Sodium hydrosulfite. Lub cev thiab tshuaj zog. daim ntawv thov

Sodium hydrosulfite - yog ib tug inorganic compound, ib tug hlau ntsev ntawm ib tug acidic sodium thiab sulfurous acid preservative (E222) thiab ib tug antioxidant. Nws tau dawb zog. Nws muaj cov nram qab tshuaj mis: NaHSO3.

Lub cev thaj chaw ntawm sodium hydrosulfite:

1. Nws yog ib tug dawb hmoov muaj ib tug tsis muaj zog grayish zas.
2. hniav puas loj ntawm 104.061 g / mol, ceev - 1,48 g / santimetr³.
3. Cov melting point yog 150 degrees centigrade.
4. Nws yog npaj meej soluble nyob rau hauv dej (H2O) thiab dilute alkalis.

Cov tshuaj thaj chaw ntawm sodium hydroxide:

1. decompose thaum rhuab:

2NaHSO3 (sodium hydrosulfite) = Na2SO3 (sodium sulfite) + SO2 (leej faj dioxide yog tso tawm raws li ib tug gas) + H2O (dej)

2. decomposed acids:

HCl + NaHSO3 (hydrochloric acid) = NaCl (sodium tshuaj dawb) + SO2 (leej faj dioxide) + H2O (dej)

3. decomposed alkalis:

NaHSO3 + NaOH (hydroxide) = Na2SO3 (sodium sulfite) + H2O (dej)

4. Oxidized oxygen:

+ O2 = 4NaHSO3 2Na2SO4 (sodium sulfate) + 2SO2 (leej faj dioxide, suab) + H2O (dej)

Yuav ua li cas kom tau sodium hydrosulfite?

nram qab no txoj kev yuav ua tau kom muab tau cov tshuaj yeeb dej caw:

1. Los ntawm cov tshuaj tiv thaiv ntawm sodium hydroxide nrog ib tug oxide ntawm cov leej faj:
NaOH (sodium puag) + SO2 (leej faj oxide) = NaHSO3 (sodium hydrosulfite)

2. Los ntawm cov tshuaj tiv thaiv (ntawm chav tsev kub) ntawm sodium dithionite nrog dej thiab hydrochloric acid:
2Na2S2O4 (sodium dithionite) + H2O (dej) + HCl (hydrochloric acid) = 2NaHSO3 (sodium hydrosulfite) + S (leej faj, precipitate raws li ib tug) + NaCl (sodium tshuaj dawb)

3. Los ntawm txhais tau tias ntawm ib tug tshuaj tiv thaiv nyob rau hauv uas ua num ua ke sodium dithionite, dej thiab cov pa:
2Na2S2O4 (sodium dithionite nyob rau hauv diluted daim ntawv no) + 2H2O (dej) + O2 (oxygen) = 4NaHSO3 (sodium hydrosulfite)

Kev siv ntawm sodium hydrosulfite:

- lub teeb, cov tshuaj lom thiab lwm yam lag luam;

- nyob rau hauv cov zaub mov kev lag luam yog siv raws li ib tug antioxidant los yog ib tug preservative;

- siv nyob rau hauv yuav luag tag nrho cov wines npaj rau export (tshuaj thaj chaw ntawm sodium hydrosulfite nyob rau hauv cov ntaub ntawv no yuav pab kom cov los mus tiv thaiv oxidation thiab khaws cia rau lub saj ntawm cov dej haus);

- yog siv rau canning txiv hmab txiv ntoo mus tua cov kab mob thiab tiv thaiv kom txhob browning;

- nyob rau hauv dyeing thiab dawb sib txawv ntaub so ntswg yog siv raws li lub preservative;

- mus tshem tawm cov reactive dyes nyob rau hauv lub dyeing txheej txheem ntawm paj rwb;

- rau dyeing polyesters rau reductive purification;

- raws li cov preservative nyob rau hauv lub tshuaj dawb tso ntawm fabrics thiab raws li ib tug txo neeg sawv cev rau vat dyes;

- nyob rau hauv Biochemical Engineering yog siv nyob rau hauv thiaj li yuav tswj co tej yam kev mob nyob rau hauv lub reactor.

Sodium hydrosulfite yog tshuaj lom rau tib neeg?

peb muaj cov tshuaj yeeb dej caw nyob rau hauv lo lus nug nyob rau hauv ntev ntau yuav ua rau tsis haum tshuaj loj. Nrog kaum cuaj eightieth xyoo NaHSO3 (raws li poov tshuaj bisulfite, E 228) yog txwv tsis pub nyob rau hauv lub tebchaws United States siv nyob rau nyoos txiv hmab txiv ntoo thiab zaub tom qab ib tug xov tooj ntawm tus neeg mob, kev tuag. sodium hydrosulfite ua ntau yam kab mob ntawm lub digestive system. Raws li cov EU qhia rau yam tshuaj uas yog txaus ntshai rau tib neeg, E 222 additive belongs rau cov pab pawg neeg ntawm tej tshuaj. Nyob rau hauv Ukraine, lub Lavxias teb sab Federation thiab cov yam khoom uas yog tau kev tso cai rau kev siv tsuas nrog nruj ua kevcai nco txog technology.

Kev siv ntawm sodium bisulfate nyob rau hauv cov zaub mov kev lag luam

Qhov no cov ntaub ntawv uas yog siv nyob rau hauv cov zaub mov kev lag luam hu ua E 222. Qhov no zaub mov ntxiv hluavtaws keeb kwm muaj ib theem siab ntawm kev txaus ntshai. Nyob rau hauv lub ntev systematic siv ua rau muaj mob loj rau lub cev. Vim cov cuab yeej rau inhibit tu tub tu kiv thiab kev loj hlob ntawm kab mob thiab cov kab mob siv raws li ib tug antioxidant thiab ib tug preservative. Nyob rau hauv ib tug acidic puag ncig nrog sodium sulfite decomposes rau leej faj uas muaj tebchaw thiab leej faj nws tus kheej.

Thawj pab rau lom

Nws yog pom zoo kom so thiab kom sov, qhuav thiab huv si khaub ncaws, raws li zoo raws li huab cua ntshiab. Ntawm daim tawv nqaij thiab ob lub qhov muag yuav tsum tau rinsed nrog dej txias. Nrog kub yus yuav tsum kom aseptic ntaub qhwv. Tom ntej no, hu rau ib tug tsheb thauj neeg mob.