Sodium hydrogen sulfite
E222, sodium bisulphite
3D model (JSmol)
|E number||E222 (preservatives)|
CompTox Dashboard (EPA)
|Molar mass||104.061 g/mol|
|Odor||Slight sulfurous odor|
|Melting point||150 °C (302 °F; 423 K)|
|Boiling point||315 °C (599 °F; 588 K)|
|42 g/100 mL|
Refractive index (nD)
|EU classification||Harmful (Xn)|
|S-phrases||(S2), S25, S46|
exposure limit (PEL)
|Other anions||Sodium sulfite|
|Other cations||Potassium bisulfite|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|verify (what is ?)|
Sodium bisulfite, also known as sodium hydrogen sulfate, is a chemical compound. Its chemical formula is NaHSO3. It is made of sodium and bisulfite ions. It is a white solid with an odor of sulfur dioxide. It can be made by reacting smaller amounts of sodium dioxide and sodium hydroxide or sodium bicarbonate. If too much sodium hydroxide is used, sodium disulfite is made instead.
Related pages[change | change source]
References[change | change source]
- ↑ NIOSH Pocket Guide to Chemical Hazards. "#0561". National Institute for Occupational Safety and Health (NIOSH).