Thiourea
Txheej Txheem Cej Luam Khoom
Lub Npe Tshuaj: Thiourea
Tus lej CAS: 62-56-6
Cov mis molecular: CH₄N₂S
Qhov Hnyav Molecular: 76.12 g/mol
Tsos: Dawb crystalline hmoov los yog prills; tsis muaj ntxhiab los yog muaj me ntsis tsw zoo li ammonia
Kev yaj: Yaj tau zoo heev hauv dej (137 g/L ntawm 20°C), yaj tau hauv ethanol, yaj me ntsis hauv ether thiab acetone
Thiourea yog ib qho tseem ceeb ntawm cov organic sulfur compound nrog cov qauv zoo li urea (hloov cov pa oxygen nrog sulfur). Nws qhia txog cov tshuaj lom neeg tshwj xeeb, ua rau nws yog cov khoom siv raw thiab cov khoom ntxiv rau ntau yam kev lag luam, kev ua liaj ua teb, thiab kev kuaj mob. Nrog cov khoom siv lub cev ruaj khov thiab kev tswj hwm reactivity, nws ua tau raws li cov qauv zoo rau ntau yam kev siv.
Cov Khoom Tseem Ceeb & Cov Txiaj Ntsig
| Vaj tse | Cov Lus Qhia Tshwj Xeeb | Qhov Zoo Tshaj Plaws |
| Qhov Kub Yaj | 176 - 178°C (yaj kom kub tshaj 180°C) | Kev ruaj khov thermal hauv qhov kub ua haujlwm ib txwm muaj, tiv thaiv kev lwj ua ntej lub sijhawm |
| Tus nqi pH (1% kua dej) | 6.0 - 7.5 | Nruab nrab mus rau me ntsis acidic, sib xws nrog feem ntau cov substrates yam tsis ua rau corrosion lossis pH tsis sib npaug |
| Kev huv (min) | 99.0% (qib kev lag luam); 99.5% (qib tshuaj) | Kev huv siab txo cov khoom tsis huv uas yuav cuam tshuam rau kev ua haujlwm ntawm cov khoom lossis ua rau muaj kev tsis haum tshuaj |
| Cov Hlau Hnyav (max) | 10 ppm (Pb, Cd, Hg tag nrho) | Ua tau raws li cov qauv ib puag ncig thiab kev nyab xeeb, tsim nyog rau kev sib cuag zaub mov lossis kev siv tshuaj |
| Kev Hygroscopicity | Qis (nqus cov dej noo tsawg kawg nkaus ntawm qhov kub thiab txias hauv chav) | Yooj yim rau khaws cia thiab tuav tsis muaj kev sib sau ua ke, ua kom zoo ib yam li qub |
Cov Ntawv Thov Ib Txwm Muaj
Thiourea cov khoom siv tshuaj lom neeg tshwj xeeb (piv txwv li, muaj peev xwm tsim cov khoom sib xyaw nrog cov hlau, ua tus neeg sawv cev txo qis, thiab koom nrog hauv kev sib xyaw ua ke heterocyclic) ua rau nws tsis tseem ceeb hauv ntau yam lag luam:
3.1 Kev Lag Luam thiab Kev Ua Hlau
Kev Kho Hlau & Kev Plating: Siv ua tus neeg sawv cev rau kev sib xyaw hauv kev leaching kub thiab nyiaj (piv txwv li, hauv kev rho tawm kub uas tsis muaj cyanide) los yaj cov hlau muaj nqis ntawm cov ores. Ua haujlwm ua tus neeg ci ntsa iab thiab tus neeg sawv cev rau kev electroplating nickel, tooj liab, thiab zinc, txhim kho kev sib npaug ntawm cov txheej thiab kev ci ntsa iab.
Kev Tiv Thaiv Kev Xeb: Ntxiv rau cov dej txias hauv kev lag luam, cov kua pickling, thiab cov kua hlau ua haujlwm los tsim ib daim zaj duab xis tiv thaiv rau ntawm cov hlau, tiv thaiv kev xeb thiab kua qaub.
3.2 Kev Sib xyaw ua ke ntawm cov tshuaj lom neeg
Tshuaj & Agrochemicals: Ib qho tseem ceeb hauv kev tsim cov sulfonamides (tshuaj tua kab mob), cov tshuaj hormones thyroid, thiab cov tshuaj tua nroj (piv txwv li, cov tshuaj tua nroj uas siv thiourea rau kev tswj cov nroj tsuag hauv cov qoob loo).
Kev Tsim Xim thiab Xim: Siv los ua cov thiazole thiab imidazole derivatives, uas yog cov khoom tseem ceeb ntawm azo dyes thiab organic pigments (piv txwv li, rau textiles, plastics, thiab inks).
Kev Lag Luam Roj Hmab: Ua haujlwm ua tus ua kom nrawm thiab hloov kho vulcanization, txhim kho kev ywj pheej ntawm roj hmab, tiv taus cua sov, thiab tiv taus kev laus hauv cov log tsheb, cov foob, thiab cov khoom roj hmab.
3.3 Kev Siv Hauv Chaw Kuaj Mob & Kev Siv Tshwj Xeeb
Kev Tshuaj Xyuas Txog Tshuaj: Siv ua ib qho tshuaj reagent los nrhiav thiab ntsuas cov hlau hnyav (piv txwv li, 铋, selenium) los ntawm kev tsim cov khoom sib xyaw.
Kev Thaij Duab: Ua haujlwm ua tus neeg sawv cev kho thiab tus neeg sawv cev txo qis hauv kev thaij duab dub thiab dawb, pab kom cov duab ruaj khov thiab tshem tawm cov nyiaj halides uas tsis tau raug tshav ntuj.
Kev Nyab Xeeb & Kev Ua Raws Cai
4.1 Cov Lus Qhia Txog Kev Nyab Xeeb
Kev Siv: Tsis txhob ua pa rau hmoov av lossis kov daim tawv nqaij/qhov muag ncaj qha. Hnav cov tsom iav tiv thaiv hmoov av, hnab looj tes nitrile, thiab lub npog ntsej muag (N95 lossis siab dua) hauv cov chaw uas tsis muaj cua nkag. Ntxuav tes kom huv si nrog xab npum thiab dej tom qab kov.
Kev Khaws Cia: Khaws cia rau hauv qhov chaw txias, qhuav, thiab muaj cua nkag tau zoo kom deb ntawm cov kua qaub muaj zog (piv txwv li, hydrochloric acid), cov tshuaj oxidizing (piv txwv li, hydrogen peroxide), thiab cov nplaim taws qhib. Siv cov HDPE lossis cov thoob fiber uas kaw kom tiv thaiv kev nqus dej noo thiab kev ua qias tuaj.
Kev Pov Tseg: Pov tseg cov khib nyiab lossis cov thiourea uas tsis siv raws li cov cai ib puag ncig hauv zos (piv txwv li, ua cov khib nyiab kev lag luam uas tsis muaj kev phom sij; tsis txhob tso rau hauv av lossis dej).
4.2 Kev Ua Raws Cai
Ua raws li REACH Regulation (EU) (sau npe rau hauv REACH SVHC daim ntawv teev npe, tsis muaj kev txwv rau kev siv hauv kev lag luam).
Ua tau raws li FDA Cov Qauv (rau kev siv rau kev sib cuag nrog zaub mov, piv txwv li, ua cov tshuaj tiv thaiv xeb hauv cov khoom siv ua zaub mov).
Ua raws li USP/NF Cov Qauv (qib tshuaj) rau kev siv rau hauv kev tsim tshuaj.
Tau ntawv pov thawj los ntawm ISO 9001 (kev tswj xyuas zoo) thiab ISO 14001 (kev tswj hwm ib puag ncig) rau cov txheej txheem tsim khoom.
Cov Ntaub Ntawv Txog Kev Siv Tshuab (TDS) Cov Ntsiab Lus Tseem Ceeb
| Cov Qauv | Qib Kev Lag Luam | Qib Tshuaj | Txoj Kev Ntsuas |
| Kev dawb huv | ≥99.0% | ≥99.5% | Kev Ua Haujlwm Siab - Kev Ua Kua Chromatography (HPLC) |
| Cov ntsiab lus noo noo | ≤0.5% | ≤0.3% | Kev Ntsuas Karl Fischer |
| Cov ntsiab lus tshauv | ≤0.1% | ≤0.05% | Kev Tshuaj Xyuas Gravimetric |
| Hlau (Fe) | ≤5 ppm | ≤2 ppm | Kev Ntsuas Atomic Absorption Spectroscopy (AAS) |
| Cov Khoom Uas Tsis Yaj Hauv Dej | ≤0.01% | ≤0.005% | Kev Lim thiab Kev Ziab |
Vim li cas ho xaiv peb lub Thiourea?
Cov Qib Tshwj Xeeb: Peb muab cov qib kev lag luam, tshuaj, thiab chav kuaj kom tau raws li cov kev xav tau tshwj xeeb ntawm cov neeg siv khoom (piv txwv li, cov hlau hnyav tsawg rau kev siv tshuaj).
Kev Muab Khoom Ruaj Khov: Peb cov chaw tsim khoom (nrog rau lub peev xwm txhua xyoo ntawm 5,000 tons) ua kom xa khoom raws sijhawm, txawm tias yog kev txiav txim ntau (20-500 kg nruas).
Kev Txhawb Nqa: Peb pab neeg kws tshuaj muab kev sab laj ua ntej muag (piv txwv li, kev sib phim daim ntawv thov) thiab kev txhawb nqa tom qab muag (piv txwv li, kev daws teeb meem rau cov teeb meem ua tiav).
Kev Tsim Khoom Uas Zoo Rau Ib Puag Ncig: Peb cov txheej txheem tsim khoom txo cov dej khib nyiab thiab cov pa phem, ua raws li lub hom phiaj thoob ntiaj teb kev ruaj khov.
Tiv Tauj Peb
Yog xav paub tus nqi, cov qauv, lossis cov ntaub ntawv TDS/COA tag nrho, hu rau peb pab neeg muag khoom:
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