Substance profile
Potassium hydrogensulphate
Potassium hydrogensulphate: large Crystals; Other Solid; Dry Powder; Large Crystals.
01 · Identification
What Potassium hydrogensulphate is
Potassium hydrogensulphate: large Crystals; Other Solid; Dry Powder; Large Crystals. Its molecular formula is HKO4S and its molecular weight is 136.17 g/mol.
Under the GHS it carries the signal word Danger. It is classed as corrosives.
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
03 · Physical and chemical properties
Potassium hydrogensulphate properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 2.2 g/cm³ | ICSC | |
| 2.24 g/cm³ | at 25 °C | DOE PAC | |
| Solubility | Solubility in water, g/100ml: 49 (very good) | ICSC | |
| Freely soluble in water, insoluble in ethanol | EU Food Improvement Agents |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Potassium hydrogensulphate
Reactivity
Acidic salts, such as POTASSIUM HYDROGEN SULFATE, are generally soluble in water. The resulting solutions contain moderate concentrations of hydrogen ions and have pH's of less than 7.0. They react as acids to neutralize bases. These neutralizations generate heat, but less or far less than is generated by neutralization of inorganic acids, inorganic oxoacids, and carboxylic acid. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. Many of these compounds catalyze organic reactions.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Potassium hydrogensulphat… in the storage compatibility matrix →