Formalin. Yuav ua li cas yog khoom no?

Muaj coob tus tau hnov txog qhov teeb meem no, raws li formalin. Yuav ua li cas yog no tshuaj compound? Nws yog feem ntau hu ua formol. Nws yog ib tug tov ntawm formaldehyde (36,5-40%). Raws li cov stabilizer, nws muaj methyl haus cawv (4-12%). Qhov tsis muaj kob pob tshab kua muaj ib tug pungent tsw. Nws yuav tsum tau tov nrog cawv thiab dej nyob rau hauv tej ratio.

Formalin: yog dab tsi?

Qhov no tshuaj yog siv raws li ib tug ntxuav feem ntau. Nws lub ntsiab (0.5-1%) yog siv los ntxuav ntawm daim tawv nqaij nrog ib tug muaj zog tawm hws (ob txhais ceg, qhov tso) thiab bromidrosis (ntse tsis hnov tsw ntawm hws). Formalin yog zoo nyob rau hauv txo lub tso pa tawm ntawm epidermal qog, tab sis nws yuav siv tsis tau rau ib tug txhua txhua hnub. Nyob rau hauv tej rooj plaub, nws yog siv rau irrigation (ntawm ib tug concentration ntawm 0.05%), ntxuav ib ya ntawm caj pa crypt (0.25%). Qhov no tshuaj yog ib feem ntawm "Lysoform" npaj "Formidron" "Tshuaj pleev formalin", "Muab tshuaj txhuam Teymurova".

Sab los thaum siv cov tshuaj no: voos thiab overdrying ntawm daim tawv nqaij, uas disappears thaum lubricating nws muaj muaj roj qab zib los yog zaub roj. Formalin, uas daim ntawv thov yog ua rau o los yog khaus ntawm lub epidermis yuav siv tau tsuas yog tom qab tshem tawm lawv cov.

Kom tuaj tua kab ntawm kev kho mob seev thiab tej yam uas cov neeg mob kuj siv cov tshuaj no. Daim ntawv thov nyob rau hauv cov ntaub ntawv no envisages tsuas 0.5% formalin. Yuav ua li cas yog cov tshuaj no? Rau siv nyob rau hauv kev kho mob xwb tsim ib tug 10% daws nyob rau hauv lub khob vials ntawm 100 ml. Formalin muab cia rau hauv ib tug zoo kaw ntim nyob rau hauv ib tug maub qhov chaw nyob rau ib tug kub ntawm tsis tsawg 9˚S. Qhov no tshuaj yog tias yuav lom rau tib neeg thiab tsiaj.

Cov tshuaj nyob tus yeees ntawm formalin

Yuav ua li cas yog formalin? Cov mis ntawm no cov ntaub ntawv uas - CH ₂ O. Lub formaldehyde (formic aldehyde acid) uas yog ib tug tsis muaj kob roj nrog ib tug suffocating tsw, thaum txias rau -21 ° C yog hloov mus rau hauv ib tug ntshiab. nws melting point yog -92 ° C. Lub oxidation ntawm nws yog hloov dua siab tshiab rau hauv formic acid. Formaldehyde yog tau los ntawm qhov kev txiav txim ntawm huab cua oxygen mus rau methanol nyob rau hauv lub vapor daim ntawv nyob rau hauv lub xub ntiag ntawm catalysts. Ntawm no, cov nyiaj muaj pov thawj tshwj xeeb tsim, txawm hais tias cov kev lag luam siv ntau muaj tooj liab. Cov tau distilled dej accumulates, uas ua rau ib tug formalin. Nws tej zaum yuav muaj impurities ntawm acetone, acetic los yog formic acid. Evaporation ntawm cov tau residue nyob rau hauv formalin tuab loj ntawm polymers uas yog insoluble nyob rau hauv dej txias.

zog formalin

Qhov no tshuaj ua irreversible hloov nyob rau hauv cov proteins ntawm protoplasm. Nyob rau hauv cov ntaub ntawv no, nws yog necrotizing thiab mummified cov ntaub so ntswg. Nyob rau hauv tus ntawm cov tshuaj no rau tus kab mob hlwb yog denatured lawv proteins. Thaum 5% formol rau 0.5h tuag spore fungi. Nyob rau hauv tus ntawm formalin hemoglobin yuav methemoglobin (tshuaj lom oxidation khoom). Thaum lub sij hawm ntev cia nyob rau hauv lub txias chav tsev, cov tshuaj yuav pos huab. Qhov no tas ib whitish precipitate - paraformaldehyde.

Siv formaldehyde tshuaj

Formalin yog siv raws li ib tug yooj yim qhov chaw ntawm formaldehyde, siv nyob rau hauv qhuav ntawm polyvinyl formal. Nws tseem yog tseem ceeb raws li ib tug antiseptic rau lub tua ntawm thaj chaw, cov cuab yeej, cov khaub ncaws, tanning tawv. Nws yog siv rau embalming organic tshuaj (cov kab mob no thiab kabmob). Formalin, uas daim ntawv thov rau cov preservation ntawm anatomic npaj tsis muaj surprise, kuj siv tau raws li ib tug fungicide. Muaj ntau tswv yog etched los ntawm cov tshuaj no, noob, tubers, keeb kwm ua ntej cog thiab sowing.

Formalin, uas yog tswj los ntawm lub zoo ntawm GOST 1625-89, siv nyob rau hauv qhov siv thiab ua cov khoom cua resins, surfactants, roj hmab, polyhydric alcohols , thiab ib co lwm yam derivatives ntawm methylene. formaldehyde tshuaj twb tseem siv nyob rau hauv lub textile kev lag luam. Nws yog siv los txhim kho tus neeg thaj chaw ntawm cov ntaub so ntswg kuj mus shrinkage thiab wrinkling. Nyob rau hauv daim ntawv kev lag luam formalin pab txoj kev ntawv zoo thiab nws lub zog.

Kev Nyab Xeeb ceev faj thaum ua hauj lwm nrog formalin

By yuav cov teeb meem no peb yuav tsum tsis txhob hnov qab tias nws tej zaum yuav txaus ntshai formaldehyde. Yuav ua li cas hom ntawm kev ceev faj? Warranty lub sij hawm ntawm cia ntawm lub substance los ntawm tus raug hnub - 90 hnub. Formalin yog muag nyob rau hauv hwj, kaus poom, drums. formaldehyde tshuaj yuav tsum tau khaws cia kom deb li deb deb ntawm cov me nyuam. Thaum tau txais formalin hauv muaj ib tug burning nov ntawm nqaij tawv thiab mob nyob rau hauv cov hlab pas thiab lub plab. Tom qab hais tias muaj yog ntuav ntshav. Tsis tas li ntawd, thaum formalin lom tshwm sim hnoos, txham, hyperthermia ntawm lub qhov muag, ua tsis taus pa. Ib tug neeg yuav muaj kev tu-sauv, kiv taub hau, ntshai sib cem. Nyob rau hauv tej rooj plaub, formalin lom yog neeg tuag taus, uas tshwm sim vim ua pa tuag tes tuag taw thiab asphyxiation. Tuag koob tshuaj - 10-15 mL ntawm 35% cov kua. Cov tsis hnov tsw ntawm formaldehyde nyob rau hauv siab ntau yuav tau ua ib tug tsis haum cov tshuaj tiv thaiv.