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1.05134

Supelco

Potassium sulfide

small lumps for analysis EMSURE®

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Synonym(s):
Potassium sulfide, Potassium monosulfide
Linear Formula:
(l · K2S)(m · K2Sx)(n · K2S2O3)
CAS Number:
MDL number:

Quality Level

product line

EMSURE®

form

solid

concentration

≥44% (complexometric K2S basis)

pH

13 (20 °C, 10 g/L in H2O)

mp

200-250 °C

solubility

500 g/L

density

1.65 g/cm3 at 20 °C

bulk density

1000‑1200 kg/m3

anion traces

sulfite (SO32-): ≤1%
thiosulfate (S2O32-): ≤20

cation traces

N: ≤0.01%

storage temp.

no temp limit

InChI

1S/4K.H2O3S2.S/c;;;;1-5(2,3)4;/h;;;;(H2,1,2,3,4);/q;;2*+1;;/p-2

InChI key

PFSBHPPVZHPSCB-UHFFFAOYSA-L

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Potassium sulfide small lumps for analysis EMSURE®

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pH

13 (20 °C, 10 g/L in H2O)

pH

5.5-8.5 (20 °C, 50 g/L in H2O)

pH

5.5-8.5 (20 °C, 50 g/L in H2O)

pH

9 (20 °C, 10 g/L in H2O)

mp

200-250 °C

mp

1069 °C

mp

1069 °C

mp

-

solubility

500 g/L

solubility

111 g/L

solubility

-

solubility

1600 g/L

density

1.65 g/cm3 at 20 °C

density

2.66 g/cm3 at 20 °C

density

2.66 g/cm3 at 20 °C

density

2.44 g/cm3 at 20 °C

anion traces

sulfite (SO32-): ≤1%, thiosulfate (S2O32-): ≤20

anion traces

-

anion traces

chloride (Cl-): ≤0.0005%

anion traces

chloride (Cl-): ≤0.003%, sulfate (SO42-): ≤0.005%

Analysis Note

Assay (complexometric, as K₂S): ≥ 44 %
Sulfite (SO₃): ≤ 1 %
Thiosulfate (S₂O₃): about 20
Total nitrogen (N): ≤ 0.01 %

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

Pictograms

CorrosionEnvironment

Signal Word

Danger

Hazard Statements

Hazard Classifications

Aquatic Acute 1 - Eye Dam. 1 - Skin Corr. 1B

Supplementary Hazards

Storage Class Code

8A - Combustible, corrosive hazardous materials

WGK

WGK 3


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