Formaldehyde yog dab tsi?
Formaldehyde yog ib qho tsis muaj kob uas tsis muaj roj, muaj roj rau cov ntxhiab tsw. Ib qho me me ntawm formaldehyde raug tsim nyob rau hauv peb lub cev lawm, tiam sis feem ntau formaldehyde tso rau hauv qhov chaw los ntawm kev kub ntxhov thiab tsev pov tseg. Cov pa luam yeeb thiab cov e-luam yeeb muaj ob qho tib si muaj formaldehyde.
Feem coob ntawm peb xav txog formaldehyde ua kua, tab sis qhov tseeb, cov khoom uas siv los khaws cia cov khoom coj mus kuaj yog hu ua formalin, sib tov ntawm formaldehyde roj, dej thiab methyl haus cawv.
Formaldehyde tseem yog tshuaj muaj tshuaj uas muaj nyob hauv ntau cov ntawv. Nws yog siv los tsim cov khoom siv hauv tsev (suav nrog cov ntoo khoom nias khoom) thiab ntau yam khoom hauv tsev, thiab yog ib feem ntawm cov txheej txheem tsim rau cov ntaub qhwv ntawv dawb. Formaldehyde kuj tseem siv tau rau hauv kev tawm tsam, cov khoom siv thiab tshuaj tua kab mob.
Kuj ceeb tias, formaldehyde tseem raug siv los deactivate viruses thiab co toxins uas siv los ua cov tshuaj tiv thaiv. Txoj haujlwm no yog tswj los ntawm US Food and Drug Administration.
Feem Ntau Tib Neeg Txoj Kev
Txoj kev uas feem ntau yog cov neeg raug cov txheej txheem ntawm formaldehyde yog los ntawm kev ua pa rau hauv cov huab cua uas muaj teeb meem hauv qhov chaw tsis zoo hauv vaj tse. Cov khoom uas ua nrog formaldehyde tuaj yeem tso cov pa roj no tawm hauv lub sijhawm, ua rau cov concentration txhawm rau txhim kho cov cheeb tsam.
Lwm hom kev tshwm sim los ntawm kev haus luam yeeb, uas yog laden nrog formaldehyde.
Kev tshawb nrhiav pom tias tus e-luam yeeb vapor kuj muaj cov ntaub ntawv, tab sis feem ntau yog tsawg tshaj li uas muaj nyob hauv cov pa luam yeeb. Kev nqus pa nqus pa nqus pa thiab lwm tus haus luam yeeb sab hauv tsev yog qhov zoo tshaj rau kev tsim tawm ntawm formaldehyde thiab.
Formaldehyde hauv luam yeeb Haus luam yeeb
Formaldehyde yog ib tug by-product ntawm cov txheej txheem combustion ntawm kev haus luam yeeb.
Raws li ib tsab xov xwm nyob rau hauv American Journal of Public Health, formaldehyde nyob rau hauv cov pa luam yeeb (cov pa luam yeeb los ntawm qhov xaus ntawm ib qho kev haus luam yeeb) yog nyob rau hauv cov concentrations txog li peb lub sij hawm ua haujlwm.
Tus neeg haus luam yeeb muaj 20 tus kabmob hauv ib hnub yuav muaj theem ntawm formaldehyde nyob rau hauv lawv cov ntshav uas ntsuas ntawm .9 thiab 2 milligrams nyob ntawm hom tshuaj luam yeeb thiab seb qhov chaw zoo li cas lawv haus luam yeeb.
Formaldehyde yog lub luag hauj lwm rau qee qhov ntawm lub qhov ntswg, caj pas thiab qhov muag tsis zoo haus thaum ua pa hauv luam yeeb.
Formaldehyde nyob rau hauv E-Cigarette Vapor
Nyob rau hauv tsab ntawv luam tawm rau lub Ib Hlis 22, xyoo 2015, Cov kws tshawb fawb pom tau hais tias "daim npog ntsej muag" ntawm formaldehyde nyob rau hauv cov kua dej txias los ntawm e-cigarette vapor hauv concentrations ntau dua hauv luam yeeb. Cov kws tshawb fawb hu rau nws masked vim nws yog ib daim ntawv me me ntawm formaldehyde - ib qho uas lawv xav tias feem ntau yuav tau tso rau cov pob txha ntsws, ib zaug inhaled.
Formaldehyde qib nyob rau hauv cov ntshav yuav tsawg dua lawv cov nrog luam yeeb. Qhov nruab nrab ntsuas yog kwv yees li 1mg, tiam sis qhov no yog nyob ntawm seb qhov hluav taws xob hauv hluav taws xob yog siv los tswj cov e-luam yeeb thiab cov nyiaj nquag.
Cov Kev Phom Sij Hawm Luv Ntev
Thaum formaldehyde nyob rau hauv cov huab cua ntawm theem siab tshaj 0.1 feem pua ntawm ib nrab, qee cov tib neeg yuav muaj kev noj qab haus huv luv luv, xws li:
- watering ntawm ob lub qhov muag
- kub taub hau ntawm qhov muag, taub ntswg, thiab caj pas
- hnoos
- hawb pob
- xeev siab
- tawv nqaij khaus
Qee cov tib neeg muaj kev paub zoo txog formaldehyde, hos lwm tus neeg tsis muaj qhov tshwm sim rau tib theem. Cov neeg uas muaj kev xav tau ntawm formaldehyde khiav txoj kev pheej hmoo ntawm kev mob hawb pob los ntawm kev kis tau mus ntxiv rau inhaled formaldehyde.
Kev Noj Ntev Rau Kev Noj Qab Haus Huv Ntev
Cov kev tshawb fawb (lab) tau pom tias raug rau formaldehyde yuav ua rau qhov ntswg cancer hauv cov nas tsuag, thiab tej kev tshawb fawb ntawm cov neeg ua haujlwm tau pom tias cov ntaub ntawv tawm hauv cov ntaub ntawv tuaj yeem raug tus mob khees xaws thiab nasopharangeal cancer rau tib neeg.
Hauv xyoo 1995, Lub Chaw Khiav Dej Num Kev Tshawb Fawb Txog Kev Tshawb Fawb Rau Kev Mob Cancer (IARC) xaus lus tias formaldehyde yog ib tug tib neeg tus kab carcinogen. Txawm li cas los xij, hauv kev rov ntsuam xyuas cov ntaub ntawv uas muaj nyob rau lub Rau Hli 2004, IARC cais tawm ntawm formaldehyde raws li ib tus neeg paub tus kab mob carcinogen.
Vim hais tias nws hloov cov tshuaj nyob hauv ib qho yooj yim thaum nws yog absorbed, kws tshawb xav tias inhaled formaldehyde feem ntau yog ib qho kev pheej hmoo ua rau mob qog nqaij hlav cancer. Yuav tsum tshawb xyuas ntau ntxiv kom to taub tias muaj dab tsi tshwm sim thaum nws ncav cuag lub ntsws.
Cov neeg tshawb xyuas kuj ntseeg tias formaldehyde yog ib qho tseem ceeb ntawm cov kab mob myeloid leukemia.
Kev Haus Luam Yeeb Cig: Ib Cov Tshuaj Tua Hluav Taws Xob
Txog hnub tim, kev tshawb fawb pom tias muaj ntau tshaj li 7,000 tshuaj, suav nrog 250 qhov tshuaj lom thiab 70 cov kab mob carcinogenic hauv luam yeeb ua luam yeeb.
Yog tias koj tseem haus luam yeeb, pib ua hauj lwm rau kev npaj los txiav luam yeeb . Haus luam yeeb tsis muaj dab tsi tab sis muaj kab mob thiab kawg, tuag.
Qhov chaw:
American Chemistry Council. Vim li cas Formaldehyde Siv Tshuaj Tiv Thaiv? Tau txais lub kaum hli ntuj xyoo 2016.
International Agency rau kev tshawb fawb ntawm Cancer. IARC Faib Formaldehyde Ua Rau Cov Txiv neej. Lub Rau Hli 15, 2004.
National Cancer Institute. Formaldehyde thiab Cancer yuav raug. Xyuas Lub Xya hli ntuj 10, 2011.
New England Journal of Medicine. Hauv Formaldehyde hauv E-Cigarette Aerosols. N Engl J Med 2015; 372: 392-394. Lub Ib Hlis 22, 2015.
Ntxawg Toxicology thiab Pharmacology. Cov nyhuv ntawm qhov sib txawv ntawm cov hwj huam ntawm cov paib ntawm tag nrho aerosol pawg thiab tsim muaj aldehydes hauv e-luam yeeb aerosols. Lub Peb Hlis Ntuj, 2016.