Sodium hydride CAS 7646-69-7
Kev piav qhia txog khoom
Lub Npe Khoom: Sodium hydride
CAS:7646-69-7
MF: NaH
MW:24
EINECS:231-587-3
Melting point: 800 ° C (dec.) (lit.)
qhov ceev: 1.2
Kev khaws cia kub: Khaws cia rau hauv qab +30 ° C.
Kev yaj: Yaj hauv cov sodium molten. Insoluble hauv ammonia, benzene, carbon tetrachloride, carbon disulfide thiab txhua yam organic solvents.
Xim: Dawb rau grey daj ntseg.
Cov Khoom Siv
Sodium hydride yog cov khoom siv ionic, cov ntsev sib xyaw uas cov hydrogen yog cov ions monovalent tsis zoo. Thaum cua sov, nws tsis ruaj khov, lwj yam tsis yaj, thiab sodium hydride sib xyaw nrog dej los npaj sodium hydroxide thiab hydrogen.
Cov sodium hydride ntshiab yog cov siv lead ua zoo li koob nyiaj, cov khoom lag luam sodium hydride feem ntau yog cov hmoov crystalline grey me me, qhov feem pua ntawm sodium hydride yog 25% txog 50% dispersed hauv roj. Qhov ceev sib piv yog 0.92. Sodium hydride yog cov qauv ntsev pob zeb crystalline (lattice tas li a = 0.488nm), thiab raws li lithium hydride hauv ionic crystalline, hydrogen ion muaj nyob rau hauv daim ntawv anion. Kub ntawm kev tsim yog 69.5kJ · mol-1, ntawm qhov kub siab ntawm 800 ℃, nws decomposes rau hauv cov hlau sodium thiab hydrogen; decomposes explosively hauv dej; reacts violently nrog cov cawv qis dua; yaj hauv molten sodium thiab molten sodium hydroxide; insoluble hauv kua ammonia, benzene, carbon tetrachloride thiab carbon disulfide.
Khoom tawv xim grey. Cov sodium hydride ntshiab tsim cov siv lead ua cubic tsis muaj xim; txawm li cas los xij, cov khoom lag luam muaj cov sodium hlau me me, ua rau nws muaj xim grey sib dua. Ntawm qhov siab ntawm huab cua, sodium hydride maj mam hloov pauv hydrogen saum 300 ℃. Ntawm 420 ℃ kev lwj sai tab sis tsis yaj. Sodium hydride yog ntsev thiab yog li ntawd tsis yaj hauv cov kuab tshuaj inert organic. Nws yaj hauv sodium hydroxide uas yaj, hauv sodium - potassium alloys thiab hauv cov khoom sib xyaw eutectic LiCl - KCl uas yaj (352 ℃). Sodium hydride ruaj khov hauv huab cua qhuav tab sis kub hnyiab saum 230 ℃, hlawv kom tsim sodium oxide. Nws raug hydrolyzed sai hauv huab cua noo thiab ua hmoov qhuav nws yog qhov yooj yim hlawv. Sodium hydride reacts nrog dej heev, qhov kub ntawm hydrolysis txaus los hlawv cov hydrogen uas tau tso tawm. Nws reacts nrog carbon dioxide los tsim sodium formate.
Daim Ntawv Thov
Sodium hydride siv tau rau kev sib xyaw ua ke thiab alkylation reaction thiab siv tau ua cov tshuaj polymerization catalyst, siv rau kev tsim cov tshuaj synthetic thiab siv rau hauv kev lag luam tshuaj tsw qab, siv rau kev tsim cov boron hydrides, siv ua cov hlau xeb, txo cov neeg sawv cev, cov neeg sawv cev condensing, desiccant thiab Clay Johnson cov tshuaj reagents.
Siv ua tus neeg sawv cev condensing, tus neeg sawv cev alkylating thiab tus neeg sawv cev txo qis, thiab lwm yam. Nws yog ib qho tseem ceeb reductant rau Pharmaceutical, perfumes, dyes, tab sis kuj yog tus neeg sawv cev ziab, tus neeg sawv cev alkylating, thiab lwm yam.
Ntawm qhov kub qis uas txo cov khoom ntawm sodium tsis xav tau xws li hauv cov ketones thiab aldehydes nrog cov kua qaub esters; hauv cov tshuaj nrog molten sodium hydroxide rau kev txo cov oxide nplai ntawm cov hlau; ntawm qhov kub siab ua tus neeg sawv cev txo qis thiab txo cov catalyst.
Sodium hydride yog siv los txhim kho cov tshuaj tiv thaiv condensation ntawm cov carbonyl compounds los ntawm Dieckmann condensation, Stobbe condensation, Darzens condensation thiab Claisen condensation. Nws ua haujlwm ua tus neeg sawv cev txo qis siv los npaj diborane los ntawm boron trifluoride. Nws kuj tseem siv rau hauv cov tsheb roj cell. Ntxiv mus, nws yog siv los ziab qee cov organic solvents. Ntxiv rau qhov no, nws koom nrog hauv kev npaj cov sulfur ylides, uas yog siv rau kev hloov pauv ntawm ketones mus rau hauv epoxides.
Ntim Khoom & Khaws Cia
Ntim: 100g / thawv; 500g / thawv; 1kg ib lub thawv; 20kg ib lub nruas hlau
Kev Khaws Cia: Nws tuaj yeem khaws cia rau hauv cov kaus poom hlau nrog lub hau sab nraud rau kev tiv thaiv, lossis hauv cov thoob hlau kom tiv thaiv kev puas tsuaj. Khaws cia rau hauv qhov chaw sib cais, txias, qhuav thiab muaj cua nkag zoo, thiab tiv thaiv kom tsis txhob muaj dej noo. Cov tsev yuav tsum muaj cua nkag zoo thiab tsis muaj roj sib sau ua ke.
Cov ntaub ntawv txog kev thauj mus los
Tus lej UN: 1427
Chav Kawm Txaus Ntshai: 4.3
Pawg Ntim Khoom: Kuv
Tus lej HS: 28500090
Cov Lus Qhia Tshwj Xeeb
| Lub npe khoom | Sodium hydride | |
| CAS Nr. | 7646-69-7 | |
| Cov khoom | Tus Qauv | Cov txiaj ntsig |
| Qhov tsos | Cov khoom me me xim grey nyiaj | Ua raws li |
| Kev Ntsuas | ≥60% | Ua raws li |
| Tus nqi hydrogen nquag | ≥96% | Ua raws li |
| Xaus lus | Ua raws li Tus Txheej Txheem Lag Luam | |
