2 5-dibromo-6-methylpyridine (CAS # 39919-65-8)
Risk thiab Safety
| Risk Codes | R20/21/22 - Ua phem los ntawm kev nqus pa, tiv thaiv daim tawv nqaij thiab yog tias nqos. R36/37/38 - Kab mob rau qhov muag, ua pa thiab tawv nqaij. R41 - Riam phom loj rau qhov muag R22 - Ua phem yog tias nqos |
| 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. S36/37/39 - Hnav cov khaub ncaws tiv thaiv tsim nyog, hnab looj tes thiab tiv thaiv qhov muag / ntsej muag. |
| UN IDs | UN 2811 6.1/PG 3 |
| WGK Germany | 3 |
| HS Code | 293339 0 |
| Kev Ceeb Toom | Ua phem |
| Hazard Class | IRRITANT |
| Packing Group | III |
2 5-dibromo-6-methylpyridine (CAS#)39919-65-8) Taw qhia
2,5-Dibromo-6-methylpyridine yog ib qho organic compound. Cov hauv qab no yog kev qhia txog nws cov khoom, kev siv, kev npaj thiab cov ntaub ntawv kev nyab xeeb:
Khoom:
Cov tsos mob: 2,5-Dibromo-6-methylpyridine yog cov xim tsis muaj xim lossis lub teeb daj.
Solubility: Nws yog soluble hauv qee cov kuab tshuaj organic, xws li ethanol, ether thiab ester cov kuab tshuaj.
Kev Siv: Nws tuaj yeem siv rau hauv cov organic synthesis los qhia cov pab pawg methyl lossis ua bromination reagent.
Txoj kev npaj:
Txoj kev npaj ntawm 2,5-Dibromo-6-methylpyridine tuaj yeem ua tiav los ntawm cov kauj ruam hauv qab no:
Dissolve 2,6-dimethylpyridine hauv cawv, ketone lossis ester hnyav.
Ntxiv bromine los yog bromination reagent rau cov tshuaj tiv thaiv.
Cov tshuaj tiv thaiv yog nqa tawm ntawm qhov kub thiab txias, thiab lub sijhawm tshuaj tiv thaiv feem ntau yog ntev dua.
Tom qab tau txais cov khoom, nws tuaj yeem muab rho tawm thiab ua kom huv los ntawm distillation lossis crystallization purification txoj kev.
Cov ntaub ntawv kev nyab xeeb:
2,5-Dibromo-6-methylpyridine yog tshuaj lom rau qee yam thiab ua rau tawv nqaij thiab qhov muag. Kev sib cuag ncaj qha yuav tsum zam. Thaum lub sijhawm ua haujlwm, cov cuab yeej tiv thaiv tsim nyog yuav tsum hnav, xws li hnab looj tes thiab tsom iav. Kev khiav hauj lwm yuav tsum tau ua nyob rau hauv ib qho chaw zoo-ventilated kom tsis txhob nqus cov pa phem. Thaum muab pov tseg, nws yuav tsum tau ua raws li cov cai hauv zos. Thaum siv lossis khaws cia 2,5-dibromo-6-methylpyridine, yuav tsum tau saib xyuas kom tsis txhob muaj hluav taws kub thiab kub.
