Cov khoom lag luam
Khoom npe: Coumarin
CAS: 91-64-5
Mf: c9h6o2
MW: 146.14
Einecs: 202-086-7
Ntws: 0.935 g / cm3
Melting Taw tes: 68-73 Qib
BLAIL NTAM: 298 degree
Ntim: 25 kg / thawv, 25 kg / nruas
Solubility: insoluble hauv dej txias, soluble hauv dej kub, ethanol, ether, chloroform.
Kev qhia tshwj xeeb
| Cov khoom | Kev qhia tshwj xeeb |
|
Kev tshwm sim |
Cov Crystal Dawb |
|
Kev coj dawb huv |
Ntau dua los yog sib npaug rau 99% |
|
Ywg dej |
Tsawg dua los yog sib npaug rau 0.2% |
| Cov hlau hnyav (raws li pb) | Tsawg dua los yog sib npaug rau 0.1% |
Daim ntawv thov
Coumarin yog ib qho tseem ceeb organic compound dav siv nyob rau hauv ntau daim teb, suav nrog:
Cov txuj lom thiab fragce Enhancers:
Coumarin yog ib qho tseem ceeb fix, uas feem ntau siv nyob rau hauv cov ntsiab lus xws li cov tshuaj tsw qab, cov ntaub haus luam yeeb, cov khoom siv luam yeeb, cov khoom siv yas thiab roj hmab ua cov tsw ntxiv.
Kws Tshuaj Teb:
Coumarin thiab nws cov derivatives muaj ntau yam kev lom neeg xws li anticoagulant, anti {{o {o {o {o {
Lwm Yam Kev Siv:
Nyob rau hauv kev lag luam electroplating, coumarin tuaj yeem siv ua kev ntxiv los txo cov txheej corosity thiab txhim kho qhov ci. Tsis tas li ntawd, nws cov derivatives kuj siv hauv kev tsim cov dyes, ntsuas kev tsom xam cov tshuaj reagents thiab kev ua liaj ua teb.
Chaw ntim khoom
Lub Warehouse yog cua thiab qhuav ntawm qhov kub tsis qhuav.
Ntim
Kev Thauj Mus Los & Kev Them Nyiaj
Hais Txog Tsheb Thauj Mus Los
* Peb tuaj yeem muab ntau hom thauj raws li cov neeg siv khoom 'xav tau.
*Thaum qhov ntau me me, peb tuaj yeem xa khoom los ntawm huab cua lossis thoob ntiaj teb, ua kom muaj kev pab pawg ua haujlwm tshwj xeeb thiab ntau yam kev thoob ntiaj teb.
* Thaum qhov ntau yog loj, peb tuaj yeem xa nkoj los ntawm hiav txwv los xaiv chaw nres nkoj.
* Dhau li, peb kuj tuaj yeem muab cov kev pabcuam tshwj xeeb raws li cov neeg siv khoom siv 'kev xav tau thiab cov khoom lag luam.
*Peb tuaj yeem muab ntau txoj kev them nyiaj rau cov neeg siv khoom xaiv.
*Thaum tus nqi me me, cov neeg yuav khoom feem ntau them nyiaj los ntawm Paypal, Western Union, Alibaba, thiab lwm yam.
* Thaum tus nqi loj, cov neeg yuav khoom feem ntau them nyiaj los ntawm T / T, L / C thaum pom, Alibaba, thiab lwm yam.
* Dhau li, ntau thiab ntau tus neeg yuav khoom yuav siv cov neeg siv khoom ib ntus lossis weChat them nyiaj kom them nyiaj.
Cov FAQ
1
Kuv puas tuaj yeem tau txais ib qho qauv ntawm koj?
Re: yog, yog lawm, peb yuav nyiam coj mus kuaj rau koj raws li koj xav tau.
2
Koj MOQ yog dab tsi?
Re: Fajkhaum Yog Leej Twg?
3
Ntev npaum li cas kuv tuaj yeem tau txais kuv cov khoom tom qab them nyiaj?
Re: Yog tias yuav muaj li cas los ntawm cov neeg ua haujlwm lossis cov huab cua, nws feem ntau yog tus nqi 5-10 hnub.
Yog tias xa los ntawm hiav txwv, nws feem ntau raug nqi 3-40 hnub, uas nyob ntawm koj lub hom phiaj.
4
Koj puas muaj ib qho tom qab {{0} kev pabcuam muag khoom?
Re: Yog lawm
Tiv Tauj Peb
Cim npe nrov: Coumarin Cas 91-64-5, Tuam Tshoj Coumamarin Cas 91-64-5 Cov Chaw Tsim Khoom, Chaw Tsim Tshuaj, Hoobkas
