N, N-Dimethylformamide CAS 68-12-2
Khoom taw qhia
Dimethylformamide yog hu ua DMF. Nws yog ib qho sib xyaw ua ke uas cov pab pawg hydroxyl ntawm formic acid hloov los ntawm ib pawg dimethylamino, nrog rau cov mis molecular HCON (CH3) 2. Nws yog xim tsis muaj xim thiab pob tshab ua kua ua kua nrog lub teeb amine tsw thiab qhov txheeb ze ntawm 0.9445 (25 ℃). Melting point -61 ℃. Kub taw tes 152.8 ℃. Flash point 57.78 ℃. Vapor ceev 2.51. Vapor siab 0.49kpa (3.7mmHg25 ℃). Autoignition point yog 445 ℃. Qhov tawg txwv ntawm chav thiab huab cua sib tov yog 2.2 ~ 15.2%. Kev qhib nplaim taws thiab kub kub yuav ua rau combustion thiab tawg. Nws tuaj yeem hnov mob hnyav nrog cov concentrated sulfuric acid thiab fuming nitric acid thiab txawm tawg. Nws yog miscible nrog dej thiab feem ntau cov organic solvents Chemicalbook. Nws yog ib qho hnyav rau cov tshuaj tiv thaiv. Ntshiab dimethylformamide tsis muaj ntxhiab, tab sis qib kev lag luam lossis cov khoom tsis zoo dimethylformamide muaj cov ntxhiab tsw ntxhiab vim nws muaj dimethylamine impurities. 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. Dimethylformamide yog polar (hydrophilic) aprotic hnyav nrog lub siab kub, uas tuaj yeem txhawb nqa SN2 cov tshuaj tiv thaiv. Dimethylformamide yog tsim los ntawm formic acid thiab dimethylamine. Dimethylformamide tsis ruaj khov (tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias) nyob rau hauv lub xub ntiag ntawm lub hauv paus muaj zog xws li sodium hydroxide los yog muaj zog acids xws li hydrochloric acid los yog sulfuric acid, thiab hydrolyzes rau formic acid thiab dimethylamine.
Nws yog ruaj khov heev nyob rau hauv cov huab cua thiab thaum rhuab mus boiling. Thaum qhov kub siab tshaj 350 ° C, nws poob dej thiab tsim carbon monoxide thiab dimethylamine. N, N-dimethylformamide yog ib qho zoo heev aprotic polar solvent uas tuaj yeem yaj feem ntau cov organic thiab inorganic tshuaj thiab miscible nrog dej, cawv, ethers, aldehydes, ketones, esters, halogenated hydrocarbons thiab aromatic hydrocarbons. . Qhov txiaj ntsig zoo kawg ntawm N, N-dimethylformamide molecule yog nyob ib puag ncig los ntawm methyl pawg, tsim ib qho kev tiv thaiv kab mob uas tiv thaiv cov ions tsis zoo los ntawm kev mus txog thiab tsuas yog koom nrog cov ions zoo. Cov anions liab qab muaj zog ntau dua li kev daws cov anions. Ntau cov tshuaj tiv thaiv ionic yooj yim dua rau hauv N, N-dimethylformamide dua li cov kuab tshuaj protic. Piv txwv li, carboxylates thiab halogenated hydrocarbons teb nyob rau hauv N, N-dimethylformamide ntawm chav tsev kub. , tuaj yeem tsim cov esters nrog cov txiaj ntsig siab, thiab tshwj xeeb tshaj yog tsim nyog rau kev sib txuas ntawm sterically hindered esters.
Daim ntawv thov teb
Dimethylformamide yog cov kua tsis muaj xim thiab pob tshab. Nws tsis yog tsuas yog siv dav siv tshuaj raw khoom, tab sis kuj yog ib qho hnyav hnyav nrog ntau yam kev siv. Dimethylformamide yog ib qho tseem ceeb raw khoom hauv kev lag luam tshuaj, petrochemical, tawv thiab lwm yam lag luam.
Kev piav qhia kev tsim kho
N, N-Dimethylformamide
CAS 68-12-2 Nr
CBN No.: CB2854115
Cov mis mos molecular: C3H7NO
Molecular hnyav 73.09
Melting point: -61 ° C (lit.)
Kev sib hloov tshwj xeeb: 0.94º
Kub taw tes: 153 ° C (lit.)
Ceev: 0.944g / mL (lit.) V
apor Chemicalbook Vapor ceev: 2.5 (vsair)
Vapor siab: 2.7mmHg (20 ° C) Refractive index: n20 / D1.430 (lit.)
Flash point: 136 °
Kev khaws cia thiab kev thauj mus los
Packing: Raws li cov neeg siv khoom xav tau
Cia: Khaws rau hauv qhov chaw qhuav, tsaus thiab qhov cua.
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Peb siv cov txheej txheem ntau lawm thiab cov txheej txheem xeem kom paub ntau lawm, kev tswj kom tau raws li tus qauv. Peb tau pom zoo los ntawm SGS, ISO9001, ISO140 01, GB / HS16949 thiab T28001.
Mit-Ivy cov khoom tseem ceeb suav nrog hauv qab no:
API, tshuaj intermediates, Dye intermediates, nplua, tshuaj tshwj xeeb, dej muaj xim thiab cov khoom siv hluav taws xob tshiab.
Peb lub khw tseem ceeb suav nrog Asmeskas, Is Nrias teb, Africa, Indonesia, Qaib ntxhw, South-East Asia, West Asia thiab lwm yam. MIT-IVY Kev Lag Luam Cov khoom tseem ceeb sib koom 97% ntawm kev lag luam hauv tsev tshwj xeeb hauv kev tsim khoom thiab kev tswj hwm, Peb tuaj yeem muab cov khoom lag luam nrog cov nqi sib tw. nrog hwm zoo thiab tus nqi thiab txais tos los tham. Peb lub tuam txhab muaj cov kws tshaj lij uas loj hauv tshuaj R & D thiab kev tswj xyuas sicentific, muab cov khoom siv tshuaj zoo nrog cov kev pabcuam zoo thiab ze, kuj muab cov khoom lag luam customized raws li peb cov neeg siv khoom xav tau. Peb muaj ib pab neeg ua haujlwm zoo thiab txhawb nqa kev tswj tus kheej nrog lub tswv yim zoo, kev saib xyuas thiab kev cog lus los ntawm kev ua haujlwm hauv pab pawg, peb pab neeg siv zog ua kom tiav kev zoo siab rau peb cov neeg siv khoom thiab peb tus kheej. peb tsis tu ncua innovate peb cov khoom thiab txhim kho peb cov kev pab cuam, kev muag khoom network. Li no, peb pib thawj hom kev muag khoom ntawm net hauv Suav teb, uas yog cov khw muag khoom ntawm cov pob me me coj mus rau cov lag luam wholesale ntawm ntau hom kev tswj hwm. Peb cov khoom raug xa tawm mus rau Kaus Lim Qab Teb, Nyab Laj, Australia, Europe thiab South America, pom zoo los ntawm peb cov neeg siv khoom. Peb hais rau kev tswj hwm txoj cai "Kev ua lag luam yog peb lub compass, Zoo yog peb lub neej, Credit yog peb tus ntsuj plig". Cov neeg siv khoom ntseeg siab yog peb cov hmoov pem hauv ntej, lawv qhov kev txaus siab yog peb lub hom phiaj nyuaj.
Hom Kev Pabcuam Cov Neeg Siv Khoom:
Peb JIT cov neeg siv kev pabcuam tus account pab pawg hauv Suav teb tsim thiab siv cov tswv yim tsim los rau qhov zoo tshaj plaws ntawm peb cov neeg siv khoom nrog kev lag luam thiab cov tshuaj tshwj xeeb.
Koj qhov zoo:
● Kev pabcuam cov neeg siv khoom nruab nrab txhawb kev yooj yim ntawm cov txheej txheem kev tswj hwm, ua rau lub sijhawm thiab nqi txuag.
● Peb cov khoom siv hauv Suav teb thiab cov kev daws teeb meem zoo tshaj plaws los xyuas kom meej tias cov tshuaj zoo ib yam yog muab rau cov neeg siv khoom nrog ntau qhov chaw tsim khoom thiab pab txhawb kev ruaj ntseg hauv kev npaj thiab kev ntseeg siab ntawm cov txheej txheem.
● Peb cov txheej txheem tau ua kom zoo tsis tu ncua thiab hloov kho rau peb cov neeg siv khoom hloov cov qauv thiab cov kev xav tau.
Superiority ntawm Chemistry Logistics Service:
Cov kev pabcuam tshuaj lom neeg yog cov kws tshaj lij thiab yuav tsum ua kom zoo dua raws li UN tsis tu ncua, tshwj xeeb tshaj yog rau DGR Class series. Peb muab cov kev daws teeb meem tshwj xeeb los txhim kho kev xa khoom thiab tsim cov pab pawg thiab cov ntawv sau npe rau peb cov thawj coj. Peb cov chaw nres nkoj tseem ceeb hauv Suav teb nrog DGR cov chaw khaws tshuaj tshuaj yog ua haujlwm tshwj xeeb tshuaj thiab siv tag nrho cov ntaub ntawv txheeb ze.
Peb lub peev xwm faib khoom muaj xws li:
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