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Khoom npe:Ethyl acetate hmoov

Molecular hom:C4H8O2

CAS Nr:141-78-6 : kuv

Cov khoom siv molecular:

Chemical Properties:

Ethyl acetate (cov qauv qhia saum toj no) yog cov ester paub zoo tshaj plaws rau ntau tus tub ntxhais kawm chemistry thiab tejzaum nws yog ester nrog ntau yam kev siv. Esters yog tsim los ntawm carboxylic acids los ntawm kev hloov cov acidic hydrogen los ntawm ib pawg alkyl lossis aryl. Ethyl acetate nws tus kheej yog cov kua tsis muaj xim nyob rau hauv chav tsev kub nrog ib tug qab ntxiag "fruity" tsw, bp 77 ° C.

Ethyl acetate muaj ntau yam kev siv, xws li cov txiv hmab txiv ntoo uas muaj txiaj ntsig zoo thiab cov tshuaj tsw qab, cov khoom qab zib rau cov khoom qab zib, ice cream thiab ncuav qab zib, ua cov kuab tshuaj hauv ntau daim ntawv thov (xws li decaffeinating tshuaj yej thiab kas fes) rau cov kua roj vanish thiab xim (cov kua roj vanish tshem tawm), thiab rau kev tsim cov luam ntawv inks thiab naj hoom.

Daim ntawv thov:

Ethyl acetate feem ntau yog siv los ua cov kuab tshuaj thiab diluent, tau txais kev nyiam vim nws tus nqi qis, tsis muaj tshuaj lom, thiab pom zoo tsw. Piv txwv li, nws yog feem ntau siv los ntxuav cov laug cam thiab hauv qee cov kua roj vanish tshem tawm (acetone thiab acetonitrile kuj siv). Cov taum kas fes thiab tshuaj yej nplooj yog decaffeinated nrog cov kuab tshuaj no.Nws kuj yog siv rau hauv cov xim ua ib qho activator lossis hardener. Hauv cov tshuaj tsw qab, nws evaporates sai sai, tsuas yog cov ntxhiab tsw ntawm cov tshuaj tsw qab ntawm daim tawv nqaij.
3 – 1 – Laboratory siv
Hauv chav kuaj, cov khoom sib xyaw uas muaj ethyl acetate feem ntau yog siv hauv kem chromatography thiab extractions. Ethyl acetate tsis tshua raug xaiv los ua cov tshuaj tiv thaiv hnyav vim tias nws nquag ua rau hydrolysis thiab trans esterification.
3 - 2 - tshwm sim hauv cawv
Ethyl acetate yog cov ester ntau tshaj plaws hauv cov cawv txiv hmab, yog cov khoom lag luam ntawm cov organic acids uas tsis muaj zog tshaj plaws - acetic acid, thiab ethyl cawv tsim thaum lub sij hawm fermentation. Lub aroma ntawm ethyl acetate yog qhov tseeb tshaj plaws nyob rau hauv cov hluas wines thiab pab txhawb rau kev nkag siab ntawm "fruitiness" hauv cov cawv txiv hmab.
3 – 3 – Entomological tua neeg sawv cev
Nyob rau hauv lub tshav pob ntawm entomology, ethyl acetate yog ib tug zoo asphyxiant siv nyob rau hauv kev sau kab thiab kawm. Nyob rau hauv ib lub hub tua raug them nrog ethyl acetate, cov vapors yuav tua cov kab uas sau tau (feem ntau yog cov neeg laus) sai sai yam tsis muaj kev puas tsuaj. Vim tias nws tsis yog hygroscopic, ethyl acetate kuj ua rau cov kab mos txaus kom tso cai rau kev sib txuas kom haum rau kev sau.