journal = Journal of Molecular Spectroscopy | volume = 47 | issue = 2 | pages = 314}} {{DEFAULTSORT:Xylene, o-}}2. ^1 2 3 4 5 {{PGCH|0668}} 3. ^1 2 {{cite web |url = https://www.cdc.gov/niosh/ipcsneng/neng0084.html |work = International Chemical Safety Cards |publisher = ICSC/NIOSH | title = o-Xylene |date = July 1, 2014}} 4. ^{{IDLH|95476|Xylene (o-, m-, p-isomers)}} 5. ^1 2 {{cite encyclopedia|author1=Fabri, Jörg; |author2=Graeser, Ulrich|author3= Simo, Thomas A.|title=Xylenes]|encyclopedia=Ullmann's Encyclopedia of Industrial Chemistry|year=2000|publisher=Wiley-VCH|place= Weinheim|doi=10.1002/14356007.a28_433}} 1 : Alkylbenzenes |
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