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12665

Sigma-Aldrich

Potassium (poly)sulfide

≥42% K2S basis

Synonym(s):

Potassium polysulfide

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100 G
€46.40
1 KG
€120.00
6 X 1 KG
€579.00
20 KG
€1,930.00

€46.40

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100 G
€46.40
1 KG
€120.00
6 X 1 KG
€579.00
20 KG
€1,930.00

About This Item

Linear Formula:
K2S/n
CAS Number:
37199-66-9
EC Number:
253-390-1
MDL number:
MFCD00148074
UNSPSC Code:
12352302
NACRES:
NA.22
form:
solid

€46.40

Please contact Customer Service for Availability
Request a Bulk Order

Quality Level

100

form

solid

concentration

≥42% (K2S)

SMILES string

[K+].S

InChI

1S/K.H2S/h;1H2/q+1;

InChI key

ZOCLAPYLSUCOGI-UHFFFAOYSA-N

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Application

Potassium polysulfide shows high aqueous solubility and can act as high energy density half-cells for secondary electrochemical storage systems.[1] It can be used as a sulfur source for synthesizing sulfur nanoparticles.[2]

Signal Word

Danger

Hazard Statements

H252,H314,H335,H400

Hazard Classifications

Aquatic Acute 1 - Eye Dam. 1 - Self-heat. 2 - Skin Corr. 1B - STOT SE 3

Target Organs

Respiratory system

Supplementary Hazards

EUH031

Storage Class Code

4.2 - Pyrophoric and self-heating hazardous materials

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
STBL3364
STBL0756
STBK7635
STBK3100
STBK1154

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An energetic medium for electrochemical storage utilizing the high aqueous solubility of potassium polysulfide.
Licht S.
Journal of the Electrochemical Society, 134(9), 2137-2141 (1987)
Production of sulfur nanoparticles from aqueous solution of potassium polysulfide.
Massalimov I A, et al.
Russian Journal of Applied Chemistry, 85(12), 1832-1837 (2012)

Questions

1–2 of 2 Questions  

  1. How do I interpret the :"≥42% K2S basis" purity? Is the remaining 58% an unknown distribution of polysulfides and sulfur or is there also an unknown quantity of water?

    1 answer

    1. The purity statement of "≥42% K2S basis" indicates that at least 42% of this product is potassium sulfide (K2S). The remaining 58% primarily consists of polysulfides and sulfur, with a smaller amount of water present. Thus, the majority of the remaining composition is likely polysulfides and sulfur, while water constitutes a minority portion.

      Helpful?

  2. My laboratory has bought this Potassium (poly)sulfide to form an electrolite to be used in nanoparticle based solar cells. I can’t find a way to make such a solution in papers. Previously this solution had been done with 0.5M Na2S and 0.1M S.

    1 answer

    1. Unfortunately, the solubility of this product is not tested. There are some references papers regarding the preparation of potassium (poly)sulfide electrolyte for batteries that may be helpful:
      https://www.nature.com/articles/s41467-024-45405-w
      https://www.nature.com/articles/s41560-023-01370-0

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