(E)-Methyl 4-bromocrotonate (CAS# 6000-00-6)
Ubungozi Nokuphepha
| Izimpawu Eziyingozi | Xi - Irritant |
| Amakhodi Engozi | R37/38 – Ukucasula uhlelo lokuphefumula kanye nesikhumba. R41 – Ingozi yokulimala okubi emehlweni R36/37/38 – Ukucasula amehlo, uhlelo lokuphefumula kanye nesikhumba. |
| Incazelo Yokuphepha | S26 – Uma uthintana namehlo, geza ngokushesha ngamanzi amaningi futhi ufune iseluleko sezokwelapha. S39 – Gqoka ukuvikela iso / ubuso. |
| I-WGK Germany | 3 |
| I-RTECS | GQ3120000 |
| AMAKHODI E-FLUKA BRAND F | 8-9 |
| Ikhodi ye-HS | 29161900 |
Isingeniso
I-Trans-4-bromo-2-butenoic acid i-methyl ester iwuketshezi olungenambala olunephunga elikhethekile. Inokuminyana okungaba ngu-1.49g/cm3, indawo yokubilisa ecishe ibe ngu-171-172°C, kanye nephuzu elibalulayo elicishe libe ngu-67°C. Ayincibiliki emanzini ngamazinga okushisa asekamelweni, kodwa iyaxubana nezinyibilikisi zemvelo ezifana ne-ethanol, i-ether, njll.
Sebenzisa:
I-Trans-4-bromo-2-butenoic acid i-methyl ester isetshenziswa kakhulu njengendawo ephakathi kokusabela kwe-organic synthesis. Ingasetshenziselwa ukuhlanganiswa kwezinye izinhlanganisela eziphilayo, isibonelo ukuhlanganiswa kwenhlanganisela kumakhemikhali okwelapha kanye nekhemistri yesibulala-zinambuzane.
Indlela Yokulungiselela:
I-Trans-4-bromo-2-butenoic acid i-methyl ester ivamise ukulungiswa ngokusabela kwe-bromination nokusabela kwe-esterification. I-Butene iqala ukusabela nge-bromine ukuze inikeze i-4-bromo-2-butene, ebuye ifakwe i-esterified nge-methanol ukuze inikeze i-trans-4-bromo-2-butenoic acid i-methyl ester.
Ulwazi Lokuphepha:
I-Trans-4-bromo-2-butenoic acid i-methyl ester iwuhlobo lwe-organic solvent ne-chemical material eluhlaza, enobungozi obuthile. Kuyacasula futhi kudla, futhi ukuthintana nesikhumba, amehlo noma umgudu wokuphefumula kungabangela ukucasuka nokulimala. Ukuthintana okuqondile kufanele kugwenywe ngesikhathi sokusetshenziswa, futhi kufanele kuthathwe ukuvikelwa okufanele kokuphefumula kanye nezingubo zokuzivikela. Ngaphezu kwalokho, kufanele kuqashelwe ukugwema ukuthintana nama-oxidants nama-acids aqinile ngesikhathi sokugcinwa ukuze kuvinjelwe ukusabela okuyingozi. Uma udinga ukusebenzisa lesi sakhiwo, sicela usebenze endaweni ephephile futhi ulandele izinqubo zokusebenza eziphephile ezifanele.
