cov khoom siv los ua cov pob naphthalene yog cov khoom sib tw Piav: Lawv yog cov pob camphor lossis npauj npaim, cov khoom sib txuas ntawm cov khoom dawb uas muaj tsawg kawg yog 98 feem pua naphthalene. Naphthalene yog bicyclic aromatic hydrocarbon muab tau los ntawm thee tar los yog roj crude.
Qhov twg yog siv los ua cov pob naphthalene Chav Kawm 8?
Yog li, cov pob naphthalene tau los ntawm coal tar thiab siv los ua npauj tua. Yog li, qhov kev xaiv raug yog C.
Koj ua li cas naphthalene pob?
Txheej Txheem Kev Tsim Khoom:
Naphthalene flakes tau pub rau hauv lub nkoj uas muaj qhov kub thiab txias ntawm 88 ° C thiab tus agitator stirs cov khoom. Thaum naphthalene melts, lwm cov khoom xyaw xws li paraffin wax, camphor thiab lwm yam ntxiv thiab sib tov kom huv si.
Cov pob naphthalene tau npaj thiab siv li cas?
Mothballs yog cov khoom me me ntawm cov tshuaj tua kab thiab nws yog deodorant, qee zaum siv thaum khaws khaub ncawslwm yam khoom raug puas tsuaj los ntawm pwm lossis npauj kab laug sab (tshwj xeeb yog cov kab npauj npauj zoo li tineola bisselliella) naphthalene yog ua cov roj crude thee tar. …
Puas naphthalene lom rau tib neeg?
Mob (lub sij hawm luv) raug tib neeg rau naphthalene los ntawm kev nqus, noj, thiab kev sib cuag dermal yog txuam nrog hemolytic anemia, kev puas tsuaj rau daim siab, thiab kev puas tsuaj rau lub paj hlwb. … EPA tau muab cov tshuaj naphthalene ua ib pawg Pob C, ua tau tib neeg carcinogen.
