Ammonium sulfite

Ammonium sulfite
Names
	IUPAC name Ammonium sulfite
	Other names Ammonium sulphite, Diammonium sulfite, Diammonium sulfonate, Sulfurous acid, Diammonium salt, Sulfurous acid, ammonium salt(1:2)
Identifiers
CAS Number	10196-04-0 ;
3D model (JSmol)	Interactive image; Interactive image;
ChemSpider	23404 ;
ECHA InfoCard	100.030.428
EC Number	233-484-9;
PubChem CID	25041;
UNII	8LF589Y5GD ;
UN number	3077
CompTox Dashboard (EPA)	DTXSID2064991 ;
	InChI InChI=1S/2H3N.H2O3S/c;;1-4(2)3/h2*1H3;(H2,1,2,3) Key: PQUCIEFHOVEZAU-UHFFFAOYSA-N ;
	SMILES [H][N+]([H])([H])[H].[H][N+]([H])([H])[H].O=S([O-])[O-]; [O-]S([O-])=O.[NH4+].[NH4+];
Properties
Chemical formula	(NH4)2SO3
Molar mass	116.14 g/mol
Appearance	colourless hygroscopic crystals
Melting point	65 °C (149 °F; 338 K) decomposes
Solubility in water	35 g/100 mL 32.4g/100mL at 0 degrees Celsius 60.4g/100mL at 100 degrees Celsius
Solubility	Insoluble in acetone and alcohol
Refractive index (nD)	1.515.
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H314
Precautionary statements	P260, P264, P280, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P332+P313, P337+P313, P362, P363, P405, P501
NFPA 704 (fire diamond)	2 0 0
Flash point	Not Flammable
Related compounds
Other anions	Ammonium hydroxide Ammonium thiosulfate Ammonium sulfate Ammonium bisulfate Ammonium persulfate
Other cations	Sodium sulfite; Potassium sulfite
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Ammonium sulfite is the ammonium salt of sulfurous acid with the chemical formula (NH₄)₂SO₃.