Synthesis of potassium sulfide

Preparation of potassium sulfide

By treating potassium hydroxide with an excess of hydrogen sulfide potassium hydrosulfide (KHS) forms, which with further treatment with the same quantity of potassium hydroxide yields potassium sulfide:

Preparation of potassium sulfide

Preparation of potassium sulfide

Hydrogen sulfide is passed through 3 parts of concentrated potassium hydroxide solution until no further absorption takes place. Then 2 parts of concentrated potassium hydroxide solution is added in order to neutralize potassium hydrosulfide. The rule, however, is to add only two-thirds of the quantity of solution of potassium hydroxide, as it is better the preparation should contain a little potassium hydrosulfide than that free potassium hydroxide should be present. Potassium sulfide should be well protected from air and moisture.

Laboratory manual of inorganic preparations, by H. T. Vulte, 43, 1895





InChI Key


Canonical SMILES


Depositor-Supplied Synonyms

Dipotassium sulfide, 10579-82-5, Dipotassium trisulphide, AC1L4QZC, AC1Q1TTF, Potassium sulphide,crystal, 31R0R7HD0N, EINECS 253-525-4, AR-1I6206, AR-1I6207, RP18989, SC-79326, 12124-92-4

Removed Synonyms

Potassium monosulfide, POTASSIUM SULFIDE, Dipotassium monosulfide, Potassium sulfide (K2S), UNII-31R0R7HD0N, Potassium sulfide (K2(S3)), CID162263, 1312-73-8, 37488-75-8, 430-89-7, 430-93-3

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