Chaw Tsim Khoom Zoo Nqe N, N-DIMETHYLFORMAMIDE (DMF) CAS 68-12-2
piav qhia
Lub npe los ntawm qhov tseeb tias nws yog dimethyl hloov ntawm formamide (amide ntawm formic acid), thiab ob pawg methyl nyob rau ntawm N (nitrogen) atom. N,N-DIMETHYLFORMAMID yog cov kuab tshuaj polar (hydrophilic) aprotic uas kub heev, thiab Chemicalbook tuaj yeem txhawb nqa SN2 cov tshuaj tiv thaiv. N,N-DIMETHYLFORMAMID yog tsim los ntawm kev siv formic acid thiab dimethylamine. N,N-DIMETHYLFORMAMID tsis ruaj khov (tshwj xeeb tshaj yog thaum kub siab) nyob rau hauv qhov muaj cov hauv paus muaj zog xws li sodium hydroxide lossis cov kua qaub muaj zog xws li hydrochloric acid lossis sulfuric acid, thiab hydrolyzes rau formic acid thiab dimethylamine. Nws ruaj khov heev hauv huab cua thiab thaum cua sov rau npau. Thaum qhov kub siab dua 350 ℃, nws yuav poob dej thiab tsim cov pa roj carbon monoxide thiab dimethylamine. N,N-DIMETHYLFORMAID yog ib qho tshuaj aprotic polar zoo, uas tuaj yeem yaj feem ntau cov organic thiab inorganic tshuaj, thiab sib xyaw nrog dej, cawv, ethers, aldehydes, ketones, esters, halogenated hydrocarbons thiab aromatic hydrocarbons, thiab lwm yam. Qhov kawg ntawm N,N-DIMETHYLFORMAID molecule yog nyob ib puag ncig los ntawm methyl pawg, tsim ib qho steric hindrance, yog li cov ions tsis zoo tsis tuaj yeem mus txog, tab sis tsuas yog cov ions zoo xwb. Cov anion liab qab yog qhov ua haujlwm ntau dua li cov anion solvated. Ntau cov tshuaj ionic yooj yim dua hauv N,N-DIMETHYLFORMAID dua li cov tshuaj protic dav dav, piv txwv li, cov tshuaj ntawm carboxylates nrog halogenated hydrocarbons hauv N,N-DIMETHYLFORMAID ntawm chav tsev kub, tuaj yeem tsim cov esters siab, tshwj xeeb tshaj yog tsim rau kev tsim cov esters hindered sterically.
Synthesis. Cov lus txhais
amide, n, n-dimethyl-formicaci; Dimethylamidkyselinymravenci; dimethylamidkyselinymravenci; N, N-DIMETHYLFORMAMID, 99.9+%, HPLCRADE; NN-DIMETHYLFORChemicalbookMAMIDE99.8% ACS&;N,N-DIMETHYLFORMAMIDE,4X25ML; N,N-DIMETHYLFORMAMIDE,MOLECULARBIOLOGYREAGENT; N,N-DIMETHYLFORMAMIDENEUTRALMARKER*FORCAPILLARY
Cov ntawv thov ntawm DMF
DMF yog ib qho tshuaj yaj zoo rau ntau yam polymers siab xws li polyethylene, polyvinyl chloride, polyacrylonitrile, polyamide, thiab lwm yam, thiab siv tau rau kev sib xyaw ntub ntawm cov fibers hluavtaws xws li polyacrylonitrile fibers, thiab kev tsim cov polyurethane; Nws yog siv rau kev ua yas zaj duab xis; nws kuj tseem siv tau ua cov xim stripper rau kev tshem tawm xim; nws kuj tseem tuaj yeem yaj qee cov pigments uas tsis muaj zog, yog li cov pigments muaj cov yam ntxwv ntawm cov xim. DMF yog siv rau kev rho tawm aromatic thiab kev sib cais thiab rov qab los ntawm butadiene los ntawm C4 feem thiab isoprene los ntawm C5 feem, thiab kuj tseem siv tau ua ib qho reagent zoo rau kev sib cais ntawm cov khoom tsis yog hydrocarbon los ntawm paraffin. Nws muaj kev xaiv zoo rau kev yaj ntawm isophthalic acid thiab terephthalic acid: isophthalic acid yaj ntau dua hauv DMF dua li terephthalic acid, kev rho tawm cov kuab tshuaj lossis ib feem Crystallization, ob qho tuaj yeem sib cais. Hauv kev lag luam petrochemical, DMF tuaj yeem siv ua cov roj nqus kom sib cais thiab ua kom cov pa roj zoo. Ua tus neeg sawv cev kho rau kev ntxuav Chemicalbook hauv kev lag luam polyurethane, nws feem ntau yog siv rau hauv kev tsim cov tawv hluavtaws ntub; ua cov kuab tshuaj hauv kev lag luam acrylic fiber, nws feem ntau yog siv rau hauv kev tsim cov acrylic fiber qhuav; hauv kev lag luam hluav taws xob ua cov quenching ntawm cov khoom tin-plated thiab cov laug cam Circuit Court Lwm cov lag luam suav nrog cov neeg nqa cov pa roj txaus ntshai, cov kuab tshuaj rau cov tshuaj crystallization, cov nplaum, thiab lwm yam. Hauv cov tshuaj tiv thaiv organic, DMF tsis yog tsuas yog siv dav ua cov kuab tshuaj rau cov tshuaj tiv thaiv, tab sis kuj yog ib qho tseem ceeb hauv kev tsim cov organic. Hauv kev lag luam tshuaj tua kab, nws tuaj yeem siv los tsim ciprofloxacin; hauv kev lag luam tshuaj, nws tuaj yeem siv los tsim cov iodine, doxycycline, cortisone, vitamin B6, iodine, quercetin, pyrantel, N-formylsarcomin, Oncoline, methoxyfen, benzodiazepine, cyclohexyl nitrosourea, furoflurouracil, hemostatic acid, bepartame, megestrol, bilevita, chlorpheniramine, sulfonamides Ntau lawm. DMF muaj cov nyhuv catalytic hauv cov tshuaj tiv thaiv ntawm hydrogenation, dehydrogenation, dehydration thiab dehydrohalogenation, yog li ntawd qhov kub ntawm cov tshuaj tiv thaiv qis dua thiab cov khoom purity zoo dua.
1. Nws yog ib qho tshuaj organic zoo heev, siv ua cov tshuaj rau polyurethane, polyacrylonitrile, thiab polyvinyl chloride, thiab kuj siv ua cov tshuaj extractant, ua cov khoom siv raw rau tshuaj thiab tshuaj tua kab.
2. Siv ua cov tshuaj reagent thiab cov kuab tshuaj rau cov yas resin thiab acetylene
3. Nws tsis yog tsuas yog cov khoom siv tshuaj lom neeg uas muaj ntau yam kev siv xwb, tab sis kuj yog cov kuab tshuaj zoo heev uas muaj ntau yam kev siv. DMF yog cov kuab tshuaj zoo rau ntau yam polymers siab xws li polyethylene, polyvinyl chloride, polyacrylonitrile, polyamide, thiab lwm yam, thiab siv tau rau kev sib xyaw ntub ntawm cov fibers hluavtaws xws li polyacrylonitrile fibers, thiab kev tsim cov polyurethane; Nws yog siv rau kev ua yas zaj duab xis; nws kuj tseem siv tau ua cov xim pleev xim rau kev tshem tawm cov xim; nws kuj tseem tuaj yeem yaj qee cov xim tsis muaj zog, yog li cov xim muaj cov yam ntxwv ntawm cov xim. DMF yog siv rau kev rho tawm aromatic thiab kev sib cais thiab rov qab los ntawm butadiene los ntawm C4 feem thiab isoprene los ntawm C5 feem, thiab kuj tseem siv tau ua cov tshuaj reagent zoo rau kev sib cais cov khoom tsis yog hydrocarbon los ntawm paraffin. Nws muaj kev xaiv zoo rau qhov solubility ntawm isophthalic acid thiab terephthalic acid: isophthalic acid yaj tau ntau dua hauv DMF dua li terephthalic acid, cov kuab tshuaj rho tawm yog ua tiav hauv dimethyl chemicalbook acid formamide Los yog ib feem crystallized, ob qho tuaj yeem sib cais. Hauv kev lag luam petrochemical, DMF tuaj yeem siv ua cov roj nqus kom sib cais thiab ua kom cov pa roj zoo. Hauv cov tshuaj tiv thaiv organic, DMF tsis yog tsuas yog siv dav ua cov kuab tshuaj rau cov tshuaj tiv thaiv, tab sis kuj yog ib qho tseem ceeb hauv kev sib xyaw ua ke hauv cov organic. Hauv kev lag luam tshuaj tua kab, nws tuaj yeem siv los tsim ciprofloxacin; Hauv kev lag luam tshuaj, nws tuaj yeem siv los ua cov tshuaj iodine, doxycycline, cortisone, vitamin B6, iodine, quercetin, pyrantel, N-formylsarcomin, Tumorine, Methoxyfen mustard, Bian nitrogen mustard, cyclohexyl nitrosourea, furoflurouracil, hemostatic acid, bepartame, megestrol, bilevitamin, chlorpheniramine, thiab lwm yam. DMF muaj cov nyhuv catalytic hauv cov tshuaj tiv thaiv ntawm hydrogenation, dehydrogenation, dehydration thiab dehydrohalogenation, yog li qhov kub ntawm cov tshuaj tiv thaiv qis dua thiab cov khoom purity zoo dua.
4. Cov tshuaj titration uas tsis yog dej. Cov tshuaj rau vinyl thiab acetylene. Kev txiav txim siab photometric. Cov tshuaj chromatographic roj ruaj khov (qhov kub ua haujlwm siab tshaj plaws 50 ℃, cov tshuaj yog methanol), kev sib cais Chemicalbook kev tshuaj xyuas C2 ~ C5 hydrocarbons, thiab tuaj yeem sib cais cov khoom ib txwm, isobutene thiab cis, trans-2-butene. Kev tshuaj xyuas cov tshuaj tua kab. Organic Synthesis. Peptide synthesis. Rau kev lag luam thaij duab.
Cov Lus Qhia Txog DMF
| Cov tshuaj sib xyaw | Cov Lus Qhia Tshwj Xeeb |
| Qhov tsos | meej |
| Dav Dav | ≥99.9% |
| Methanol | ≤0.001% |
| Xim (PT-CO), Hazen | ≤5 |
| Dej,% | ≤0.05% |
| Hlau, mg/kg | ≤0.05 |
| Acidity (HCOOH) | ≤0.001% |
| Qhov yooj yim (DMA) | ≤0.001% |
| PH (25 ℃, 20% dej) | 6.5-8.0 |
| Kev coj ua (25 ℃, 20% aqueous), μs / cm | ≤2 |
Kev ntim khoom ntawm DMF
190kg/nruas
Kev khaws cia yuav tsum nyob rau qhov txias, qhuav thiab muaj cua nkag.
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