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Merck
CN

223476

Potassium bisulfate

reagent grade

Synonym(s):

Potassium hydrogen sulfate

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About This Item

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

Key Documents

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Product Name

Potassium bisulfate, reagent grade

InChI key

CHKVPAROMQMJNQ-UHFFFAOYSA-M

InChI

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

SMILES string

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

grade

reagent grade

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.)

Quality Level

200

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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.

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).

pictograms

CorrosionExclamation mark
GHS05,GHS07

signalword

Danger

hcodes

H314,H335

Hazard Classifications

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

target_organs

Respiratory system

Storage Class

8A - Combustible corrosive hazardous materials

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Information

危险化学品
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Certificates of Analysis (COA)

Lot/Batch Number
STBL0464
STBK3233
STBK2194
STBK1756
STBJ7353

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Determination of beryllium and titanium with benzoylacetanilide.
Sarkar AK and Das J.
Analytical Chemistry, 39(13), 1608-1612 (1967)
PYRUVIC ACID
Organic Syntheses, 4, 63-63 (1925)
Craig BD and Anderson DS
Handbook of Corrosion Data, 634-634 null
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 Methyl Cinnamate using Potassium Bisulfate as Catalyst [J].
4Danmei LSL.
Guangzhou Chemical Industry/ Guangzhou Huagong, 2, 005-005 (2003)
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