2 5-Dibromo-4-methylpyridine (CAS # 3430-26-0)
| Risk Codes | R36/37/38 - Kab mob rau qhov muag, ua pa thiab tawv nqaij. R20/21/22 - Ua phem los ntawm kev nqus pa, tiv thaiv daim tawv nqaij thiab yog tias nqos. R41 - Riam phom loj rau qhov muag R37/38 - Kab mob ua pa thiab tawv nqaij. R22 - Ua phem yog tias nqos |
| Kev nyab xeeb piav qhia | S36/37/39 - Hnav cov khaub ncaws tiv thaiv tsim nyog, hnab looj tes thiab tiv thaiv qhov muag / ntsej muag. 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 |
| HS Code | 2933399 ib |
| Kev Ceeb Toom | Ua phem |
| Hazard Class | IRRITANT |
Taw qhia
2,5-Dibromo-4-methylpyridine yog ib qho organic compound. Cov hauv qab no yog cov ncauj lus kom ntxaws txog cov khoom, kev siv, kev npaj thiab cov ntaub ntawv kev nyab xeeb ntawm cov khoom sib xyaw no:
Zoo:
2,5-Dibromo-4-methylpyridine yog ib yam khoom uas tsis muaj xim rau yellowish crystalline cov ntaub ntawv. Nws muaj zog solubility thiab soluble nyob rau hauv ntau cov organic solvents. Nws yog ib qho chaw tsis ruaj khov uas tawg yooj yim hauv tshav ntuj.
Siv:
Cov tshuaj no feem ntau yog siv los ua raw khoom thiab reagent hauv organic synthesis.
Txoj kev:
2,5-Dibromo-4-methylpyridine yog npaj los ntawm cov tshuaj tiv thaiv ntawm brominated p-toluene thiab pyridine. P-toluene reacts nrog cuprous bromide rau daim ntawv 2-bromotoluene, uas tom qab ntawd reacts nrog pyridine nyob rau hauv acid catalysis los tsim ib tug kawg khoom.
Cov ntaub ntawv kev nyab xeeb:
2,5-Dibromo-4-methylpyridine yuav tsum tau ua tib zoo saib xyuas vim nws yog cov tshuaj lom neeg. Yuav tsum tau saib xyuas kom tsis txhob muaj kev sib cuag nrog daim tawv nqaij, qhov muag, thiab ua pa thaum ua haujlwm. Cov cuab yeej tiv thaiv tus kheej tsim nyog xws li hnab looj tes, looj tsom iav, thiab lub ntsej muag tiv thaiv yuav tsum hnav thaum siv hauv chav kuaj. Thaum khaws cia thiab tuav, nws yuav tsum khaws cia kom deb ntawm cov khoom siv hluav taws xob thiab cov oxidizing tus neeg sawv cev. Yog tias cov khoom nqos los yog nqus tau los ntawm qhov yuam kev, kev kho mob yuav tsum tau nrhiav tam sim ntawd. Thaum pov tseg cov khoom pov tseg, cov kev cai hauv zos yuav tsum tau ua raws thiab cov pov tseg yuav tsum tau muab pov tseg kom zoo kom tsis txhob muaj kuab paug rau ib puag ncig.
