Potassium bisulfate
SIGALD/223476 - reagent grade
Synonym: Potassium hydrogen sulfate
CAS Number: 7646-93-7
Empirical Formula (Hill Notation): HKO4S
Molecular Weight: 136.17
EC Number: 231-594-1
MDL Number: MFCD00011404
Linear Formula: KHSO4
Product Type: Chemical
acid number | 35‑37%(as H2SO4) |
concentration | 35.0-37.0% H2SO4 (titration) |
density | 2.32 g/mL at 25 °C (lit.) |
form | powder or crystals |
grade | reagent grade |
InChI | 1S/K.H2O4S/c;1-5(2,3)4/h; |
InChI key | CHKVPAROMQMJNQ-UHFFFAOYSA |
mp | 214 °C (lit.) |
Quality Level | 200 ![]() |
SMILES string | [K+].OS([O-])(=O)=O |
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. |
Application: | 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. |
General description: | 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). |
Packaging: | 1 kg in poly bottle |
Packaging: | 500 g in poly bottle |
Symbol | ![]() ![]() |
Signal word | Danger |
Hazard statements | H314 - H335 |
Precautionary statements | P260 - P271 - P280 - P301 + P330 + P331 - P303 + P361 + P353 - P305 + P351 + P338 |
Hazard Codes | C |
Risk Statements | 34-37 |
Safety Statements | 26-36/37/39-45 |
RIDADR | UN 2509 8 / PGII |
WGK Germany | WGK 1 |
Flash Point(F) | Not applicable |
Flash Point(C) | Not applicable |
mp | 214 °C (lit.) |
Density | 2.32 g/mL at 25 °C (lit.) |
UNSPSC | 12352300 |