Formamide (cas {{75-12-7) thiab formaldehyde (yog qhov txawv ntawm cov qauv tshuaj, nws yog qhov sib txawv ntawm ob qho khoom siv kom tsis txhob muaj kev ntxhov siab, yog li cov lus hauv qab no piav qhia Yuav ua li cas cais lawv .
Dab tsi yog formamide (cas 75-12-7)?
FormamidePuas yog qhov yooj yim tshaj plaws kev lom zem ib leeg muaj tshuaj lom neeg ch3no {}}} Kuv muaj cov pob txha mos ntxiv tau tshwm sim, nws puas muaj cov tshuaj tsw qab, nws muaj cov hniav txhais tau tias yog 45} Nws puas muaj cov tshuaj ntsuab . tus Melting taw tes yog tsawg heev (2 txog 3 degree), tab sis lub boiling point yog siab (210 degree) {{11 {}
Formamide kua yog siv los ua cov kuab tshuaj nyob hauv kev tsim cov noob polymers (e {}
Dab tsi yog formaldehyde?
Formaldehydeyog qhov yooj yim aldehyde . nws lub npe tshuaj yej tsis muaj tshuaj tua kab mob yog 30}}} Odor .
Nws yog siv rau kev tsim khoom ntawm cov resins, adhaesives thiab plastics, thiab tseem siv rau kev tsim cov tshuaj tua kab, zas, thiab ntau {0}.
| Ntiag tug | Formamide | Formaldehyde |
|---|---|---|
| Kev tshwm sim | Tsis muaj kob kua ntawm chav tsev kub | Cov roj tsis muaj kob (feem ntau yog siv ua 37% kev daws teeb meem, "formalin") |
| Kub taw tes | 210 degree | -19℃(roj ntawm chav tsev kub); aqueous daws boil ~ 100 degree |
| Melting taw tes | 2.55 degree | -92 degree |
| So | Nchuav nrog dej, ethanol, thiab lwm yam . | Soluble hauv dej, ethanol, ether |
| Qhib tshuab | Tsis muaj volatility (helking point) | Highly volatile (muaj ntxhiab tsw ntxhiab tsw) |
| Lom zem | Kev muaj tshuaj lom (tawv nqaij / qhov muag tsis muaj teeb meem; kev tsim txom yog tias noj / nqus tau) | Muaj kuab heev; carcinogenic; Ua rau mob hnyav, ua pa ua pa, thiab muaj mob cancer |
Cov tib yam distintions ntawm ib nrais muag
- Lub tsev: Amide vs . ALDEHYDE cov pab pawg ua haujlwm rau cov tshuaj sib txawv ntawm .
- Lub Koom Haum Rau Lub Cev: Kua vs . roj (ntawm chav tsev kub), cuam tshuam kov thiab cia.
- Lom zem: Formaldehyde muaj kev piam sij ntxiv, thaum tsim cov carcinogenicity, thaum formamide poses yuav muaj kev pheej hmoo tsawg dua tab sis tseem yuav ceeb toom rau .
- Cov Ntawv Thov: Faulamide pabcuam ua cov kuab tshuaj ntau thiab cov tshuaj tiv thaiv kab
Puas yog koj tab tom tshawb nrhiav qhov zoo, txhim khu kev qha cov khoom siv ntawm cov formamide thiab formaldehyde? Raws li ua ib tus qauv thoob ntiaj teb, peb muaj cov qauv kev ua tau zoo thiab muaj kev nyab xeeb zoo rau koj cov kev siv tshwj xeeb.
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All Txhua cov ntawv sau nrog
Txog Peb
Gneebionyob hauv Henan xeev, Suav teb, peb tau dhau cov ntawv pov thawj zoo, muaj cov cai tswj hwm tus kheej, thiab peb cov khoom tau txais txiaj ntsig zoo los ntawm cov neeg siv khoom.
Raws li kev ua thoob ntiaj teb cov khoom lag luam, peb xa cov ntaub ntawv tso cai siv tshuaj sib txuas ua raws li cov khoom siv thoob ntiaj teb ua kom zoo thiab tsis muaj txiaj ntsig zoo rau kev ua kom zoo thiab yooj yim.
Peb cov khoom muag kub muaj xws li polyisobutylene (pib) thiab dimethyil ether (dme),Styrene, Cyclohexane, ethylene glycole glycole, methyl ketream (mek), isopropyl cawv (IPA), thiab ethylene glycol,Diethylene glycol.
