2-Bromo-5-nitropyridine CAS 4487-59-6

Ntseeg tshuaj yog ib tug ua Tuam Tshoj 2-Bromo-5-nitropyridine CAS 4487-59-6 chaw tsim tshuaj paus, tsum thiab exporter. Ua raws li kev ua raws li cov khoom lag luam zoo, kom peb cov 2-Bromo-5-nitropyridine CAS 4487-59-6 tau txaus siab los ntawm ntau tus neeg siv khoom. Shandong Ntseeg

Peb zoo ntawm qhov zoo ntawm cov khoom siv tshuaj lom neeg hauv thaj chaw. Peb cov khoom raug xa tawm mus rau Tebchaws Europe, Tebchaws Meskas, Nyiv, Kaus Lim Qab Teb, Sab Hnub Tuaj Asia thiab lwm lub tebchaws thiab cheeb tsam. Nrog rau kev tshawb fawb thiab thev naus laus zis raws li kev qhia, kev ncaj ncees raws li lub hauv paus, zoo li lub neej, thiab tso siab rau lub tswv yim kev lag luam ntawm kev tsim kho tshiab thiab kev loj hlob, peb cia siab tias yuav tsim kev sib pauv thiab kev koom tes nrog cov neeg siv khoom hauv tsev thiab txawv teb chaws los tsim kev vam meej!

2-Bromo-5-nitropyridine CAS 4487-59-6 Tshuaj Specification

2-Bromo-5-nitropyridine CAS 4487-59-6 Cov Khoom Siv Tshuaj

Melting point 139-141 ° C (lit.)
Kub taw tes 145-147 ° C / 10mmHg (lit.)
Qhov ceev 1.8727 (roughestimate)
Refractive index 1.6200 (kwv yees)
Flash point 145-147 ° C / 10mm
Cia tej yam kev mob Inertatmosphere, 2-8 ° C
Solubility Chloroform, HotMethanol
MorphologyCrystallinePowder
Acidity coefficient (pKa) - 3.24 ± 0.10 (Predicted)
ColorLightyellowtolight brown

2-Bromo-5-nitropyridine CAS 4487-59-6 Daim ntawv thov

Kev sib xyaw ntawm 1.53 g (10.94 mmol) ntawm 2-hydroxy-5-nitropyridine, 4.1 g (12.71 mmol) ntawm tetrabutylammonium bromide thiab 3.71 g (26.1 mmol) ntawm P2O5 hauv 29 ml ntawm benzene tau rhaub rau 1 teev. Cov sib tov tau txias rau hauv chav tsev kub, lub sab sauv txheej yog sib cais los ntawm decantation, thiab qis txheej yog triturated nrog benzene (3 x 6 ml). Cov extracts tau ua ke nrog cov organic theem, ntxuav nrog ib tug saturated tov ntawm NaHCO3 thiab NaCl, thiab qhuav dua MgSO4. Cov kuab tshuaj tau distilled tawm nyob rau hauv lub siab txo, thiab cov residue yog recrystallized los ntawm roj av ether. 1.7g (48%). Mp138-139°C, (bp40-70°C).