3-BROMO-4-METHOXY-PYRIDINE (CAS # 82257-09-8)
| Hazard Cov Cim | Xn – Ua phem |
| Risk Codes | R22 - Ua phem yog tias nqos R37/38 - Kab mob ua pa thiab tawv nqaij. R41 - Riam phom loj rau qhov muag |
| 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. |
Taw qhia
3-bromo-4-methoxypyridine yog cov organic compound nrog cov tshuaj formula C6H6BrNO thiab molecular hnyav ntawm 188.03. Cov hauv qab no yog cov lus piav qhia ntawm nws qhov xwm txheej, kev siv, kev npaj thiab cov ntaub ntawv kev nyab xeeb:
Xwm:
1. Cov tsos mob: 3-bromo-4-methoxypyridine yog lub teeb daj mus rau cov khoom daj.
2. solubility: soluble nyob rau hauv organic solvents xws li ether thiab chlorinated hydrocarbons, insoluble nyob rau hauv dej.
3. melting point: txog 50-53 ℃.
4. Ceev: txog 1.54 g/cm.
Siv:
3-bromo-4-methoxypyridine yog ib qho tseem ceeb ntawm cov organic synthesis nruab nrab, feem ntau siv rau hauv kev sib txuas ntawm cov tshuaj tua kab, tshuaj thiab lwm yam organic tebchaw. Nws muaj ntau yam kev siv hauv kev tshawb fawb tshuaj thiab tshuaj.
Txoj Kev Npaj:
3-bromo-4-methoxypyridine feem ntau yog tsim los ntawm cov kauj ruam hauv qab no:
1. 2-bromo-5-nitropyridine yog reacted nrog methanol kom tau 2-methoxy-5-nitropyridine.
2. 2-methoxy-5-nitropyridine reacts nrog cuprous bromide npaj nrog sulfuric acid kom tau 3-bromo-4-methoxypyridine.
Cov ntaub ntawv kev nyab xeeb:
1. 3-bromo-4-methoxypyridine yog khaus thiab yuav tsum tsis txhob sib cuag nrog daim tawv nqaij, qhov muag thiab ua pa.
2. hauv kev tuav thiab siv, yuav tsum hnav cov khoom tiv thaiv tus kheej tsim nyog, xws li hnab looj tes thiab tsom iav tiv thaiv.
3. Kev khaws cia yuav tsum tiv thaiv kev sib cuag nrog cov oxidants thiab cov kua qaub uas muaj zog, thiab khaws lub thawv ntim.
4. Raws li kev siv tsim nyog thiab kev cia khoom, 3-bromo-4-methoxypyridine yog cov tshuaj muaj txiaj ntsig zoo, tab sis nws tseem yuav tsum tau ua haujlwm ceev faj.
