2 5 Difluorobenzylbromide (CAS # 85117-99-3)
| Risk Codes | R11 - Cov nplaim hluav taws kub heev R34 - Ua rau kub hnyiab R22 - Ua phem yog tias nqos R36 - Khau 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. S36/37/39 - Hnav cov khaub ncaws tiv thaiv tsim nyog, hnab looj tes thiab tiv thaiv qhov muag / ntsej muag. S45 - Thaum muaj xwm txheej lossis yog tias koj tsis xis nyob, nrhiav kev kho mob tam sim ntawd (qhia daim ntawv lo thaum twg ua tau.) S16 - Khaws kom deb ntawm qhov chaw hluav taws xob. |
| UN IDs | UN 2924 3/PG 2 |
| WGK Germany | 3 |
| HS Code | 2 903990 |
| Kev Ceeb Toom | Corrosive / Lachrymatory |
| Hazard Class | 8 |
| Packing Group | III |
Taw qhia
2,5-Difluorobenzyl bromide Cov hauv qab no yog kev qhia txog nws qhov xwm txheej, kev siv, kev npaj thiab cov ntaub ntawv kev nyab xeeb:
Zoo:
Cov tsos mob: 2,5-benzyl difluorobromide yog cov kua tsis muaj xim lossis daj me ntsis.
Qhov ceev: 1.74-1.76 g / cm³.
Solubility: Soluble nyob rau hauv organic solvents xws li cawv, ethers thiab non-polar solvents.
Siv:
2,5-difluorobenzyl bromide feem ntau yog siv los ua cov khoom nruab nrab thiab cov khoom siv raw hauv cov organic synthesis.
Hauv cov organic synthesis, nws feem ntau yog siv rau fluorination ntawm olefins thiab xaiv fluorination ntawm cov tshuaj tsw qab.
Txoj kev:
Kev npaj ntawm 2,5-difluorobenzyl bromide tuaj yeem ua tiav los ntawm cov kauj ruam hauv qab no:
Ua ntej, 2,5-dibromobenzyl thiab trifluoroacetic acid yog reacted thiab refluxed nyob rau hauv ib tug gas condensate los yog dej los npaj 2,5-difluorobenzylbromide kua.
Cov khoom ntshiab 2,5-difluorobenzyl bromide yog ces crystallized, lim, thiab qhuav.
Cov ntaub ntawv kev nyab xeeb:
2,5-difluorobenzyl bromide muaj qee yam toxicity, thiab yuav tsum tau ceev faj txog kev nyab xeeb thaum siv, tsis txhob sib cuag nrog daim tawv nqaij, qhov muag thiab ua pa.
Thaum siv thiab npaj, cov cuab yeej tiv thaiv tsim nyog xws li kuaj cov hnab looj tes, tsom iav, thiab cov qhov ncauj qhov ntswg tiv thaiv yuav tsum tau muab.
Nws yuav tsum tau ua nyob rau hauv ib qho chaw zoo-ventilated thiab tsis txhob sib cuag nrog ignition qhov chaw thiab oxidants.
Thaum khaws cia, 2,5-difluorobenzyl bromide yuav tsum tau khaws cia rau hauv qhov chaw txias, qhuav thiab qhov cua, kom deb ntawm hluav taws thiab combustibles.
Thov ua raws li kev soj ntsuam kom raug thiab cov lus qhia kev nyab xeeb thaum siv thiab tuav 2,5-difluorobenzyl bromide.
