Sodium chlorite

Sodium chlorite
The sodium cation	Space-filling model of the chlorite anion
Names
	IUPAC name Sodium chlorite
	Other names Chlorous acid, sodium salt; Textone
Identifiers
CAS Number	7758-19-2 ; 49658-21-1 (trihydrate) ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:78667 ;
ChemSpider	22860 ;
ECHA InfoCard	100.028.942
EC Number	231-836-6;
KEGG	C19523 ;
PubChem CID	23668197;
RTECS number	VZ4800000;
UNII	G538EBV4VF ; F83TIJ81F8 (trihydrate) ;
UN number	1496
CompTox Dashboard (EPA)	DTXSID8021272 ;
	InChI InChI=1S/ClHO2.Na/c2-1-3;/h(H,2,3);/q;+1/p-1 Key: UKLNMMHNWFDKNT-UHFFFAOYSA-M ; InChI=1/ClHO2.Na/c2-1-3;/h(H,2,3);/q;+1/p-1 Key: UKLNMMHNWFDKNT-REWHXWOFAT;
	SMILES [Na+].[O-]Cl=O;
Properties
Chemical formula	NaClO2
Molar mass	90.442 g/mol (anhydrous) ; 144.487 g/mol (trihydrate)
Appearance	white solid
Odor	odorless
Density	2.468 g/cm3, solid
Melting point	anhydrous decomposes at 180–200 °C ; trihydrate decomposes at 38 °C
Solubility in water	75.8 g/100 mL (25 °C) ; 122 g/100 mL (60 °C)
Solubility	slightly soluble in methanol, ethanol
Acidity (pKa)	10-11
Structure
Crystal structure	monoclinic
Thermochemistry
Std enthalpy of; formation (ΔfH⦵298)	-307.0 kJ/mol
Pharmacology
ATC code	D03AX11 (WHO)
Hazards
	Occupational safety and health (OHS/OSH):
Ingestion hazards	Category 3
Inhalation hazards	Category 2
Eye hazards	Category 1
Skin hazards	Category 1B
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H272, H301, H310, H314, H330, H400
Precautionary statements	P210, P220, P221, P260, P262, P264, P270, P271, P273, P280, P284, P301+P330+P331, P303+P361+P353, P305+P351+P338, P310, P361, P363, P370+P378, P391, P403+P233, P405, P501
NFPA 704 (fire diamond)	2 0 1 OX
Flash point	Non-flammable
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	350 mg/kg (rat, oral)
Safety data sheet (SDS)	SDS
Related compounds
Other anions	Sodium chloride; Sodium hypochlorite; Sodium chlorate; Sodium perchlorate
Other cations	Potassium chlorite; Barium chlorite
Related compounds	Chlorine dioxide; Chlorous acid
	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

Sodium chlorite (NaClO₂) is a chemical compound used in the manufacturing of paper and as a disinfectant.