Skip to Content
Merck
All Photos(3)

Key Documents

View All Documentation

223476

Sigma-Aldrich

Potassium bisulfate

reagent grade

Synonym(s):

Potassium hydrogen sulfate

Sign Into View Organizational & Contract Pricing
All Photos(3)

About This Item

Linear Formula:
KHSO4
CAS Number:
7646-93-7
Molecular Weight:
136.17
EC Number:
231-594-1
MDL number:
MFCD00011404
UNSPSC Code:
12352302
eCl@ss:
38030413
PubChem Substance ID:
329752310
NACRES:
NA.21

grade

reagent grade

Quality Level

200

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

Looking for similar products? Visit Product Comparison Guide

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
GHS05,GHS07

Signal Word

Danger

Hazard Statements

H314,H335

Hazard Classifications

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

Target Organs

Respiratory system

Storage Class Code

8A - Combustible corrosive hazardous materials

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Synthesis of Methyl Cinnamate using Potassium Bisulfate as Catalyst [J].
4Danmei LSL.
Guangzhou Chemical Industry/ Guangzhou Huagong, 2, 005-005 (2003)
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)
Synthesis of Butyl Paraben Catalyzed by Potassium Bisulfate [J].
Jianying CDZHH.
Food and Fermentation Industries, 11, 022-022 (2006)
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)
View All Related Papers

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service