Shaanxi BLOOM Tech Co., Ltd. yog ib tug ntawm cov uas paub txog manufacturers thiab lwm tus neeg ntawm lithium txhuas hydride hmoov cas 16853-85-3 nyob rau hauv Suav teb. Txais tos rau cov lag luam wholesale bulk zoo lithium aluminium hydride hmoov cas 16853-85-3 muag ntawm no los ntawm peb lub hoobkas. Kev pabcuam zoo thiab tus nqi tsim nyog muaj.
Lithium aluminium hydride hmoovyog ib qho inorganic compound nrog cov tshuaj formula ntawm LiAlH4, CAS 16853-85-3. Nws yog dawb crystalline hmoov, insoluble nyob rau hauv hydrocarbons, soluble nyob rau hauv ether, tetrahydrofuran, soluble nyob rau hauv tetrahydrofuran, ether thiab dimethyl hnyav, me ntsis soluble nyob rau hauv dibutyl ether, thiab yuav luag insoluble nyob rau hauv dioxane thiab hydrocarbon tebchaw. Lithum aluminm hydride yog ruaj khov nyob rau hauv cov huab cua qhuav, thiab hnyav hydrolyzes nyob rau hauv cov huab cua ntub, tso ib tug loj npaum li cas ntawm H2 thiab hlawv. Nws tuaj yeem txo ketones, aldehydes, acids, esters, anhydrides, quinones, thiab lwm yam rau cawv, halogenated hydrocarbons rau hydrocarbons, thiab nitriles rau thawj amines.
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Peb tuaj yeem nkoj hauv qab lub npe tiag tiag! Lithium Aluminum Hydride CAS 16853-85-3 PIB: 2850009090
Kev piav qhia rau lub npe tiag tiag shipping: |
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Lithum aluminm hydride yog dav siv nyob rau hauv cov tshuaj, tshuaj tua kab, txuj lom, dyes thiab lwm yam lag luam vim nws zoo heev reducibility, thiab yog siv raws li ib tug txo tus neeg sawv cev nyob rau hauv lwm cov organic synthesis. Nyob rau tib lub sijhawm, lithum aluminm hydride yuav tso tawm ntau lub zog thaum kub hnyiab, thiab nws kuj yog siv los ua ib qho ntxiv rau cov cuaj luaj thiab tua tsheb.
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Tshuaj Formula |
AlH4 Li |
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Exact Mass |
38 |
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Molecular Luj |
38 |
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m/z |
38 (100.0%), 37 (8.2%) |
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Elemental Analysis |
Al, 71,09; H, 10.62; Li, 18.29 Nws |
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Lithium aluminium hydride hmoov(LiAlH₄), raws li ib tug dawb mus rau daj ntseg daj crystalline hmoov, qhia irreplaceable tus nqi nyob rau hauv organic synthesis, tshiab zog cov ntaub ntawv, tshuaj, aerospace, nuclear kev lag luam thiab lwm yam teb vim nws muaj zog reducibility thiab tshwj xeeb tshuaj. Tsab ntawv xov xwm no yuav pib los ntawm nws cov ntawv thov tseem ceeb, sib koom ua ke kev ua lag luam thiab kev txiav - ntug kev tshawb nrhiav, thiab txheeb xyuas cov txheej txheem sib txawv ntawm lithum aluminium hydride.
Lub 'universal txo tus neeg sawv cev' hauv thaj chaw ntawm cov organic synthesis
Lithum aluminium hydride yog ib qho tseem ceeb tshaj plaws txo cov neeg ua hauj lwm hauv cov organic chemistry, nrog lub peev xwm txo qis tshaj qhov zoo sib xws reagents xws li sodium borohydride. Nws tuaj yeem txo ntau yam pa oxygen-muaj thiab nitrogen-muaj cov pab pawg ua haujlwm
1. Txo cov carbonyl compounds
Lithum aluminium hydride tuaj yeem txo aldehydes thiab ketones rau thawj thiab theem nrab cawv nyob rau hauv cov tshuaj tiv thaiv me me (tuaj yeem nqa tawm ntawm chav tsev kub), nrog cov txiaj ntsig ntau dua 90%. Piv txwv li, nyob rau hauv tus txheej txheem ntawm synthesizing cov tshuaj antidepressant fluoxetine, lithum aluminium hydride tuaj yeem txo cov ketones nruab nrab ntawm cov cawv, muab cov pab pawg ua haujlwm rau cov kauj ruam tom ntej.
2. Kev txo qis ntawm esters thiab amides
Cov tshuaj txo cov tshuaj yog qhov nyuaj los txo cov esters rau cov cawv, thaum lithum aluminium hydride tuaj yeem kov yeej qhov kev txwv no los ntawm kev hloov pauv cov ester ncaj qha rau thawj cov cawv. Thaum synthesizing analgesic ibuprofen, lithum aluminium hydride yog siv los txo cov ester pawg, ua kom yooj yim rau kev sib txuas, thiab txhim kho cov txiaj ntsig. Tsis tas li ntawd, nws tseem tuaj yeem txo cov amides rau amines, muab cov cuab yeej tseem ceeb rau kev npaj cov amino acids thiab peptide compounds.
3. Tshwj xeeb functional pab pawg hloov dua siab tshiab
Nitrile txo: hloov cov pab pawg nitrile mus rau hauv thawj amines rau synthesis ntawm antiepileptic tshuaj carbamazepine.
Halogenated hydrocarbon dehalogenation: Hauv cov kuab tshuaj inert, lithum aluminium hydride tuaj yeem tshem tawm halogens los ntawm halogenated hydrocarbons thiab tsim cov hydrocarbon tebchaw.
Txo cov nitro tebchaw: Txo cov tshuaj tsw qab nitro rau azo tebchaw rau kev siv ntxiv hauv cov khoom siv dye.
Case: Thaum synthesizing cov tshuaj tiv thaiv AIDS itravirin, lithum aluminium hydride txo cov ester pawg ntawm cov tseem ceeb nruab nrab, shortening cov tshuaj tiv thaiv theem ntawm 5 mus rau 3, thiab nce tag nrho cov tawm los ntawm 25%.
Daim ntawv thov "ob-edged sword" hauv kev lag luam kws tshuaj
Nws tsis yog tsuas yog siv los ua cov khoom siv hluavtaws hauv kev lag luam tshuaj, tab sis kuj ncaj qha koom nrog kev tshawb fawb thiab kev tsim tshuaj, tab sis nws cov tshuaj toxicity yuav tsum tau tswj nruj me ntsis:
1. Synthesis ntawm cov tshuaj intermediates
Cov tshuaj tua kab mob: Hauv kev sib xyaw ntawm cov tshuaj tua kab mob cephalosporin, lithum aluminium hydride yog siv los txo cov kab mob ester pawg thiab tsim kom muaj pawg cawv.
Antitumor tshuaj: Kev sib txuas ntawm paclitaxel sab chains tso siab rau qhov txo qis ntawm ketone pawg los ntawm lithum aluminium hydride, ua kom muaj kev sib txuas ntawm cov tshuaj thiab microtubule proteins.
2. Kev tshawb nrhiav kev siv tshuaj ncaj qha
Kev kho mob ceev ceev: Lithum aluminium hydride tuaj yeem ua rau lub plab acid (pH{0}}) thiab txo cov tsos mob ntawm plab hnyuv. Tab sis nws cov alkalinity muaj zog (pKa ≈ 36) tuaj yeem ua rau raws plab tau yooj yim, thiab nws tau maj mam hloov los ntawm aluminium magnesium carbonate isothermal thiab formulation hauv kev kho mob.
Kev tiv thaiv kab mob thiab tshuaj tua kab mob: Cov kev tshawb fawb hauv chaw soj nstuam tau pom tias lithum aluminium hydride tuaj yeem cuam tshuam COX-2 enzyme kev ua haujlwm thiab txo cov theem ntawm cov kab mob inflammatory (IL-6, TNF - ) hauv rheumatoid mob caj dab qauv nas los ntawm 30% -50%, tab sis nws tseem tsis tau nkag mus rau kev kho mob vim muaj teeb meem toxicity.
Kev ceeb toom txaus ntshai: LD ₅₀ (kev tswj qhov ncauj rau cov nas) ntawm lithum aluminium hydride yog 100 mg / kg, uas yog cov tshuaj lom neeg heev. Cov khoom siv hydrolysis aluminium hydroxide tuaj yeem tso rau hauv cov ntaub so ntswg ntawm lub paj hlwb, ua rau muaj kev puas tsuaj rau neurotoxicity, yog li kev siv tshuaj yuav tsum ua raws li GMP cov qauv.
Cov khoom siv tswv yim rau Aerospace thiab Nuclear Industries
Lub teeb yuag thiab siab -lub zog ntawm lithum aluminium hydride ua rau nws yog ib qho tseem ceeb raw khoom rau siab -kawg manufacturing:
1. Rocket propellant
Hlawv 1 kg ntawm lithum tuaj yeem tso tawm 42998 kJ ntawm tshav kub, uas yog 20000 npaug ntawm cov thee. Lithum aluminium hydride, raws li cov khoom siv hluav taws xob ntxiv, tuaj yeem ua rau muaj kev cuam tshuam tshwj xeeb (los ntawm 250 s txog 280 s) thiab txo cov nqi foob pob hluav taws. Qee cov qauv ntawm Tuam Tshoj Lub Peb Hlis Lub Peb Hlis Ntuj series foob pob hluav taws tau txais cov khoom sib xyaw uas muaj lithum txhuas hydride.
2. Nuclear reactor tswj pas nrig
Qhov kev nqus ntawm neutron hla ntu ntawm lithum aluminium hydride (σ=0.3 bar) yog nruab nrab thiab tuaj yeem siv los tswj lub zog ntawm cov reactors nuclear. Kev tswj cov pas nrig ntawm EPR nuclear fais fab nroj tsuag hauv Fabkis yog ua los ntawm lithum aluminium hydride boron carbon composite khoom kom ua tiav qhov ntsuas kub.
3. Satellite hydrogen cia rau lub zog
Nyob rau hauv qis orbit satellites, lithum aluminium hydride hydrogen cia qhov system tuaj yeem muab cov khoom siv hydrogen rau roj hlwb, nrog lub roj teeb lub neej peb zaug ntev dua li cov roj teeb lithum. European Copernicus ib puag ncig saib xyuas satellite tau siv cov thev naus laus zis no.
Lub 'Secret weapon' ntawm industrial catalysis thiab cov khoom hloov kho
Qhov muaj zog reducibility thiab alkalinity ntawm lithum aluminium hydride ua rau nws ib qho catalyst lossis additive rau ntau yam kev lag luam.
1. Catalyst rau polymerization cov tshuaj tiv thaiv
Hauv butadiene polymerization, lithum aluminium hydride tuaj yeem tswj hwm qhov hnyav molecular faib ntawm cov polymer (Mw / Mn txo los ntawm 3.0 txog 1.5), txhim kho lub zog tsim kua muag ntawm cov roj hmab. Tuam Tshoj Zhongce Roj Hmab Pab Pawg tau siv nws rau kev tsim cov siab - cov log tsheb ua haujlwm, ua kom hnav tsis kam los ntawm 20%.
2. Hlau refining deoxidizer
Nyob rau hauv tooj liab smelting, ntxiv 0.001% lithum aluminium hydride tuaj yeem tshem tawm cov pa impurities (los ntawm 50 ppm txog 5 ppm) thiab nce conductivity mus rau 101% IACS (International Annealed Copper Standard). Tom qab Jiangxi Copper Group tau txais cov thev naus laus zis no, kev tsim nyog ntawm cov khoom siv tooj liab tau nce los ntawm 92% mus rau 98%.
3. Ceramic khoom sintering additive
Lithum aluminium hydride tuaj yeem txo qhov kub thiab txias ntawm silicon nitride ceramics (los ntawm 1800℃mus rau 1600 degree), thaum txo qis kev loj hlob tsis zoo, ua rau lub zog khoov ntawm ceramics ntawm 800 MPa rau 1200 MPa.
Cov khoom lag luam muaj peev xwm nyob rau hauv kev txiav - ntu thev naus laus zis
Nrog kev siv thev naus laus zis, daim ntawv thov ntawm lithum aluminium hydride nyob rau hauv qhov kev tshwm sim tau nthuav dav:
1. Quantum suav cov ntaub ntawv
Lithum aluminium hydride nyias zaj duab xis tuaj yeem siv los ua cov khoom siv substrate rau superconducting quantum khoom, thiab nws qhov qis dielectric tsis tu ncua (ε ≈ 3) tuaj yeem txo cov teeb liab poob. IBM quantum computing team qhov kev sim qhia tau hais tias cov khoom siv no txuas ntxiv lub sijhawm sib txuas ntawm quantum bits mus rau 100 μs.
2. 3D luam ntawv ntawm cov hmoov hlau
Aluminium alloy hmoov coated nrog lithum aluminium hydride (xws li AlSi10Mg) tuaj yeem cuam tshuam cov kab nrib pleb thaum lub sij hawm xaiv laser melting (SLM) txheej txheem, thiab qhov ceev ntawm cov ntawv luam tawm tuaj yeem ncav cuag 99.9%. EOS, lub tuam txhab German, tau ua lag luam nws rau kev tsim cov dav hlau cav hniav.
3. Cov khoom siv hluav taws xob hloov tau yooj yim
PDMS composite tuaj yeem siv los npaj cov khoom siv hluav taws xob elastomers (nrog rau cov khoom siv hluav taws xob ntawm 10 S / m) rau cov khoom siv electrodes.
Cov khoom siv tshuaj lom neeg ntawmlithium aluminium hydride hmoovyog qhia nyob rau hauv cov nram qab no yam:
Nws yog metastable nyob rau hauv chav tsev kub. Thaum lub sij hawm ntev - khaws cia, lithum aluminm hydride yuav decomposed rau hauv Li3AlH6 thiab LiH. Cov txheej txheem no tuaj yeem ua kom nrawm los ntawm cov ntsiab lus cocatalytic xws li titanium, hlau thiab vanadium. Thaum cua sov lithum aluminm hydride, cov tshuaj tiv thaiv mechanism muab faib ua peb kauj ruam:
3LiAlH4 → Li3AlH6 + 2Al + 3H2↑(R1)
2Li3AlH6 → 6LiH + 2Al + 3H2↑(R2)
2 LiH + 2Al → 2LiAl + H2↑(R3)
R1 feem ntau pib nrog melting ntawm lithium aluminm hydride, nrog ib tug kub ntawm 150 ~ 170 degree, thiab ces decomposes rau Li3AlH6 tam sim ntawd, tab sis R1 yog nqa tawm hauv qab lub melting point ntawm LiAlH4. Thaum txog 200 degree, Li3AlH6 decomposes rau hauv LiH thiab Al (R2), thiab tom qab ntawd decomposes rau LiAl (R3) saum 400 degree. Hauv kev xyaum, cov tshuaj tiv thaiv R1 yog irreversible, thaum R3 yog thim rov qab, thiab qhov sib npaug siab ntawm 500℃yog 25 kPa. Cov tshuaj tiv thaiv ntawm R1 thiab R2 tuaj yeem tshwm sim ntawm chav tsev kub nrog cov catalyst tsim nyog.
LiAlH4 reacts hnyav thiab tawg nrog dej thiab tso tawm hydrogen:
LiAlH4 + 2H2O → LiAlH2 + 4H2↑
LiAlH4 + 4H2O → LiOH +Al(OH)3+ 4H2↑
Txij li thaum cov hydrogen tso tawm kom muaj nuj nqis, cov tshuaj tiv thaiv no tuaj yeem siv los txiav txim siab cov ntsiab lus ntawm lithum aluminium hydride hauv cov qauv. Txhawm rau tiv thaiv cov tshuaj tiv thaiv los ntawm kev ua nruj ua tsiv, qee qhov dioxane, ethylene glycol dimethyl ether lossis tetrahydrofuran feem ntau ntxiv raws li diluent. Cov tshuaj tiv thaiv no muab ib txoj hauv kev zoo rau kev tsim cov hydrogen. Cov qauv raug rau huab cua ntev ntev feem ntau yuav tig dawb vim tias cov qauv tau nqus dej txaus los tsim cov xim dawb uas muaj lithum hydroxide thiab aluminium hydroxide.
Cov tshuaj ether lossis tetrahydrofuran ntawm LiAlH4 tuaj yeem hnov mob hnyav nrog ammonia tso tawm hydrogen:
LiAlH4+4NH3 → LiAl (NH2) 4+2H2 ↑
Thaum tus nqi ntawm ammonia tsis txaus, cov tshuaj tiv thaiv hauv qab no tshwm sim:
2LiAlH4+5NH3 → [LiAlH (NH2) 2] 2NH+6H2 ↑
Thaum NH3 / LiAlH4 piv me me, tag nrho peb cov hydrogen hauv ammonia tuaj yeem hloov pauv:
3LiAlH4+NH3 → (LiAlH3) 3N+3H2 ↑
Lithium aluminm hydride tuaj yeem cuam tshuam nrog yuav luag txhua halides los tsim kom muaj kev sib koom ua ke ntawm txhuas hydride. Thaum qhov kev sib koom ua ke aluminium hydride tsis ruaj khov, nws yuav raug decomposed rau hauv hydride sib xws. General formula yog:
nLiAlH4+MXn → M (AlH4) n+nLiX, M (AlH4) n → MHn+nAlH3
Yog li ntawd, ntau cov hlau los yog tsis yog -metallic hydrides tuaj yeem npaj los ntawm txoj kev no, xws li
LiAlH4+4NaCl → 4NaH+LiCl+AlCl3
Lithum aluminm hydride tuaj yeem ua cov tshuaj tiv thaiv ob npaug nrog NaH hauv tetrahydrofuran kom ua tau zoo tsim sodium aluminium hydride (NaAlH4):
LiAlH4+NaH → NaAlH4+LiH
Potassium aluminium hydride (KAlH4) tuaj yeem npaj tau zoo ib yam nrog diethylene glycol dimethyl ether ua hnyav:
LiAlH4+KH → KAlH4+LiH
Nws tuaj yeem txo ntau cov organic tebchaw, thiab nws cov tshuaj ether lossis tetrahydrofuran feem ntau siv hauv kev xyaum. Lub peev xwm txo qis ntawm lithium aluminm hydride muaj zog dua li ntawm sodium borohydride cuam tshuam, vim tias Al-H daim ntawv cog lus tsis muaj zog dua li B-H daim ntawv cog lus. Vim yog kev cia thiab siv tsis yooj yim, bis (2-}methoxyethoxy) sodium aluminium hydride (liab aluminium), ib qho derivative ntawm lithum aluminm hydride, feem ntau yog siv los ua tus neeg saib xyuas hauv kev lag luam, tab sis lithum aluminm hydride tseem siv hauv kev lag luam me me.
Cov pab pawg ua haujlwm uas tuaj yeem raug txo los ntawmlithium aluminium hydride hmoovfeem ntau suav nrog:
Haloalkanes raug txo kom alkanes. Cov tshuaj tiv thaiv ntawm iodoalkanes yog ceev tshaj plaws, ua raws li bromoalkanes thiab chloroalkanes. Hauv cov tshuaj tiv thaiv no, thawj haloalkanes (thawj haloalkanes) muaj kev ua tau zoo, thiab cov khoom tau txais kev hloov pauv, yog li cov tshuaj tiv thaiv no suav tias yog SN2 mechanism. Secondary halogenated alkanes (secondary halogenated alkanes) kuj raug txo los ntawm txoj kev no. Cov tertiary halogenated hydrocarbons (tertiary halogenated alkanes) yog nquag tshem tawm cov tshuaj tiv thaiv, yog li txoj kev no tsis siv tau. Lithum aluminm hydride tsuas yog siv los txo cov alkynes nrog cawv pawg nyob ze, thiab tsis tuaj yeem siv los txo cov olefins yooj yim thiab muaj ntxhiab hydrocarbons.
Silicon halides raug txo kom silane, xws li
LiAlH4+SiCl4 → SiH4+LiCl+AlCl3
Carbonyl tebchaw (tshwj tsis yog amides) raug txo rau cov cawv, xws li esters thiab carboxylic acids tuaj yeem txo qis rau thawj cov cawv los ntawm lithum aluminm hydride. Ua ntej qhov kev tshawb pom ntawm txoj kev txo cov esters los ntawm lithum aluminm hydride, ester feem ntau raug txo los ntawm Bouver Brown txo cov tshuaj tiv thaiv, uas yog, boiling hlau sodium anhydrous cawv raws li tus neeg sawv cev txo, tab sis cov tshuaj tiv thaiv no nyuaj rau ua. Aldehydes thiab ketones kuj tuaj yeem txo qis rau cov cawv los ntawm lithium aluminm hydride, tab sis ntau cov tshuaj me me xws li NaBH4 feem ntau yog siv los txo. , - Unsaturated ketones yuav raug txo rau allyl cawv.
Epoxy txheej. Thaum cov epoxy compound txo qis, lithum aluminm hydride reagent yuav tawm tsam qhov qis qis qis kawg ntawm cov epoxy compound, feem ntau tsim cov cawv theem nrab lossis qib thib ob. Cyclohexane oxide yuav raug txo kom tsawg rau Cawv ntawm daim ntawv cog lus (upright bonds).
Amides thiab imides raug txo rau amines. Cov txiaj ntsig ntawm cov tshuaj tiv thaiv no feem ntau yog siab, thiab cov tshuaj tiv thaiv ntawm N, N- cov khoom siv hloov pauv sai dua li lwm tus.
Nitrile raug txo mus rau thawj amine. Tsis tas li ntawd, oximes, nitro tebchaw thiab alkyl azides tuaj yeem txo qis rau amines. Quaternary ammonium cations tuaj yeem raug txo mus rau tertiary amines sib raug.
Cov tshuaj tiv thaiv nrog cawv los tsim alkoxy lithium aluminm hydride:
LiAlH4 + ROH → LiAl(OR)H3 + H2↑
LiAlH4 + 2ROH → LiAl(OR)2H2 + 2H2↑
LiAlH4 + 3ROH → LiAl(OR)3H + 3H2↑
LiAl (OR)2H2yog ib qho tsim nyog reagent rau txo amides rau aldehydes, LiAl(OC(CH3)3)3H yog ib qho tsim nyog reagent rau txo acyl chlorides rau aldehydes, thiab lithium aluminm hydride tsis tuaj yeem txo qis acyl chlorides rau cov aldehydes, vim lithum aluminm hydride tuaj yeem txo cov tom kawg rau thawj cawv, yog li nws yog ib qho tsim nyog yuav tsum siv lub me me tri tertlumin butylmoxy lithum (Lithum alumina lithum OC)3)3)3H) txo cov acyl chlorides. Cov tshuaj tiv thaiv ntawm lithum tri tert butoxy aluminium hydride nrog acyl chloride yog nrawm dua li nrog aldehyde. Piv txwv li, qhov sib ntxiv ntawm sulfoxide chloride hauv isovaleric acid yuav tsim isovaleryl chloride. Lub sijhawm no,lithium aluminium hydride hmoovtuaj yeem siv los txo cov isovaleryl chloride rau isovaleraldehyde, thiab cov txiaj ntsig tuaj yeem ncav cuag 65%.
FAQ
Lwm lub npe rau lithium aluminium hydride yog dab tsi?
LiAlH4 thiab NaBH4 Carbonyl Reduction Mechanism - Chemistry StepsLub npe nrov rau LiAlH₄ yog Lithium aluminium hydride (los yog Lithium aluminium hydride). Hauv chemistry, nws yuav luag ib txwm sau ua LAH.
Yuav kim npaum li cas yog lithium aluminium hydride?
Tus nqi ntawm lithium aluminium hydride (LiAlH₄) yog li ntawm ₹3,994 rau 10 g chav kuaj- qib piv rau ntawm ₹26,500 thiab ₹35,000 ib kilogram rau kev lag luam lossis ntau ntau.
Dab tsi yog lithium aluminium hydride siv rau?
Lithium txhuas hydride (LiAlH₄), los yog LAH, yog ib tug muaj zog txo tus neeg sawv cev feem ntau siv nyob rau hauv cov organic synthesis. Nws yog khoom plig rau nws lub peev xwm los hloov cov pab pawg tawv ncauj -zoo li carboxylic acids, esters, thiab amides- mus rau hauv cov cawv thiab amines, txawm hais tias nws muaj kev phom sij txaus ntshai nrog dej.
Puas yog lithium aluminium hydride muaj kev nyab xeeb?
* Lithium Aluminium Hydride tuaj yeem cuam tshuam koj thaum ua pa.
* Kev sib cuag tuaj yeem ua rau tawv nqaij hnyav thiab qhov muag khaus thiab kub hnyiab.
* Ua pa Lithium Aluminium Hydride tuaj yeem ua rau lub qhov ntswg thiab caj pas.
* Ua pa Lithium Aluminium Hydride tuaj yeem ua rau lub ntsws ua rau hnoos thiab / lossis ua pa luv.
Cim npe nrov: Lithium hydride hmoov CAS 16853-85-3, lwm tus neeg, manufacturers, hoobkas, lag luam wholesale, yuav, nqe, tej, kev muag khoom