:Sodium thiocyanate

{{chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 476996662

| ImageFile = Sodium thiocyanate.png

| ImageSize = 160px

| ImageFileL1 = Sodium-3D.png

| ImageNameL1 = The sodium cation

| ImageFileR1 = Thiocyanate-3D-vdW.png

| ImageSizeR1 = 140px

| ImageNameR1 = The thiocyanate anion (space-filling model)

| ImageFile2 = Sodium thiocyanate.jpg

| IUPACName = Sodium thiocyanate

| OtherNames = Sodium rhodanide
Sodium sulfocyanate
Sodium rhodanate
Thiocyanic acid, sodium salt

|Section1={{Chembox Identifiers

| CASNo = 540-72-7

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

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

| ChemSpiderID = 10443

| Beilstein = 3594965

| ChEBI_Ref = {{ebicite|correct|EBI}}

| ChEBI = 30952

| ChEMBL_Ref = {{ebicite|correct|EBI}}

| ChEMBL = 1644028

| ChEMBL2_Ref = {{ebicite|correct|EBI}}

| ChEMBL2 = 84336

| ChEMBL3_Ref = {{ebicite|correct|EBI}}

| ChEMBL3 = 1078613

| Gmelin = 1249825

| PubChem = 516871

| EINECS = 208-754-4

| RTECS = XL2275000

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

| UNII = 5W0K9HKA05

| SMILES = [Na+].[S-]C#N

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

| StdInChI = 1S/CHNS.Na/c2-1-3;/h3H;/q;+1/p-1

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

| StdInChIKey = VGTPCRGMBIAPIM-UHFFFAOYSA-M

| InChIKey1 = VGTPCRGMBIAPIM-UHFFFAOYSA-M

| InChI = 1S/CHNS.Na/c2-1-3;/h3H;/q;+1/p-1

| InChIKey = VGTPCRGMBIAPIM-REWHXWOFAB

}}

|Section2={{Chembox Properties

| Formula = NaSCN

| MolarMass = 81.072 g/mol

| Appearance = deliquescent colorless crystals

| Density = 1.735 g/cm³

| MeltingPtC = 287

| BoilingPtC = 307

| BoilingPt_notes = decomposes

| Solubility = 139 g/100 mL (21 °C)
225 g/100 mL (100 °C)

| SolubleOther = soluble in acetone, alcohols, ammonia, SO₂

| Solvent =

| pKa = −1.28

| RefractIndex = 1.545

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|Section3={{Chembox Structure

| CrystalStruct = orthorhombic

}}

|Section5={{Chembox Thermochemistry

| DeltaHf =

}}

|Section7={{Chembox Hazards

| ExternalSDS = [http://www.inchem.org/documents/icsc/icsc/eics0675.htm ICSC 0675]

| NFPA-H = 2

| NFPA-F = 0

| NFPA-R = 0

| NFPA-S =

| GHSPictograms = {{GHS05}}{{GHS07}}

| GHSSignalWord = Danger

| HPhrases = {{H-phrases|302|312|332|412}}

| PPhrases = {{P-phrases|261|264|270|271|273|280|301+312|302+352|304+312|304+340|305+351+338|310|312|322|330|337+313|363|501}}

| FlashPt =

| PEL =

| LD50 = 764 mg/kg (oral, rat)[http://chemicalland21.com/industrialchem/organic/SODIUM%20THIOCYANATE.htm Sodium thiocyanate], chemicalland21.com

}}

|Section8={{Chembox Related

| OtherCations = Lithium thiocyanate
Potassium thiocyanate
Ammonium thiocyanate

| OtherAnions = Sodium cyanate
Sodium cyanide

}}

}}

Sodium thiocyanate (sometimes called sodium sulphocyanide) is the chemical compound with the formula NaSCN. This colorless deliquescent salt is one of the main sources of the thiocyanate anion. As such, it is used as a precursor for the synthesis of pharmaceuticals and other specialty chemicals.{{cite book | author = Schwan, A. L. | title = Encyclopedia of Reagents for Organic Synthesis | year = 2001 | publisher = John Wiley & Sons | location = New York | doi = 10.1002/047084289X.rs109}} Thiocyanate salts are typically prepared by the reaction of cyanide with elemental sulfur:

:8 NaCN + S₈ → 8 NaSCN

Sodium thiocyanate crystallizes in an orthorhombic cell. Each Na⁺ center is surrounded by three sulfur and three nitrogen ligands provided by the triatomic thiocyanate anion.{{cite journal | last1 = van Rooyen | first1 = P. H. | last2 = Boeyens | first2 = J. C. A. | author2-link = Jan C. A. Boeyens | title = Sodium thiocyanate | journal = Acta Crystallographica | year = 1975 | volume = B31 | issue = 12 | pages = 2933–2934 | doi = 10.1107/S0567740875009326| doi-access = free | bibcode = 1975AcCrB..31.2933V }} It is commonly used in the laboratory as a test for the presence of Fe³⁺ ions.