Bromocresol Ntshav CAS 115-40-2

Bromocresol Ntshavyog ib tug me ntsis yellowish rose crystal hmoov. Insoluble hauv dej, daj hauv ethanol, ntshav hauv dilute sodium hydroxide thiab dilute sodium carbonate tov, melting point 241-242 degree . Cov kev siv tseem ceeb ntawm cov ntshiab bromocresol violet yog cov kua qaub-puag qhia thiab qhov taw qhia tsis yog aqueous titration.

Yuav ua li cas los tsim cov khoom no?

1. Dissolve ortho toluidine hauv dilute sulfuric acid, txias, thiab ntxiv sodium nitrite tov nrog nplawm. Cov tshuaj tiv thaiv kub yuav tsum tau tswj qis dua 5 degree. Tom qab cov tshuaj tiv thaiv tiav, cua sov mus rau 40-50 degree kom txog thaum tsis muaj npuas tshwm sim, txias thiab lim, thiab kho cov o-cresol los ntawm fractional distillation. Sib tov ortho cresol nrog ortho toluenesulfonic anhydride thiab chloroform zinc, do thiab tshav kub, react ntawm 115-120 degree rau 7 teev, tshem tawm cov seem ortho cresol los ntawm chav, lim kom tau ortho cresol liab: ortho cresol liab yog refined thiab yaj nyob rau hauv glacial acetic acid, thiab sib tov tov ntawm bromine thiab glacial acetic acid yog ntxiv nyob rau hauv nplawm. Tom qab ntxiv, kub ntawm 40-50 degree rau 4 teev, txias thiab lim kom tau bromocresol ntshav.
2. Dissolve cov reagents toluene phenol liab thiab bromine nyob rau hauv acetic acid los npaj ib tug tov, thiab ces ntxiv bromine acetic acid tov rau toluene phenol liab acetic acid tov thaum stirring:
Do tsis tu ncua ntawm 40-50 degree rau ntau tshaj 4 teev, nres cua sov, txias, lim, ntxuav cov crystals nrog benzene, thiab ces qhuav kom tau bromocresol ntshav.

Yuav siv cov khoom no li cas?

1. Acid-base qhia, zoo ib yam li bromocresol ntsuab, cov qauv ntawm bromocresol ntshav yuav hloov nrog pH nqi. Cov xim hloov los ntawm lub teeb daj mus rau purplish liab, uas yog siv los ua ib qho kev qhia ntawm cov kab mob loj hlob hauv qee qhov kev ntsuam xyuas microbiological.

2. Nyob rau hauv tus txheej txheem ntawm kev yees duab kev loj hlob, nws yuav siv tau raws li ib tug additive nyob rau hauv acid nres tank qhia tias lub tank tov tau mus txog nruab nrab pH nqi thiab yuav tsum tau hloov.

Muaj ntau txoj kev xa khoom rau koj xaiv

Peb lub zog:

Peb lub tuam txhab tau dhau los ntawm FDA thiab ISO19001 kev tswj hwm qhov system ntawv pov thawj. Thiab peb muaj kev koom tes nrog kev cog lus nrog ntau lub Hoobkas thiab chaw kuaj hauv Suav teb, Peb lub tuam txhab tuaj yeem muabBromocresol Ntshavlwm. ntawm tus nqi zoo dua. Yog tias koj txaus siab, thov sau ib tsab ntawv.

Peb tsis tsuas yog muaj qhov tshwj xeeb zoo hauv kev thauj mus los, tab sis kuj txhawb ntau txoj kev them nyiaj, txawm tias koj siv nyiaj US, euros, Australian las, lossis cov nyiaj hauv zos los ntawm Singapore, Malaysia, Thaib, thiab lwm yam. Peb kuj tuaj yeem txhawb cov txiaj ntsig hauv zos hauv cov cheeb tsam thiab cov tebchaws no. Tsis tas li ntawd, peb kuj txhawb nqa cov npav hauv txhab nyiaj (credit cards, thiab lwm yam) rau kev them nyiaj.

Tsis lees paub: Cov ntaub ntawv luam tawm ntawm lub vev xaib no los ntawm Is Taws Nem, tsis tau txhais hais tias lub vev xaib no pom zoo nrog nws cov kev xav lossis lees paub qhov tseeb ntawm cov ntsiab lus. Thov ua tib zoo saib kom paub qhov txawv. Tsis tas li ntawd, cov khoom muab los ntawm peb lub tuam txhab tsuas yog siv rau kev tshawb fawb tshawb fawb. Peb tsis muaj lub luag haujlwm rau qhov tshwm sim ntawm kev siv tsis raug.

Yog tias koj txaus siab rau peb cov khoom, lossis muaj cov lus qhia tseem ceeb ntawm peb cov khoom lossis tsis txaus siab rau cov khoom tau txais, thov hu rau peb los ntawmEmail :sales6@faithfulbio.com  . Peb pab neeg tau cog lus los ua kom tiav kev txaus siab ntawm cov neeg siv khoom.

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