Back بيكبريتيت الصوديوم Arabic Natrium bisulfit Azerbaijani سودیوم بی‌سولفیت AZB Hidrogensulfit de sodi Catalan Hydrogensiřičitan sodný Czech Natriumhydrogensulfit German Natria bisulfito Esperanto Bisulfito sódico Spanish سدیم بی‌سولفیت Persian Natriumvetysulfiitti Finnish

Sodium bisulfite

Not to be confused with Sodium bisulfate.
Sodium bisulfite
Ball-and-stick model of a bisulfite anion (left) and a sodium cation (right)
Names
IUPAC name
Sodium hydrogen sulfite
Other names
  • E222
  • sodium bisulphite
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.028.680 Edit this at Wikidata
E number E222 (preservatives)
RTECS number
  • VZ2000000
UNII
  • InChI=1S/Na.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+1;/p-1 checkY
    Key: DWAQJAXMDSEUJJ-UHFFFAOYSA-M checkY
  • InChI=1/Na.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+1;/p-1
    Key: DWAQJAXMDSEUJJ-REWHXWOFAL
  • [Na+].[O-]S(=O)O
Properties
NaHSO3
Molar mass 104.061 g/mol
Appearance White solid
Odor Slight sulfurous odor
Density 1.48 g/cm3
Melting point 150 °C (302 °F; 423 K)
Boiling point 315 °C (599 °F; 588 K)
42 g/100 mL
1.526
Hazards
GHS labelling:
GHS07: Exclamation mark
H302
P301+P312+P330
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
2
0
1
Flash point Non-flammable
NIOSH (US health exposure limits):
PEL (Permissible)
 none[1]
REL (Recommended)
 TWA 5 mg/m3[1]
IDLH (Immediate danger)
 N.D.[1]
Related compounds
Other anions
 Sodium sulfite
Sodium metabisulfite
Sodium biselenite
Other cations
 Potassium bisulfite
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Sodium bisulfite (or sodium bisulphite, sodium hydrogen sulfite) is a chemical mixture with the approximate chemical formula NaHSO3. Sodium bisulfite is not a real compound,[2] but a mixture of salts that dissolve in water to give solutions composed of sodium and bisulfite ions. It appears in form of white or yellowish-white crystals with an odor of sulfur dioxide. Regardless of its ill-defined nature, sodium bisulfite is used in many different industries such as a food additive with E number E222 in the food industry, a reducing agent in the cosmetic industry, and a decomposer of residual hypochlorite used in the bleaching industry.[3][4][5]

  1. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0561". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ Tudela, David; Jenkins, H. Donald B. (2003). "New Methods to Estimate Lattice Energies: Application to the Relative Stabilities of Bisulfite (HSO3−) and Metabisulfite (S2O52-) Salts". Journal of Chemical Education. 80 (12): 1482. Bibcode:2003JChEd..80.1482T. doi:10.1021/ed080p1482.
  3. ^ Cite error: The named reference :0 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference :1 was invoked but never defined (see the help page).
  5. ^ EFSA Panel on Food additives and Nutrient Sources added to Food (ANS) (2016). "Scientific Opinion on the re-evaluation of sulfur dioxide (E 220), sodium sulfite (E 221), sodium bisulfite (E 222), sodium metabisulfite (E 223), potassium metabisulfite (E 224), calcium sulfite (E 226), calcium bisulfite (E 227) and potassium bisulfite (E 228) as food additives". EFSA Journal. 14 (4). doi:10.2903/j.efsa.2016.4438.
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