Cov khoom
1,3-Dimethylurea hmoov
Dimethylurea Chemical Properties
| Melting point | 101-104 ° C (lit.) |
| Boiling point | 268-270 ° C (lit.) |
| ceev | 1.142 ib |
| vapor siab | 6 hPa (115 ° C) |
| Refractive Index | 1.4715 (kwv yees) |
| Fp | 157 ° C |
| cia temp. | Khaws hauv qab +30 ° C. |
| solubility | H2O: 0.1 g / mL, ntshiab, tsis muaj xim |
| pka ua | 14.57 ± 0.46 (Kev kwv yees) |
| daim ntawv | Crystals |
| xim | Dawb |
| PH | 9.0-9.5 (100g / l, H2O, 20 ℃) |
| Dej Solubility | 765 g / L (21.5 ºC) |
| BRN | 1740672 ib |
| InChIKey | MGJKQDOBUOMPEZ-UHFFFAOYSA-N |
| LogP | -0.783 ntawm 25 ℃ |
| CAS DataBase Reference | 96-31-1 (CAS DataBase Reference) |
| NIST Chemistry Reference | Urea, N, N'-dimethyl-(96-31-1) |
| EPA Tshuaj Registry System | 1,3-Dimethylurea (96-31-1) |
Cov ntaub ntawv kev nyab xeeb
| Risk Statements | 62-63-68 |
| Cov lus hais txog kev nyab xeeb | 22-24/25 ib |
| WGK Germany | 1 |
| RTECS | YS9868000 |
| F | 10-21 |
| Autoignition Kub | 400 ° C |
| TSCA | Yog lawm |
| HS Code | 29241900 ib |
| Cov Ntaub Ntawv Muaj Xwm Ceev | 96-31-1 (Cov Ntaub Ntawv Tshuaj Tiv Thaiv) |
| Toxicity | LD50 qhov ncauj hauv Luav: 4000 mg / kg |
Kev siv Dimethylurea thiab Synthesis
| Kev piav qhia | 1, 3-Dimethylurea yog urea derivative thiab siv los ua ib qho nruab nrab hauv cov organic synthesis.Nws yog xim tsis muaj xim crystalline hmoov nrog me ntsis toxicity.Nws kuj yog siv rau synthesis ntawm caffeine, tshuaj, textile aids, herbicides thiab lwm yam.Hauv kev lag luam kev lag luam textile 1,3-dimethylurea yog siv los ua nruab nrab rau kev tsim cov formaldehyde-dawb yooj yim-tu cov neeg ua haujlwm tiav rau textiles.Nyob rau hauv Swiss Product Register muaj 38 yam khoom uas muaj 1,3-dimethylurea, ntawm lawv 17 cov khoom npaj rau cov neeg siv khoom.Cov khoom siv xws li cov xim pleev xim thiab cov tshuaj ntxuav.Cov ntsiab lus ntawm 1,3-dimethylurea hauv cov neeg siv khoom yog nce txog 10% (Swiss Product Register, 2003).Kev siv tshuaj pleev ib ce tau raug thov, tab sis tsis muaj ntaub ntawv qhia txog nws qhov kev siv tiag tiag hauv cov ntawv thov no. |
| Chemical Properties | siv lead ua dawb |
| Siv | N,N'- Dimethylurea tuaj yeem siv tau:
|
| Txhais | ChEBI: Ib tug tswv cuab ntawm chav kawm ntawm ureas uas yog urea hloov los ntawm methyl pawg ntawm txoj hauj lwm 1 thiab 3. |
| Kev piav qhia dav dav | Cov xim tsis muaj kob. |
| Cua & Dej Reactions | Dej soluble. |
| Reactivity Profile | 1,3-Dimethylurea yog ib qho amide.Amides / imides teb nrog azo thiab diazo tebchaw los tsim cov pa phem.Flammable gases yog tsim los ntawm cov tshuaj tiv thaiv ntawm cov organic amides / imides nrog cov muaj zog txo cov neeg ua haujlwm.Amides yog lub hauv paus tsis muaj zog heev (tsis muaj zog dua li dej).Imides tsis tshua muaj txiaj ntsig thiab qhov tseeb tshwm sim nrog cov hauv paus muaj zog los tsim cov ntsev.Ntawd yog, lawv tuaj yeem ua raws li cov kua qaub.Kev sib xyaw amides nrog cov dej ua kom lub cev qhuav dej xws li P2O5 lossis SOCl2 tsim cov nitrile sib xws.Lub combustion ntawm cov tebchaw no generates sib xyaw oxides ntawm nitrogen (NOx). |
| Health Hazard | TXOJ CAI / HLOOV TSHIAB: Thaum rhuab mus rau decomposition 1,3-Dimethylurea emits fumes lom. |
| Hluav Taws Xob | Flash point cov ntaub ntawv rau 1,3-Dimethylurea tsis muaj;1,3-Dimethylurea yog tej zaum combustible. |
| Kev ruaj ntseg Profile | Muaj tshuaj lom los ntawm txoj kev intraperitoneal.Kev sim tshuaj teratogenic thiab kev ua me nyuam.Human mutation data qhia.Thaum rhuab mus rau decomposition nws emits cov pa phem ntawm NOx |
| Txoj kev Purification | Crystallize urea los ntawm acetone / diethyl ether los ntawm kev txias hauv da dej khov.Kuj crystallize nws los ntawm EtOH thiab qhuav nws ntawm 50o / 5mm rau 24hours [Bloemendahl & Somsen J Am Chem Soc 107 3426 1985].[Beilstein 4 IV 207.] |
Sau koj cov lus ntawm no thiab xa tuaj rau peb
