Crotonic acid, tseem hu ua butyric acid, nws muaj cis thiab trans isomers.
Hauv kev daws, nws yog trans butenoic acid. Nws yog ib hom rog tsis muaj cov roj ua kom tsis muaj zog, uas muaj ob chav sib txuas thiab pawg carboxyl hauv lub lev, thiab muaj lub zog ua kom rov qab. Nws muaj ntau hom kev siv, feem ntau yog siv hauv kev npaj ntawm ntau cov resins, fungicides, txheej txheej saum npoo, fungicides, plasticizers; nws tseem tuaj yeem raug siv ua cov tshuaj lag luam tseem ceeb intermediates, ua liaj ua teb intermediates thiab lwm yam organic tshuaj nruab nrab. Ib qho ntawm cov kev siv tseem ceeb tshaj plaws yog cov khoom raw ntawm cov tshuaj polyvinyl acetate txheej.
Tsos: monoclinic acicular los yog prismatic crystal.
Qhov hloov isomer muaj lub ntsiab lus ploj ntawm 71.4-71.7 ℃, kub taw tes ntawm 184.7 ℃, mp.69-73 ° C, PKA 4.17 (18C), ntu txheeb ze ntawm 1.018 (15/4 ℃), qhov ntsuas qhov ntsuas ntawm 1.4228. Qhov solubility ntawm trans isomer hauv 100ml dej ntawm 25 ℃ yog 9.4g, soluble hauv ethanol, ether thiab acetone, thiab hloov mus rau CIS crotonic acid nyob rau hauv kev daws toluene.
Cis isomer muaj qhov xav tau ntawm 15.5 ℃, qhov kub taw tes ntawm 169 ℃ (103kpa), MP. 69-73 ° C, txheeb ze ntom ntawm 1.0265 (20/4 ℃), qhov ntsuas rov qab ntawm 1.4456. Kev solubility ntawm cis isomer hauv 100ml (20 ℃) dej yog 7.61g thiab soluble hauv ethanol. Thaum rhuab nrog 60% sulfuric acid, kab hydrochloric acid lossis hydrogen bromide, nws tuaj yeem hloov mus rau hauv trans crotonic acid, thiab nws cov tawv nqaij ua kom tawv nqaij zoo ib yam li acrylic kua qaub.
Crotonic acid kuj tseem siv los npaj ntau yam resins, fungicides, txheej saum npoo av, fungicides thiab plasticizers.
Thov hu rauinfo@konochemical.comyog tias koj muaj lus nug ntxiv.
