Khoom npe:acetic acid

Molecular hom:C2h4o2

Cas:64-19-7

Khoom molecular qauv:

Cov Lus Qhia Tshwj Xeeb:

Tshuaj Tshuaj Muaj Zog:

Acetic acid, ch3cooh, yog cov kua tsis muaj kob, cov kua uas tsis muaj kev kub hnyiab ntawm huab cua kub. Cov ntshiab placound, glacial acetic acid, tshuav nws lub npe rau nws cov dej khov-li crystalline tsos ntawm 15.6 ° C. Raws li feem ntau muab, acetic acid yog 6 n aqueous daws (txog 36%) lossis 1 tus kev daws teeb meem (txog 6%). Cov kev ua haujlwm no lossis lwm yam kev ua haujlwm tau siv hauv kev ntxiv cov nyiaj ua pob txha acid rau cov zaub mov. Acetic acid yog cov xeeb ntxwv acid ntawm vinegar, nws concentration xws li 3.5 txog 5.6%. Acetic acid thiab acetates yog tam sim no nyob rau hauv feem ntau cov nroj tsuag thiab tsiaj cov ntaub so ntswg nyob rau hauv me me tab sis kuaj tau nyiaj. Lawv yog cov metabolic nruab nrab, yog tsim los ntawm hom kab mob xws li acetobacacter thiab tuaj yeem suav ua ke los ntawm cov kab mob carbon dioxide los ntawm cov kab mob me me thermoaceticum. Cov nas cov qauv acetate ntawm tus nqi ntawm 1% ntawm nws lub cev hnyav ib hnub.

Raws li cov kua tsis muaj kob uas muaj zog, pungent, cov yam ntxwv tsw ntxhiab tsw, nws pab tau nyob rau hauv butter, cheese, txiv hmap thiab txiv hmab txiv ntoo qab zib. Tsawg heev me ntsis acetic acid li xws li siv nyob rau hauv cov zaub mov, txawm hais tias nws tau cais los ntawm FDA ua cov khoom siv gras. Yog li ntawd, nws yuav ua haujlwm hauv cov khoom uas tsis tau them los ntawm cov ntsiab lus thiab cov qauv ntawm tus kheej. Acetic Acid yog thawj lub tsev kawm ntawv cheebtsam ntawm cov kua txiv hmab thiab pyrolignoous acid. Nyob rau hauv daim ntawv ntawm vinegar, ntau dua 27 lab LB tau ntxiv rau cov khoom noj hauv xyoo 1986, nrog kwv yees li cov actomulants thiab cov neeg sawv cev. Qhov tseeb, acetic acid (raws li vinegar) yog ib qho ntawm cov tsw qab thaum ntxov tshaj plaws. Vinegars tau siv dav nyob rau hauv npaj zaub xam lav hnav khaub ncaws thiab mayonnaise, qaub thiab qab zib pickles thiab miv thiab miv. Lawv kuj tseem siv hauv kev kho nqaij thiab hauv cov canning ntawm qee cov zaub. Hauv kev tsim cov mayonnaise, ntxiv rau ntawm ib feem ntawm acetic acid (vinegar) rau ntsev- lossis piam thaj-yolk txo cov kub ua rau tus pas ntsuas kub. Cov dej khi cov khoom siv ntawm cov hnyuv feem ntau suav nrog cov acetic acid lossis nws cov ntsev ntsev, thaum cov zaub caletium los khaws cia cov zaub mov, cov zaub hauv kaus poom.

Daim Ntawv Thov:

1.Txhua nyob rau hauv synthesis ntawm dyes thiab inks.

2. Nws yog siv nyob rau hauv synthesis ntawm cov ntxhiab.

3. Nws yog siv hauv roj hmab thiab kev lag luam yas. Nws yog siv los ua cov kuab tshuaj thiab pib cov khoom rau ntau pva (xws li PVA, tsiaj, thiab lwm yam.

4. Nws yog siv los ua cov khoom pib rau cov xim thiab pleev xim nplaum

5. Nws yog siv rau hauv kev ua khoom noj ua khoom noj ua ib qho kev ntxiv hauv cheese thiab cov kua ntses thiab ua cov khoom noj khoom haus khaws cia.

Acetic acid - kev nyab xeeb

Qhov ncauj ld50 rau nas: 3530mg / kg; Percutaneous LDSO rau luav: 1060MG / kg; Inhalation THLC50 rau cov nas: 13791mg / m3. Corrosive. Inhalation ntawm cov khoom lag luam no yog khaus rau qhov ntswg, caj pas thiab kev ua pa ua pa. Muaj zog khaus rau qhov muag. Kev tiv thaiv, yaug nrog dej ntws. Nws yog nruj me ntsis txwv nrog oxidizer, alkali, tshuaj noj muaj roj, thiab lwm yam khaws cia rau hauv lub tsev rau khoom txias, tshuab ua kom huv. Tseg deb ntawm hluav taws thiab cov khoom cua sov. Khaws lub thawv ntim. Khaws cais los ntawm oxidizers thiab alkalis.