2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Koj tuaj yeem yuav tetrahydrofuran - feem ntau hu ua THF - los ntawm peb lub khw muag tshuaj hauv online hauv 2.5L thiab 25L ntim. Cov khoom no yog muag nrog ntau tshaj 99% purity theem thiab tsawg dua 0.05% dej.
Qhov txawv ntawm furan thiab tetrahydrofuran yog dab tsi?
Dab tsi txog qhov "-furan" ntawm lub npe tetrahydrofuran? Qhov no qhia peb tias nws yog ib qho derivative, los yog npawg, ntawm nws niam txiv molecule, furan. THF tsuas yog txawv ntawm qhov tseeb tias ob daim ntawv cog lus tau raug tshem tawm thiab hloov nrog plaub hydrogen atoms.
Kuv yuav tshem tawm tetrahydrofuran li cas?
Tetrahydrofuran yog cov tshuaj khib nyiab pov tseg uas tej zaum yuav raug pov tseg qhov kawg los ntawm controlled incineration. Hauv kev tswj cov khib nyiab uas muaj peroxides, perforation ntawm lub thawv ntawm cov khib nyiab tsim ib qho kev nyab xeeb nyob deb yog ua raws li qhib qhov cub.
Yog THF nyab xeeb?
Tetrahydrofuran tuaj yeem ua rau mob taub hau, xeev siab thiab kiv taub hau. Kev raug mob siab heev tuaj yeem ua rau tsis nco qab thiab tuag. Tetrahydrofuran tuaj yeem ua rau lub siab thiab lub raum puas. Tetrahydrofuran yog cov kua roj tsw qab thiab muaj hluav taws kub txaus ntshai.
Puas yog THF lom?
Tus mob toxicity ntawm THF qis rau nruab nrab los ntawm txhua txoj kev. Irreversible corrosive puas rau lub qhov muag tuaj yeem tshwm sim los ntawm kev sib cuag ncaj qha. Txawm li cas los xij, THF tsis yog daim tawv nqaij khaus, lossis sensitizer. Kev tshawb fawb hauv vitro thiab hauv vivo tau pom tias THF tsis yog mutagenic.
Pom zoo:
Thaum twg kuv tuaj yeem tuaj yeem mus rau Tebchaws Yelemees?
Yog. Rau Lub Rau Hli 20, 2021, cov neeg nyob hauv Tebchaws Meskas tau tso cai nkag tebchaws Yelemes rau txhua lub hom phiaj. Kev Sau Npe Digital ntawm Kev Nkag Nkag: Cov neeg nkag mus hauv lub tebchaws Yelemes uas tau siv sijhawm nyob rau hauv RKI-tsim muaj kev pheej hmoo siab lossis kab mob sib txawv hauv 10 hnub ua ntej nkag yuav tsum xa daim ntawv sau npe digital ntawm kev nkag.
Kuv puas tuaj yeem tso kuv tus dev tsis tuaj yeem?
Nco ntsoov tshem koj tus dev lub dab tshos, tshwj xeeb tshaj yog tias koj muaj cov cim rau ntawm nws, kom paub tseeb tias tsis muaj dab tsi tuaj yeem ntes tau ntawm lub crate. … Txawm li cas los xij, tsuas yog peb tus dev xwb, uas peb tso siab tau tag nrho.
Yuav ua li cas zom kuv tuaj yeem muab rau kuv tus menyuam dev?
Tsis zoo li cov khoom ua si, chews yog tsim los rau nibbling thiab gnawing thiab yog qhov tseem ceeb yog tias koj xav kom koj tus menyuam dev zom cov khoom siv tau los ntawm koj lub rooj tog! Piv txwv ntawm chews muaj xws li cov hniav txhuam hniav, nias zais thiab rawhide twists.
Kuv puas tuaj yeem rov qab kuv lub tsheb yog tias kuv tsis nyiam?
Yog koj tsis nyiam lub tsheb, koj tuaj yeem pauv nws rau ib qho koj nyiam lossis tau txais nyiaj rov qab. Tsis tas li ntawd xwb, qee lub chaw muag khoom muaj kev pauv pauv uas koj muaj tsawg hnub los pauv tsheb. Kuv puas tuaj yeem rov qab tsheb yog tias kuv tsis txaus siab?
Kuv puas tuaj yeem them kuv tus tswv tsev pov hwm kuv tus kheej?
kev tuav pov hwm tsev ib txwm suav nrog kev them nyiaj rau kev puas tsuaj ntawm khoom ntiag tug, khoom muaj nqis thiab kev lav phib xaub. Cov qauv qiv nyiaj hauv tsev tsis yog tsuas yog koj cov nyiaj qiv thiab cov paj laum xwb, tab sis kuj tseem them nyiaj rau koj cov ntawv pov hwm thiab se vaj tse.
