Sodium hydrosulfite. Physical futhi amakhemikhali izakhiwo. isicelo

Sodium hydrosulfite - kuyinto kwakwakhe wezinto ezingaphili, usawoti metal i-sodium esidi sulfurous acid uyakulondoloza (E222) futhi i antioxidant. Kuye mhlophe izakhiwo. It has the chemical fomula elandelayo: NaHSO3.

Izakhiwo sodium hydrosulfite:

1. Kuyinto powder emhlophe kokuba tint ababuthakathaka lemicu empunga elinamathela othini.
2. mass izinyo lomhlathi of 104.061 g / Mol, ukuminyana - 1.48 g / santimetr³.
3. lokuncibilika kwaba degrees 150 centigrade.
4. Kuyinto kalula oncibilikayo emanzini (H2O) futhi alulaze alkalis.

I nezakhi ezithile zamakhemikhali sodium hydroxide:

1. ukubola lapho ukufuthelana:

2NaHSO3 (i-sodium hydrosulfite) = Na2SO3 (i-sodium sulfite) + SO2 (sulphur dioxide ukhululeka njengendlela gas) + H2O (amanzi)

2. acid ukubola:

HCl + NaHSO3 (hydrochloric acid) = NaCl (sodium chloride) + SO2 (sulphur dioxide) + H2O (amanzi)

3. alkalis ukubola:

NaHSO3 + NaOH (hydroxide) = Na2SO3 (i-sodium sulfite) + H2O (amanzi)

4. oxidized-mpilo:

+ O2 = 4NaHSO3 2Na2SO4 (i-sodium sulfate) + 2SO2 (i-sulphur dioxide, iyasha) + H2O (amanzi)

Uyithola kanjani i-sodium hydrosulfite?

zindlela ezilandelayo kungaba ukuthola imfuyo;

1. Ngendlela esisabela sodium hydroxide nge-nitrous sulphur:
NaOH (i-sodium isizinda) + SO2 (sulphur oxide) = NaHSO3 (i-sodium hydrosulfite)

2. ngu ukusabela (ekamelweni lokushisa) sodium dithionite ngamanzi hydrochloric acid:
2Na2S2O4 (i-sodium dithionite) + H2O (amanzi) + HCl (hydrochloric acid) = 2NaHSO3 (i-sodium hydrosulfite) + S (sulphur, kwenze njengoba) + NaCl (sodium chloride)

3. Esebenzisa yokusabela lapho kuwuthinta sodium dithionite, amanzi kanye nowe-oxygen:
2Na2S2O4 (i-sodium dithionite ngefomu buhlanjululwe) + 2H2O (amanzi) + O2 (i-oksijini) = 4NaHSO3 (i-sodium hydrosulfite)

Ukusetshenziswa sodium hydrosulfite:

- ukukhanya, zamakhemikhali nezinye izimboni;

- embonini yezokudla isetshenziswa njengenhlangano antioxidant noma uyakulondoloza

- esetshenziswa cishe zonke iwayini senzelwe ukuthekelisa (chemical izakhiwo sodium hydrosulfite kulokhu kusiza ukuvimbela namachibi futhi alondoloze ukunambitheka isiphuzo);

- isetshenziselwa ukuwafaka izithelo ukulwa namagciwane futhi kuvimbele Browning;

- e ukudaya futhi mhlophe kwezicubu ezahlukene isetshenziswa njengoba uyakulondoloza

- ukususa udayi esisheshayo enqubeni nokudaya ukotini;

- olungele ukudaya polyesters zokuhlanzwa reductive;

- njengoba uyakulondoloza ku amakhorali izindwangu futhi njengendlela agent ekunciphiseni ngoba wesikhamo udayi;

- e kwamakhemikhali Engineering isetshenziswa ukuze silondoloze izimo anaerobic ku ophendulayo.

Sodium hydrosulfite kuyinto ezinobuthi ezingaba yingozi kubantu?

esinalo ketshezi embuzweni lokuhlala ngokweqile kungabangela ukusabela kabi komzimba nomzimba. Nge nesishiyagalolunye ayisishiyagalombili ngonyaka NaHSO3 (potassium bisulfite, E 228) akuvunyelwe e-United States ukusetshenziswa izithelo eluhlaza kanye nemifino ngemuva eziningi, ukufa. sodium hydrosulfite kubangela izifo ezihlukahlukene isimiso sokugaya ukudla bungene. Ngokusho nesiqondiso EU izinto eziyingozi ukuze abantu, E 222 okufakiwe kungokwalabo iqembu ayingozi. E-Ukraine, Russian Federation futhi ketshezi egunyazwe ukusetshenziswa kuphela nokugcina esiqinile ubuchwepheshe.

Ukusetshenziswa sodium bisulfate embonini yezokudla

Le nto obusetshenziswa embonini ukudla okuthiwa E 222. Lokhu ukudla engeza zokwenziwa umsuka kokuba ezingeni lelisetulu ingozi. Ngo ukusetshenziswa ehlelekile eside kubangela umonakalo omkhulu emzimbeni. Ngenxa impahla ekuvimbeleni ukukhiqizwa kabusha kanye nokukhula nezilwanyana ezincane namagciwane sisetshenziswe njengesigungu sokufaka antioxidant futhi uyalondoloza. Endaweni esidi ne-sodium sulfite ubola ukuba compounds sulphur-aqukethe nesibabule uqobo.

Usizo lokuqala for ubuthi

Kunconywa ukuba baphumule futhi ugcine izingubo ezifudumele, omile futhi ahlanzekile, kanye nomoya opholile. Skin namehlo kufanele siyakazwe ngamanzi. Nge ukusha kumelwe abeke ngebhandeshi aseptic. Okulandelayo, shayela i-ambulense.