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223476

Sigma-Aldrich

Potassium bisulfate

reagent grade

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Synonym(s):
Potassium hydrogen sulfate
Linear Formula:
KHSO4
CAS Number:
Molecular Weight:
136.17
EC Number:
MDL number:
eCl@ss:
38030413
PubChem Substance ID:
NACRES:
NA.21

grade

reagent grade

Quality Level

form

powder or crystals

concentration

35.0-37.0% H2SO4 (titration)

mp

214 °C (lit.)

acid number

35‑37%(as H2SO4)

density

2.32 g/mL at 25 °C (lit.)

SMILES string

[K+].OS([O-])(=O)=O

InChI

1S/K.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+1;/p-1

InChI key

CHKVPAROMQMJNQ-UHFFFAOYSA-M

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1 of 4

This Item
1.04885401544307750
vibrant-m

223476

Potassium bisulfate

vibrant-m

1.04885

Potassium hydrogen sulfate

vibrant-m

401544

Potassium bisulfate

vibrant-m

307750

Potassium disulfate

form

powder or crystals

form

solid

form

crystals and lumps

form

powder

mp

214 °C (lit.)

mp

195 °C (decomposition)

mp

214 °C (lit.)

mp

-

density

2.32 g/mL at 25 °C (lit.)

density

2.24 g/cm3 at 20 °C

density

2.32 g/mL at 25 °C (lit.)

density

2.28 g/mL at 25 °C (lit.)

grade

reagent grade

grade

-

grade

-

grade

-

concentration

35.0-37.0% H2SO4 (titration)

concentration

-

concentration

-

concentration

-

General description

Potassium bisulfate is a water soluble inorganic salt mainly used as a preservative, as a flux and also in the manufacture of fertilizers.
Potassium bisulfate is an inorganic potassium salt. On heating it from 300 to 700°C, it transforms to molten form and the reactions occurring in this transition have been investigated by Raman spectra. Its electrical conductance values have been evaluated (T = 0-700C, Pressure = upto 4000bars).

Application

Potassium bisulfate (Potassium hydrogen sulfate) may be employed as a catalyst in the synthesis of butyl paraben and methyl cinnamate. It may also be used for the gravimetric estimation of beryllium in beryl.
Potassium bisulfate may be used:
  • As a catalyst for the preparation of butyl paraben from p-hydroxybenzoic acid and n-butyl alcohol.
  • As a promoter for the synthesis of 3,4-dihydropyrimidin-2(1H)-one derivatives via Biginelli reaction in ethylene glycol.
  • As an acid catalyst for the synthesis of ethyl tert-butyl ether (ETBE) from ethanol and tert-butyl alcohol via reactive distillation.
  • As a dehydrating agent for the synthesis of pyruvic acid from tartaric acid.

pictograms

CorrosionExclamation mark

signalword

Danger

Hazard Classifications

Eye Dam. 1 - Skin Corr. 1B - STOT SE 3

target_organs

Respiratory system

Storage Class

8A - Combustible, corrosive hazardous materials

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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Customers Also Viewed

Slide 1 of 5

1 of 5

Reactive distillation for synthesizing ethyl tert-butyl ether from low-grade alcohol catalyzed by potassium hydrogen sulfate.
Matouq M, et al.
Industrial & Engineering Chemistry Research, 35(3), 982-984 (1996)
Craig BD and Anderson DS
Handbook of Corrosion Data, 634-634 null
Synthesis of Methyl Cinnamate using Potassium Bisulfate as Catalyst [J].
4Danmei LSL.
Guangzhou Chemical Industry/ Guangzhou Huagong, 2, 005-005 (2003)
Raman spectral studies of molten potassium bisulfate and vibrational frequencies of S2O7 groups.
Walrafen GE, et al.
J. Chem. Phys. , 37(3), 662-670 (1962)
Determination of beryllium and titanium with benzoylacetanilide.
Sarkar AK and Das J.
Analytical Chemistry, 39(13), 1608-1612 (1967)

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