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1.05134

Potassium sulfide

small lumps for analysis EMSURE®

Synonym(s):

Potassium sulfide, Potassium monosulfide

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About This Item

Linear Formula:
(l · K2S)(m · K2Sx)(n · K2S2O3)
CAS Number:
39365-88-3
NACRES:
NA.21
UNSPSC Code:
12352302
MDL number:
MFCD00064604
Grade:
reagent grade
Form:
solid
Solubility:
500 g/L
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Quality Level

300

grade

reagent grade

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

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

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form

solid

form

solid

form

solid

form

solid

solubility

500 g/L

solubility

111 g/L

solubility

water: soluble (120 g/l)

solubility

1600 g/L

Quality Level

300

Quality Level

100

Quality Level

300

Quality Level

300

grade

reagent grade

grade

-

grade

ACS reagent

grade

reagent grade

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)

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%

pictograms

CorrosionEnvironment
GHS05,GHS09

signalword

Danger

Hazard Classifications

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

supp_hazards

EUH031

Storage Class

8A - Combustible, corrosive hazardous materials

wgk

WGK 3

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Global Trade Item Number

SKUGTIN
105134100004022536061580
105134025004022536061573

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