Cov neeg nruab nrab

Vim Li Cas Xaiv Peb

Kev paub nplua nuj

Founded hauv 2009, Shanghai Exquisite yog ib lub tuam txhab tshwj xeeb hauv kev tsim thiab muab APIs thiab tshuaj.

Kev txawj ntse

Shanghai Exquisite koom tes nrog Tianjin University thiab Shanghai lub koom haum ntawm Organic Chemistry los tsom rau kev tshawb fawb thiab kev tsim kho cov khoom kho mob.

Zoo Guaranteed

Peb cov khoom tau dhau ISO 9001, HACCP, FSSC22000, SC thiab CFDA, Kaus Lim Kauslim FDA, EU GMP thiab lwm cov ntawv pov thawj zoo, nrog rau KOSHER thiab HALAL ntawv pov thawj.

Kev muag khoom thoob ntiaj teb

Peb cov khoom tau raug xa tawm mus rau Tebchaws Europe, Tebchaws Asmeskas, Is Nrias teb, South Asia, Southeast Asia thiab lwm thaj chaw, thiab tau lees paub thiab qhuas los ntawm kev ua lag luam thiab cov neeg siv khoom.

Tsev 12 3 Rau sab kawg 1/3

Txhais ntawm Intermediates

Hauv chemistry, cov tshuaj tiv thaiv nruab nrab, lossis nruab nrab, yog ib qho chaw molecular tshwm sim nyob rau hauv qhov sib lawv liag ntawm cov tshuaj tiv thaiv stepwise. Nws yog tsim raws li cov tshuaj tiv thaiv cov khoom ntawm ib theem pib, los ntawm cov reactants thiab / los yog cov intermediates ua ntej, tab sis yog noj nyob rau hauv ib tug tom qab kauj ruam. Nws tsis tshwm sim hauv kev sib npaug tshuaj rau tag nrho cov tshuaj tiv thaiv.

Cia peb qhia qee yam khoom tseem ceeb rau koj!

Azodicarbonamide yog dab tsi?

Azodicarbonamide yog hmoov dawb los yog lub teeb daj. Nws yog non-toxic, odorless, non-flammable thiab self-extinguishing. Soluble hauv alkali, insoluble hauv roj av, cawv, benzene, pyridine thiab dej; Cov tshuaj formula yog C2H4N4O2, thiab cov mis molecular yog NH2CON=NCONH2.

Azodicarbonamide yog tus neeg sawv cev foaming uas feem ntau siv hauv kev lag luam. Nws tuaj yeem siv rau hauv kev tsim cov yoga lev thiab cov roj hmab soles kom nce elasticity ntawm cov khoom. Nws kuj tuaj yeem siv rau hauv kev lag luam khoom noj kom nce lub zog thiab hloov pauv ntawm cov khob noom cookie.

Kev siv AC Blowing Agent

Siv nyob rau hauv zus tau tej cov yoga mats, roj hmab soles, khau thiab lwm yam, kom cov khoom yooj yooj yim.

Siv nyob rau hauv kev lag luam khoom noj khoom haus kom muaj zog thiab yooj ntawm lub khob noom cookie.

Rau foaming ntawm PVC, polyethylene, polypropylene, ABS resin thiab roj hmab.

Kev siv Azodicarbonamide

Thaum peb siv cov khoom lag luam nkaus xwb, nws tuaj yeem tsim cov qauv me me, zoo thiab cov qauv stomatal. Cov khoom ua npuas ncauj yog odorless, tasteless, non-pollution thiab colourstay, yog li nws yog heev haum rau cov khoom ua npuas ncauj uas tsis muaj ntxhiab tsw thiab nrog lub teeb xim.
Cov khoom siv tuaj yeem siv rau cov roj hmab ntuj (xws li EPDM, SBR, CR, FKM, IIR, NBR), hluavtaws roj hmab (xws li PVC, PE, PS, ABS) thiab cov khoom siv thermoplastic. Nws kuj yog siv los ua cov roj hmab-resin sib tov.
Cov khoom lag luam muaj kev tiv thaiv zoo thiab tuaj yeem siv los ua hlau thiab cable.
Hauv qee qhov xwm txheej, nws tuaj yeem siv los ua tus neeg sawv cev foaming nrog rau corss-lingking tus neeg saib xyuas hauv kev kho cov txheej txheem.
Cov khoom no yog cov feem ntau siv foaming tus neeg sawv cev. Nws tuaj yeem ua nws lub luag haujlwm nrog lwm tus neeg ua npuas ncauj. Raws li nws siv dav, OBSH tseem hu ua universal foaming agent.

Cia ntawm AC Blowing Agent

Nws tsis muaj ntxhiab tsw thiab tsis muaj tshuaj lom, nrog kev ruaj ntseg zoo thiab yuav tsis decompose nyob rau hauv qhov kub thiab txias tab sis yuav tsum tau muab cia rau hauv qhov chaw txias, qhuav qhov chaw deb ntawm txhua qhov chaw ntawm tshav kub, txim taws, qhib nplaim taws lossis ncaj qha tshav ntuj.

Tsis txhob cia nws tiv tauj ncaj qha nrog cov kua qaub lossis alkalis. Kev tso pa tawm hauv zos zoo hauv kev sib xyaw thiab tuav cov chaw yog pom zoo.

Ceev faj tsis txhob nqus nws cov hmoov, ua rau tawv nqaij sib cuag lossis nqos nws.

Lambda Cyhalothric Acid yog dab tsi?

Lambda-Cyhalothric Acid yog ib qho tseem ceeb nruab nrab chrysanthemic acid ntau yam rau cov synthesis ntawm pyrethroid insecticides, los ntawm uas nws yuav siv tau los ua ke zoo pyrethroids.

Lambda-Cyhalothric Acid yog ib qho nruab nrab rau kev npaj cov pyrethroids xws li beta-cyhalothrin (Kungfu chrysanthemum), transfluthrin thiab bifenthrin.

Lambda Cyhalotric Acid Properties

CAS DataBase Reference	72748-35-7
Melting Point	107-109 degree
Boiling Point	271.6 ± 4 0.0 degree (Predicted)
Qhov ntom	1.152
Solubility	Chloroform (Sparingly, Sonicated), DMSO (me ntsis), Methanol (me ntsis)
Daim ntawv	Khoom
Pka	3.91 ± 0.42 (Tshaj tawm)
Xim	Dawb mus rau dawb

Txoj kev tsim khoom ntawm Lambda Cyhalotric Acid

Txoj kev npaj yog muab cov metered sodium hydroxide tov thiab hnyav rau hauv cov tshuaj tiv thaiv kettle, pib stirring, muab cis -3-(2,2-dichloro -3,3,{5} }trifluoropropanyl)-2,2-dimethylcyclopropanecarboxylate methyl ester, ua kom sov txog qhov kub thiab txias kom txog thaum cov tshuaj tiv thaiv tiav, nws yuav siv li 6 teev, rov qab cov kuab tshuaj, ntxiv hydrochloric acid los kho pH, txav mus rau hauv cov dej sib cais los qhia cov pa roj carbon dioxide, cov khoom dawb maj mam precipitated los ntawm cov tshuaj, kom txog rau thaum nag lossis daus tiav thiab tom qab ntawd lim kom tau cov hmoov dawb dawb Z-cis chlorofluorochrysanthemum acid (tseem hu ua kungfu acid).

Kev ceev faj rau kev nyab xeeb

Tsis txhob kov cov tawv nqaij, qhov muag, thiab khaub ncaws ntawm tus kheej. Ntxuav tes kom huv si tom qab tuav. Tsis txhob ua pa pa. Tsuas yog siv qhov cua kom txaus.
Hnav cov khaub ncaws tiv thaiv, hnab looj tes, thiab tiv thaiv qhov muag / ntsej muag.
Khaws deb ntawm qhov chaw ntawm qhov hluav taws kub. Minimize hmoov av tsim thiab tsub zuj zuj.
Khaws lub thawv kaw kom nruj. Qhib thiab tuav lub thawv nrog kev saib xyuas.
Tsis txhob noj, haus, lossis haus luam yeeb thaum tuav.

Cytidine 5-Monophosphate yog dab tsi?

Cytidine 5'-monophosphate yog pyrimidine ribonucleoside 5'-monophosphate muaj cytosine li nucleobase. Nws muaj lub luag haujlwm ua tib neeg metabolite, Escherichia coli metabolite thiab nas metabolite. Nws yog pyrimidine ribonucleoside 5'-monophosphate thiab cytidine 5'-phosphate. Nws yog conjugate acid ntawm cytidine 5'-monophosphate (2-).

Cov khoom ntawm Cytidine 5-Monophosphate

Organic Source	Synthetic
CAS	63-37-6
Tshuaj Formula	C9H14N3O8P
Purity	Ntau dua lossis sib npaug li 99%
Daim ntawv	Hmoov
Qhov tshwm sim	Dawb crystalline hmoov
Cia Temp.	2-8 degree
Solubility	Dej (me ntsis, rhaub)

Kev tuav ntawm Cytidine 5-Monophosphate

Txawm li cas los xij, koj yuav tsum npaj thiab siv cov kev daws teeb meem rau tib hnub. Txawm li cas los xij, yog tias koj xav tau los tsim cov kev daws teeb meem ua ntej, peb xav kom koj khaws cov tshuaj raws li aliquots hauv cov vials kaw ntom ntom ntawm -20 degree . Feem ntau, cov no yuav siv tau txog li ib hlis. Ua ntej siv, thiab ua ntej qhib lub vial peb xav kom koj tso cai rau koj cov khoom kom sib npaug hauv chav sov li 1 teev.

Txheej txheem ntau lawm

Txoj kev tsim Cytidine 5'-monophosphate disodium ntsev muaj cov hauv qab no:

Cytosine, phosphoric acid peb ethyl ester thiab pyridine tau ntxiv rau hauv cov hlab ntsha. Tom qab sib tov, cov tshuaj tiv thaiv kub yog -15-5 C, thiab qee qhov ntawm peb phosphorus oxychloride tau ntxiv maj mam ntawm qhov kub no. Tom qab nplawm, cov tshuaj tiv thaiv txuas ntxiv mus rau 10-30h.
Cov qauv no tau txheeb xyuas los ntawm HPLC. Thaum qhov kev hloov pauv ntau dua 99%, 10-15% dej ntsev ntsev tau ntxiv rau hydrolysis. Lub hydrolysis kub tau tswj ntawm 0-5degrees thiab lub sij hawm hydrolysis yog 10-20h;
Tom qab qhov kawg ntawm hydrolysis, cov dej txheej tau txais los ntawm kev sawv thiab txheej txheej kom tshem tawm cov organic theem;
Kho pH 7.
Cov khoom nyoos tau yaj, decolorized nrog cov pa roj carbon activated, thiab tom qab ntawd 95% cawv ob zaug ntawm cov tshuaj tau ntxiv rau precipitate crystals. Cov khoom tiav, Cytidine 5'-monophosphate disodium ntsev, tau txais los ntawm kev pom, yaug thiab ziab.

Kev siv Cytidine 5-Monophosphate

Cov nucleoside diphosphates cytidine diphosphate (CDP) thiab uridine diphosphate (UDP) yog qhov tseem ceeb rau pyrimidine synthesis Cytidine 5′-monophosphate (CMP) nucleotide yog pab tau rau hauv adsorption kev tshawb fawb ntawm biomimetic apatite rau mimicking pob txha pob zeb. Nws kuj ua hauj lwm pab tiv thaiv kab mob ntxiv hauv cov qauv menyuam yaus.

Cytidine 5′-monophosphate (CMP) yog siv los ua ib qho substrate ntawm uridine monophosphate (UMP) / cytidine monophosphate (CMP) kinase (EC 2.7.4.4) los tsim CDP uas thaum phosphorylation rau CTP txhawb nqa DNA thiab RNA biosynthesis.

Cov ntawv pov thawj

Peb cov khoom tau dhau ISO 9001, HACCP, FSSC22000, SC thiab CFDA, Korean FDA, EU GMP thiab lwm cov ntawv pov thawj kev tswj xyuas zoo.

Peb lub Hoobkas

Shanghai Exquisite Biochemical Co., Ltd. tau tsim nyob rau xyoo 2009, peb tshwj xeeb hauv kev tsim khoom thiab muab API thiab tshuaj.

Cov lus nug nquag

Q: Dab tsi yog intermediaries hauv chemistry?

A: Ib qho nruab nrab yog ib hom uas tshwm sim hauv cov txheej txheem ntawm cov tshuaj tiv thaiv, tab sis tsis yog nyob rau hauv tag nrho cov sib npaug sib npaug. Ib qho nruab nrab yog ib txwm tsim nyob rau hauv cov kauj ruam thaum ntxov ntawm lub mechanism thiab noj nyob rau hauv ib tug tom qab kauj ruam.

Q: Dab tsi yog intermediates hauv biology?

A: Ib qho nruab nrab lossis cov tshuaj tiv thaiv nruab nrab yog ib yam khoom tsim thaum lub sij hawm nruab nrab ntawm cov tshuaj tiv thaiv ntawm cov reactants thiab cov khoom xav tau.

Q: Dab tsi yog hom intermediates?

A: Carbanions. Hauv cov organic chemistry, carbanion, hu ua carbonium ion hauv qee cov ntawv, yog cov tshuaj tiv thaiv nruab nrab uas muaj ib qho tsis zoo nyob rau ntawm cov pa roj carbon atom.
Dawb radicals. Lwm chav kawm ntawm cov tshuaj tiv thaiv intermediates yog cov dawb radicals.
Carbocations.

Q: Dab tsi yog 4 hom reactive intermediates?

A: Reactive intermediates raws li carbon yog radicals, carbenes, carbocations, carbanions, arynes, thiab carbynes.

Q: Koj yuav txheeb xyuas cov neeg nruab nrab hauv chemistry li cas?

A: Qhov nruab nrab yog hom uas tau tsim thawj zaug thiab tom qab ntawd noj. Saib ntawm, peb tuaj yeem pom tias nws tau noj hauv thawj theem theem, thiab tom qab ntawd ua rau hauv theem thib ob elemental.

Q: Dab tsi yog qhov nruab nrab ntawm cov organic chemistry?

A: Illustrated Glossary of Organic Chemistry - Intermediate. Intermediate: Nyob rau hauv cov tshuaj tiv thaiv los yog cov txheej txheem, txhua hom reacting uas tsis tau pib cov khoom lossis reactant, thiab tseem tsis tau dhau los ua cov khoom, thiab uas tsis yog lub xeev hloov.

Q: Dab tsi yog radical intermediate?

A: Radicals yog nruab nrab hauv ntau cov tshuaj tiv thaiv, ntau dua li pom tseeb los ntawm qhov sib npaug sib npaug. Radicals tseem ceeb hauv combustion, atmospheric chemistry, polymerization, plasma chemistry, biochemistry, thiab ntau lwm yam tshuaj.

Q: Puas yog tag nrho cov tshuaj tiv thaiv muaj qhov nruab nrab?

A: Nws kuj tseem ceeb heev uas yuav tsum nco ntsoov tias qhov tshuaj tiv thaiv tsis tas yuav muaj qhov nruab nrab! Koj tuaj yeem muaj lossis tsis muaj nyob ntawm qhov xwm txheej thiab cov txheej txheem ntawm cov tshuaj tiv thaiv. Muaj ntau cov lus teb ib kauj ruam uas tsis muaj qhov nruab nrab txhua.

Q: Dab tsi yog qhov txawv ntawm ib qho catalyst thiab qhov nruab nrab?

A: Cov ntsiab lus catalyst thiab nruab nrab yog qhov tseem ceeb heev hauv cov tshuaj tiv thaiv. Lub catalyst yog ib qho kev sib xyaw ua ke uas ua rau nce tus nqi ntawm cov tshuaj tiv thaiv yam tsis tau noj nws tus kheej, thaum lub sij hawm nruab nrab yog ib qho molecule tsim los ntawm ob los yog ntau dua reactants thiab ntxiv reacted los muab cov khoom kawg.

Q: Qhov txawv nruab nrab thiab catalyst yog dab tsi?

A: Ib qho catalyst yog siv thaum pib ntawm cov tshuaj tiv thaiv thiab rov tsim dua thaum kawg. Ib qho nruab nrab yog tsim thaum lub sij hawm cov tshuaj tiv thaiv tab sis tsis muaj nyob rau thaum kawg.

Q: Dab tsi yog qhov tseem ceeb ntawm nruab nrab hauv chemistry?

A: Nyob rau hauv chemistry, ib tug reactive intermediate los yog ib tug intermediate yog ib tug luv luv-nyob, high-zog, heev reactive molecule. Thaum tsim nyob rau hauv cov tshuaj tiv thaiv, nws yuav sai sai hloov mus rau hauv ib tug ruaj khov molecule. Tsuas yog nyob rau hauv cov xwm txheej tshwj xeeb no tuaj yeem raug cais tawm thiab khaws cia, xws li qhov kub thiab txias, matrix cais tawm.

Q: Dab tsi yog qhov txawv ntawm qhov nruab nrab thiab lub tshuab ua kom muaj zog?

A: Cov neeg nruab nrab yog tsim nyob rau hauv ib kauj ruam ntawm cov tshuaj tiv thaiv thiab ruaj khov kom txog thaum lawv tau noj los ntawm cov kauj ruam tom ntej ntawm cov tshuaj tiv thaiv. Yog li ntawd, lawv muaj kev sib raug zoo li qub. Activated complexes muaj ib nrab daim ntawv cog lus raws li lawv yog cov tshwm sim ntawm reactant particles tawg / tsim daim ntawv cog lus.

Q: Puas yog dawb radicals intermediates?

A: Dawb radicals yog cov tshuaj tiv thaiv nruab nrab uas tsim los ntawm homolytic cleavage ntawm covalent daim ntawv cog lus uas muaj cov pa roj carbon uas tau txais cov hluav taws xob tsis sib xws. Nyob rau hauv cov txheej txheem no txhua lub atom tshem tawm ib qho ntawm ob lub electrons tsim ib daim ntawv cog lus ib leeg. Nws yuav tsim ob hom tshiab uas muaj cov hluav taws xob tsis sib xws.

Q: Puas tuaj yeem hloov kho radical intermediates?

A: Radical rearrangements muaj tsawg dua li cation rearrangements, tab sis koj yuav tsum paub txog qhov ua tau. Nyob rau hauv radical rearrangements, cov migrating pawg yog cov uas haum electrons nyob rau hauv ib tug π system (vinyl, aryl, carbonyl, ...), los yog atoms uas yuav nthuav lawv valence plhaub.

Q: Puas muaj ob tus neeg nruab nrab?

A: Intermediates yog cov molecules lossis cov ntsiab lus uas pom nyob rau ntawm cov khoom ntawm ib kauj ruam tab sis kuj nyob rau hauv reactant ntawm lwm kauj ruam. Nyob rau hauv rooj plaub no peb muaj ob intermediates NO2 thiab F. Tus nqi sib npaug yog muab los ntawm cov kauj ruam qeeb tshaj ntawm cov tshuaj tiv thaiv.

Q: Ib qho nruab nrab puas tuaj yeem ua tus reactant?

A: Ib qho nruab nrab yog cov khoom tsim nyob rau hauv ib kauj ruam, tab sis tom qab ntawd tau noj nyob rau hauv ib kauj ruam tom ntej raws li reactant. Nyob rau hauv tag nrho cov kab zauv, nws tsis yog ib tug reactant los yog ib yam khoom thiab tsis muaj nyob txij li thaum nws tau noj tom qab nws yog tsim.

Q: Vim li cas cov intermediates tsis ruaj khov thiab muaj zog?

A: Reactive intermediates muaj ntau yam zoo sib xws: qis concentration nrog rau cov tshuaj tiv thaiv substrate thiab cov khoom siv tshuaj tiv thaiv zaum kawg. nrog rau kev zam ntawm carbanions, cov intermediates no tsis ua raws li txoj cai lewis octet, li no lub siab reactivity. feem ntau generated ntawm chemical decomposition ntawm ib tug chemical compound.

Q: Puas yog intermediates ib txwm muaj zog dua?

A: Ib qho nruab nrab yuav tsum tsis yog hom hluav taws xob qis tshaj plaws, suav nrog cov khoom siv hluav taws xob thiab cov khoom siv, tab sis tuaj yeem qis dua lossis siab zog dua li cov reactant (tab sis tsawg dua li lub xeev hloov pauv) thiab siab dua cov khoom.

Q: Dab tsi yog qhov cuam tshuam loj heev hauv nruab nrab?

A: Reactive intermediates, nyob rau hauv chemistry, yog heev reactive, siab zog thiab luv luv nyob rau hauv lub molecules uas yuav sai sai tig mus rau hauv ruaj khov molecules thaum lawv yog generated nyob rau hauv cov tshuaj tiv thaiv. Hauv qee kis, lawv raug cais thiab khaws cia. Piv txwv li, kev sib cais matrix thiab qis kub.

Q: Cov catalysts puas tuaj yeem tsim cov intermediates?

A: Catalysts feem ntau hnov mob nrog ib lossis ntau dua reactants los tsim cov intermediates uas tom qab muab cov khoom siv tshuaj tiv thaiv zaum kawg, hauv cov txheej txheem ntawm kev tsim cov catalyst.

Q: Lub hom phiaj ntawm intermediates yog dab tsi?

A: Technically hais lus nyob rau hauv cov ntsiab lus ntawm kev lag luam tshuaj, intermediates yog lawv tus kheej cov khoom ntawm ib tug tshuaj tiv thaiv, tab sis peb xav txog lawv raws li thawj lub tsev thaiv rau pib lwm cov tshuaj tiv thaiv uas yuav yield peb daim ntawv thov zaum kawg.

Raws li ib qho ntawm cov kws tshaj lij intermediates manufacturers hauv Suav teb, peb tau tshwj xeeb los ntawm kev pabcuam zoo thiab xa khoom raws sijhawm. Thov so assured mus yuav cov khoom zoo intermediates ntawm tus nqi sib tw los ntawm peb lub hoobkas.