Camphor npauj repellant
Camphor moth repellent yog raws li hluavtaws camphor los yog natural camphor raws li cov khoom siv raw, thiab ib feem ntawm cov khoom siv ntxiv xws li pigments, essences lossis spices yog ntxiv thaum tsim nyog. , deworming, antiseptic, xyab thiab lwm yam khoom camphor. Camphor yog cov xim tsis muaj xim lossis dawb crystal, translucent block los yog hmoov, flammable, muaj ib tug muaj zog camphor ntoo thiab ntsim saj, yuav maj mam volatilized nyob rau hauv chav tsev kub, thiab nws vapor yuav tua kab, sparrows thiab lwm yam noog. Camphor tau siv rau ze li ib puas xyoo los ua npauj tua rau khaub ncaws thiab phau ntawv. Ntuj camphor muaj nyob rau hauv cov ntoo camphor, cov khoom siv raw yog chav distilled kom tau cov roj camphor, thiab tom qab ntawd fractionated nyob rau hauv kev txo qis kom tau txais camphor, uas yog purified los ntawm sublimation kom tau refined camphor. Vim qhov tsis txaus ntawm cov khoom siv raw, kev tsim cov natural camphor yog txwv. Ntuj camphor yog optically active (tig lub dav hlau vibration ntawm polarized lub teeb), thaum hluavtaws camphor tsis optically active. Synthesis ntawm camphor muaj ib tug series ntawm cov tshuaj tiv thaiv xws li isomerization ntawm pinene nyob rau hauv turpentine, ntxiv thiab esterification ntawm camphene ua raws li los ntawm saponification (los yog ncaj qha hydration ntawm camphene), dehydrogenation ntawm isoborneol, thiab ib tug series ntawm rectification, crystallization thiab sublimation. Ib yam khoom tau txais thaum lub sijhawm ua haujlwm tshuaj. Nws yog cov hmoov dawb crystalline hmoov, tsis muaj kev ua haujlwm kho qhov muag, nrog cov ntxhiab tsw ntxhiab thiab txias txias. Txhua hnub camphor yog hais txog hluavtaws camphor lossis natural camphor raws li cov khoom siv raw, yog tias tsim nyog, ib qho kev faib ua feem ntawm cov khoom siv ntxiv xws li pigments, essences lossis spices ntxiv, thiab tom qab ntawd los ntawm cov txheej txheem ntawm stamping thiab tsim, nws muaj ntau yam duab thiab qhov ntau thiab tsawg. , feem ntau yog siv rau npauj-pov thawj, kab-repellent, anti-corrosion, xyab thiab lwm yam camphor khoom rau khaub ncaws, fabrics, phau ntawv, archives, ntawv, ntoo thiab lwm yam khoom.
Camphor tsis haum rau cov khaub ncaws fiber ntau. Nyob rau hauv lub teeb, cov fibers yuav o, ceev ceev yuav raug txo, thiab nyob rau hauv hnyav hnyav, cov ntaub yuav yaj. Tshwj xeeb yog acrylic fabrics yaj sai dua. Qhov qhov tuaj yeem tshwm sim tom qab camphor tau ntsib nrog cov khaub ncaws acrylic rau ob peb teev. Tsis tas li ntawd, mothballs muab tso rau ntawm cov ntaub lo lo ntxhuav kuj yuav ua rau yellowing, thiab cov nyhuv anti-moth tsis zoo. Camphor yog volatile nyob rau hauv chav tsev kub, thiab cua sov yuav ua kom volatilization. Camphor muaj cov nyhuv tsis zoo los tiv thaiv npauj thiab yooj yim rau deliquescence. Kev nqus pa ntau dhau ntawm camphor vapor tuaj yeem ua rau mob hnyav nrog cov tsos mob ntawm lub paj hlwb. Thaum Lub Peb Hlis 23, 1999, Lub Xeev Environmental Protection Administration tau pom zoo, tshaj tawm thiab siv cov txheej txheem kev cai rau ib puag ncig cov khoom lag luam ntawm cov tshuaj tua kab zoo. p-dichlorobenzene.
Moth repellent nrog naphthalene ua raw khoom
Naphthalene yog ib yam khoom uas muab los ntawm cov roj av los yog thee tar tov nrog naphthol derivatives. Naphthalene muaj qhov muaj zog camphor tsw, yooj yim volatile thiab sublimated, tuaj yeem ignited, thiab muaj pa taws ntau hauv lub teeb tsis muaj zog. Nws cov vapor muaj cov nyhuv tshuaj loog, thiab qhov siab tshaj plaws tso cai yog 10mg / cm. Naphthalene yog ib qho mob me me rau ntawm daim tawv nqaij thiab yog tsim los ntawm qhov kub thiab txias fractionation ntawm thee tar. Cov nyhuv repellent zoo dua li camphor. Ob leeg naphthalene thiab naphthol yog tshuaj lom heev. Hauv qhov mob me, lawv tuaj yeem ua rau tib neeg tawv nqaij, lossis ua rau mob taub hau, xeev siab, tsis qab los noj mov thiab lwm yam kev cuam tshuam; Nyob rau hauv cov xwm txheej hnyav, lawv tuaj yeem ua rau lub raum puas thiab hemolytic anemia, tshwj xeeb tshaj yog cov uas muaj erythrocyte enzyme defects. Cov menyuam yaus muaj mob ntau dua rau hemolytic anemia. Naphthalene tau teev tseg raws li tib neeg cov carcinogen los ntawm World Health Organization thiab International Center for Research on Cancer, thiab tsis tu ncua raug rau naphthalene muaj qee yam kev pheej hmoo ntawm mob qog noj ntshav. Raws li thaum ntxov xyoo 1992, Lub Xeev Thawj Tswj Hwm rau Kev Lag Luam thiab Kev Lag Luam tau txwv tsis pub siv cov tshuaj naphthalene li npauj npaim, tab sis cov pob huv si thiab cov npauj npaim uas tsim nrog naphthalene li raw khoom tseem tuaj yeem pom hauv khw. Cov tshuaj naphthalene ntawm lub pob huv huv, feem ntau hu ua cov tshuaj stinky, yog cov tshuaj tiv thaiv kab mob thiab cov kab mob mildew. Txij li thaum nws tau raug pov thawj los ua mob qog noj ntshav, txij li thaum xyoo 1993, kuv lub tebchaws tau txwv tsis pub tsim khoom, muag thiab siv nws. Tab sis tseem muaj "mothballs" ua los ntawm refined naphthalene ntawm lub khw
Moth repellent nrog p-dichlorobenzene ua raw khoom
Nyob rau xyoo 1940, cov teb chaws txawv teb chaws tau pib ua ntau qhov kev tshawb fawb txog "para-dichlorobenzene", uas ntseeg tau tias muaj tshuaj lom rau lub siab thiab lub raum, nrog rau cov thyroid caj pas. Cov koob tshuaj loj muaj qee yam carcinogenicity rau cov tsiaj txhu thiab muaj kev phom sij rau tib neeg. yog xav tias carcinogens. Txij li Lub Koom Haum Thoob Ntiaj Teb rau Kev Tshawb Fawb Txog Kev Kho Mob tau teev tseg p-dichlorobenzene raws li tib neeg cov kab mob carcinogen, yuav luag tsis muaj cov tshuaj tua kab mob uas siv p-dichlorobenzene ua raw khoom hauv kev lag luam ntawm cov teb chaws tsim kho xws li Europe, America thiab Nyiv. Para-dichlorobenzene yog tsim los ntawm chlorination ntawm benzene, uas tsis tshua muaj melting point, ceev sublimation, muaj zog tsw, thiab zoo anti-mob nyhuv tshaj camphor thiab tshuaj yej. Dhau li ntawm kev siv los ua npauj tshuaj tua kab mob, nws tseem tuaj yeem siv los ua cua deodorant nrog qhov siab tshaj plaws tso cai ntawm 75 mg / cm3, thiab muaj cov nyhuv tiv thaiv kab mob. Nws qhov ceev yog siab, thiab nws yooj yim los txheeb xyuas nrog camphor. Lub hauv paus ntawm p-dichlorobenzene muaj ntau, thiab cov khoom lag luam feem ntau yog 100% crystalline. Tus mob toxicity yog ze rau cov tshuaj lom me ntsis, tab sis nws muaj kev cuam tshuam rau hauv nruab nrab paj hlwb ntawm cov tsiaj. Nws yog khaus rau qhov muag thiab ua pa sab sauv, tab sis tsis ua rau tawv nqaij. Nws yog cov tshuaj npauj pov thawj nrov hauv Suav teb tom qab kev txwv tsis pub noj tshuaj naphthalene. Tebchaws Meskas tau siv nws los hloov cov tshuaj carcinogen "refined naphthalene" txij li xyoo 1970. Paradichlorobenzene tau siv rau hauv kev lag luam thiab cov neeg siv khoom lag luam hauv Tebchaws Meskas tsawg kawg 70 xyoo, thiab ntxiv rau nws qhov kev pom zoo tag nrho raws li qhov chaw ua haujlwm deodorant, paradichlorobenzene yog ntau ntawm nws vim nws muaj peev xwm tiv thaiv borers los ntawm kev puas tsuaj fibers.
Cov khoom tseem ceeb ntawm npauj pov thawj pob thiab npauj pov thawj cov khoom. Hauv Canada, paradichlorobenzene yog siv los ua huab cua freshener, tso zis deodorizer thiab moth repellant. Xyoo 2005, Lub Xeev Pawg Saib Xyuas Kev Tiv Thaiv Ib puag ncig tau rov kho cov qauv tshuaj tua kab tawm hauv xyoo 1999, thiab "Technical Requirements for Environmental Labeling Products Safety Insect Repellents" ib zaug ntxiv qhia meej tias cov tshuaj tua kab "yuav tsum tsis txhob siv naphthalene thiab naphthalene hauv kev tsim khoom. p-dichlorobenzene txheej txheem. Txawm li cas los xij, "Technical Requirements for Environmental Labeling Products Safe Moth Moth Repellents" yog tus qauv pom zoo thiab muaj feem xyuam rau Tuam Tshoj ib puag ncig daim ntawv pov thawj cov khoom pov thawj. Yog li ntawd, "paradichlorobenzene" yog cov tshuaj tua kab kom huv thiab tuaj yeem siv rau hauv cov pob txha. Txawm li cas los xij, lo lus "tsis muaj tshuaj lom" yuav tsum tau muab cim rau ntawm qhov pom tseeb ntawm cov khoom ntim khoom.
