Potassium sulfide stood for by the chemical formula K2S is a compound of potassium and sulhair that is moderately soluble in acids <1>. It is deliquescent and may spontaneously ignite in air. It is a reducing agent and an ionic compound <4>.

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Potassium Sulfide

Potassium Sulfide Identification

CAS Number1312-73-8 <1>
PubChem CID20072150 <3>
ChemSpider ID142491 <2>
EC Number215-197-0 <1>

Complace and Synthesis

Potassium sulfide deserve to be ready by initially dealing with potassium hydroxide to excess hydrogen sulfide to form potassium hydrosulfide (KHS). Further therapy of KHS through the very same amount of potassium hydroxide geneprices potassium sulfide <9>.

KOH + H2S = KHS + H2O


Potassium Sulfide Formula

Properties and also Characteristics of Potassium Sulfide

General Properties

Molar mass/molecular weight71.158 g/mol <3>

Physical Properties

Color/appearanceWhite to yellow powder <4>
Melting point/freezing point840°C, 1544°F <1>
Boiling point912°C, 1674°F <1>
Density 1.80 g cm-3 <1>
State of matter at room temperature (normal phase)Solid <1>

Chemical Properties

Solubility in waterN/A <1>
pH>7 (basic) <5>

Atomic Properties

Crystal structureTetrahedral <6>


Potassium Sulfide Structure


Lewis Dot Structure for Potassium Sulfide

Prominent Reactions of K2S

Potassium sulfide reacts with cobalt iii bromide to create cobalt iii sulfide and potassium bromide <10>.

3K2S + 2CoBr3 = Co2S3 + 6KBr

Potassium sulfide reacts with dilute hydrochloric acid to develop potassium chloride and hydrogen sulfide <11>.

K2S + 2HCl = 2 KCl + H2S

It reacts with focused sulfuric acid to offer potassium bisulfate, sulhair dioxide, sulhair and water <13>

K2S + 3H2SO4 = 2KHSO4 + SO2 + S + 2H20

The compound reacts with silver nitrate to form aqueous potassium nitrate and silver sulfide precipitate <12>.

K2S + 2AgNO3 = 2KNO3 + Ag2S

Potassium Sulfide Uses

In pyrotechnics <7>.As a reagent in analytical chemisattempt <4>.As a depilatory and medication <4>.

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Is It Dangerous

It might reason a fire hazard, so prealerts should be taken not to carry it in call through air. In the form of powder or dust, it is explosive. Ingestion, inhalation and also skin contact may cause severe injury and even fatality. It also harmtotally affects the eyes and also skin resulting in eye damages and skin burns. Hence all contact have to be avoided. It emits toxic fumes if heated to decomplace <4>. It is of a corrosive nature and poisonous for the environment <8>.