Potassium dithionite

{{chembox

| Watchedfields = changed

| verifiedrevid = 451933819

| Name = Potassium dithionite

| ImageFile = Potassium dithionite.svg

| ImageSize = 200px

| ImageName = Chemical structure of potassium dithionite

| ImageAlt = Chemical structure of potassium dithionite

| IUPACName =

| OtherNames =

|Section1={{Chembox Identifiers

| CASNo = 14293-73-3

| CASNo_Ref = {{cascite|correct|CAS}}

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = 0B8I49QLG5

| CASNoOther =

| PubChem = 61726

| SMILES = [O-]S(=O)S(=O)[O-].[K+].[K+]

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 55625

| InChI = 1/2K.H2O4S2/c;;1-5(2)6(3)4/h;;(H,1,2)(H,3,4)/q2*+1;/p-2

| InChIKey = HEZHYQDYRPUXNJ-NUQVWONBAU

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChI = 1S/2K.H2O4S2/c;;1-5(2)6(3)4/h;;(H,1,2)(H,3,4)/q2*+1;/p-2

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = HEZHYQDYRPUXNJ-UHFFFAOYSA-L

| MeSHName =

}}

|Section2={{Chembox Properties

| Formula = K₂O₄S₂

| MolarMass = 206.32 g/mol

| Appearance = light yellow powder

| Density =

| MeltingPt =

| BoilingPt =

| Solubility =

}}

|Section3={{Chembox Hazards

| MainHazards =

| FlashPt =

| AutoignitionPt =

| GHS_ref =

}}

}}

Potassium dithionite or potassium hydrosulfite is a potassium salt of dithionous acid.

The compound has UN number UN 1929. As a dithionite, it is closely related to sodium dithionite, which is a commonly used reducing agent and bleaching agent.