Ethyl cyanoacetate (CAS # 105-56-6)
| Hazard Cov Cim | Xi-Nyob |
| Risk Codes | R36/38 - Kab mob rau qhov muag thiab tawv nqaij. |
| Kev nyab xeeb piav qhia | S26 - Thaum sib cuag nrog lub qhov muag, yaug tam sim ntawd nrog dej txaus thiab nrhiav kev kho mob. S37/39 - Hnav cov hnab looj tes tsim nyog thiab tiv thaiv qhov muag / ntsej muag |
| UN IDs | TIAB SA 2666 |
Ethyl cyanoacetate (CAS # 105-56-6) Taw qhia
Ethyl cyanoacetate, CAS naj npawb 105-56-6, yog ib qho tseem ceeb organic chemical raw khoom.
Raws li kev tsim qauv, nws muaj ib pawg cyano (-CN) thiab ib pawg ethyl ester (-COOCH₂CH₃) hauv nws cov molecule, thiab qhov kev sib xyaw ua ke ntawm cov qauv no ua rau nws muaj ntau hom tshuaj lom neeg. Nyob rau hauv cov nqe lus ntawm lub cev muaj zog, nws yog feem ntau tsis muaj xim rau lub teeb daj kua nrog ib tug tshwj xeeb tsw, melting point ntawm -22.5 ° C, boiling point nyob rau hauv thaj tsam ntawm 206 - 208 ° C, soluble nyob rau hauv organic solvents xws li cawv. thiab ethers, thiab qee yam solubility hauv dej tab sis kuj me me.
Hais txog cov khoom siv tshuaj, qhov muaj zog polarity ntawm pawg cyano thiab cov yam ntxwv esterification ntawm pawg ethyl ester txiav txim siab tias nws tuaj yeem ua rau muaj kev cuam tshuam ntau yam. Piv txwv li, nws yog ib qho classical nucleophile, thiab pawg cyano tuaj yeem koom nrog Michael ntxiv cov tshuaj tiv thaiv, thiab kev sib txuas ntxiv nrog α,β-unsaturated carbonyl compounds tuaj yeem siv los tsim cov carbon-carbon bonds tshiab, uas muab txoj hauv kev zoo rau synthesis ntawm complex organic molecules. Ethyl ester pawg tuaj yeem ua rau hydrolyzed nyob rau hauv acidic lossis alkaline tej yam kev mob los tsim cov carboxylic acids, uas yog qhov tseem ceeb hauv kev hloov pauv ntawm pawg ua haujlwm hauv cov organic synthesis.
Nyob rau hauv cov nqe lus ntawm kev npaj, ethyl chloroacetate thiab sodium cyanide feem ntau yog siv los ua raw cov ntaub ntawv los npaj los ntawm nucleophilic hloov cov tshuaj tiv thaiv, tab sis cov txheej txheem no yuav tsum nruj me ntsis tswj qhov ntau npaum thiab cov tshuaj tiv thaiv ntawm sodium cyanide, vim hais tias ntawm nws cov toxicity siab thiab tsis ua hauj lwm, nws yog ib qho yooj yim los ua kom muaj kev nyab xeeb kev nyab xeeb, thiab nws tseem yuav tsum tau ua tib zoo saib xyuas cov kauj ruam tom ntej kom tau txais cov khoom siv purity siab.
Hauv cov ntawv thov kev lag luam, nws yog ib qho tseem ceeb hauv kev sib txuas ntawm cov tshuaj zoo xws li tshuaj, tshuaj tua kab, thiab tshuaj tsw qab. Hauv cov tshuaj, nws yog siv los tsim cov tshuaj sedative-hypnotic xws li barbiturates; Nyob rau hauv lub tshav pob ntawm tshuaj tua kab, koom nyob rau hauv lub synthesis ntawm tebchaw nrog insecticidal thiab herbicide kev ua si; Hauv kev sib xyaw ntawm cov tshuaj tsw qab, nws tuaj yeem tsim cov pob txha ntawm qhov tshwj xeeb tsw molecules thiab muab cov khoom siv tshwj xeeb rau kev sib xyaw ntawm ntau yam flavors, uas plays lub luag haujlwm tseem ceeb hauv kev txhawb nqa kev lag luam niaj hnub, kev ua liaj ua teb thiab cov neeg siv khoom lag luam.
Nws yuav tsum tau hais tias vim yog pawg cyano, Ethyl cyanoacetate muaj qee yam tshuaj lom thiab ua rau khaus ntawm daim tawv nqaij, qhov muag, ua pa, thiab lwm yam, yog li nws yuav tsum tau hnav cov cuab yeej tiv thaiv hauv ib puag ncig zoo thaum ua haujlwm, thiab nruj me ntsis ua raws li cov cai tswj kev nyab xeeb ntawm cov chaw soj nstuam tshuaj thiab kev tsim tshuaj.
