p-Phenylene diamine; 1,4-diaminobenzene hmoov

Dawb siv lead ua. Hloov rosy nyob rau hauv lub teeb. Hloov ntshav rau saum huab cua. Melting point 140 ℃. Kub taw tes 267 ℃. Yuav sublimated. Me ntsis soluble hauv dej txias, soluble hauv ethanol, ether, chloroform thiab benzene. Nws reacts nrog inorganic acids los tsim cov ntsev uas yooj yim soluble hauv dej. Siv rau hauv kev tsim cov azo dyes thiab sulfur dyes, thiab lwm yam, thiab siv los ua plaub dyes (Fur Black D, Ursol D lossis Fur Black D, Ursol D lossis Fur Black D) thiab tsim cov neeg ua haujlwm. Cov khoom no belongs rau qeb 3 carcinogens. Nws yog tsim los ntawm kev txo qis p-nitroaniline.

Txoj kev tsim khoom

Nws yog tau los ntawm kev txo p-nitroaniline nrog hlau hmoov nyob rau hauv acidic nruab nrab. Muab cov hmoov hlau rau hauv hydrochloric acid, kub rau 90 ° C, thiab ntxiv p-nitroaniline thaum nplawm. Tom qab qhov sib ntxiv ua tiav, hnov ​​​​mob ntawm 95-100 ° C rau 0.5 teev, thiab tom qab ntawd ntxiv cov concentrated hydrochloric acid dropwise kom tiav cov tshuaj txo cov tshuaj tiv thaiv. Tom qab txias, neutralize nrog saturated sodium carbonate tov rau pH 7-8, boil thiab lim thaum kub, thiab ntxuav lub lim ncuav mog qab zib nrog dej kub. Muab cov filtrate thiab ntxuav cov kua, mloog zoo nyob rau hauv lub siab txo, crystallize los ntawm txias los yog distill nyob rau hauv lub siab txo kom tau p-phenylenediamine nrog ib tug yield ntawm 95%.

Cov khoom siv tshuaj

Suav lub npe: p-Phenylenediamine
Lub npe txawv teb chaws: p-Phenylenediamine
Cov tshuaj formula: C6H8N2
Molecular Luj: 108.14
CAS Nr .: 106-50-3
Melting point: 139 ℃
tsos: Dawb rau lavender crystals

Cov ntaub ntawv tiv tauj

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