(E)-Methyl 4-bromocrotonate (CAS # 6000-00-6)
Risk thiab Safety
| Hazard Cov Cim | Xi-xaj |
| Risk Codes | R37/38 - Kab mob ua pa thiab tawv nqaij. R41 - Riam phom loj rau qhov muag R36/37/38 - Kab mob rau qhov muag, ua pa thiab tawv nqaij. |
| Kev nyab xeeb piav qhia | S26 - Thaum sib cuag nrog lub qhov muag, yaug tam sim ntawd nrog dej txaus thiab nrhiav kev kho mob. S39 - Hnav qhov muag / ntsej muag tiv thaiv. |
| WGK Germany | 3 |
| RTECS | Q3120000 |
| FLUKA BRAND F CODE | 8-9 |
| HS Code | 29161900 ib |
Taw qhia
Trans-4-bromo-2-butenoic acid methyl ester yog cov kua tsis muaj xim uas muaj ntxhiab tsw tshwj xeeb. Nws muaj qhov ntom ntom ntawm 1.49g / cm3, qhov kub ntawm qhov kub ntawm 171-172 ° C, thiab qhov kub ntawm 67 ° C. Nws yog insoluble nyob rau hauv dej ntawm chav tsev kub, tab sis nws yog miscible nrog organic solvents xws li ethanol, ether, thiab lwm yam.
Siv:
Trans-4-bromo-2-butenoic acid methyl ester feem ntau yog siv los ua ib qho nruab nrab hauv cov organic synthesis tshuaj. Nws tuaj yeem siv rau kev sib txuas ntawm lwm cov organic tebchaw, piv txwv li rau kev sib txuas ntawm cov tshuaj hauv tshuaj chemistry thiab tshuaj tua kab.
Txoj Kev Npaj:
Trans-4-bromo-2-butenoic acid methyl ester feem ntau yog npaj los ntawm cov tshuaj tiv thaiv bromination thiab esterification cov tshuaj tiv thaiv. Butene yog thawj reacted nrog bromine muab 4-bromo-2-butene, uas yog ces esterified nrog methanol muab trans-4-bromo-2-butenoic acid methyl ester.
Cov ntaub ntawv kev nyab xeeb:
Trans-4-bromo-2-butenoic acid methyl ester yog ib yam ntawm cov organic hnyav thiab tshuaj raw khoom, uas muaj tej yam txaus ntshai. Nws yog khaus thiab corrosive, thiab kev sib cuag nrog daim tawv nqaij, ob lub qhov muag lossis ua pa ua pa tuaj yeem ua rau khaus thiab raug mob. Kev sib cuag ncaj qha yuav tsum raug zam thaum siv, thiab kev tiv thaiv ua pa tsim nyog thiab hnav khaub ncaws tiv thaiv yuav tsum tau noj. Tsis tas li ntawd, yuav tsum tau saib xyuas kom tsis txhob muaj kev sib cuag nrog cov oxidants thiab cov kua qaub uas muaj zog thaum khaws cia kom tsis txhob muaj kev phom sij txaus ntshai. Yog tias koj xav siv qhov sib xyaw no, thov ua haujlwm hauv qhov chaw nyab xeeb thiab ua raws li cov txheej txheem ua haujlwm nyab xeeb.
