Substance profile
Dipotassium peroxodisulphate
Dipotassium peroxodisulphate is colorless, triclinic crystals and is odorless.
01 · Identification
What Dipotassium peroxodisulphate is
Dipotassium peroxodisulphate is colorless, triclinic crystals and is odorless. Its molecular formula is K2O8S2 and its molecular weight is 270.33 g/mol.
Under the GHS it carries the signal word Danger. It is classed as reactive agents - 1st degree.
Other names for Dipotassium peroxodisulphate
- potassium persulphate
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.
| Code | Hazard statement |
|---|---|
| H272 | May intensify fire; oxidiser. |
| H302 | Harmful if swallowed. |
| H335 | May cause respiratory irritation. |
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
| H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled. |
| H317 | May cause an allergic skin reaction. |
Precautionary statements: P261, P264, P270, P272, P280, P301, P302, P305, P312, P313, P330, P332, P333, P337, P338, P352
03 · Physical and chemical properties
Dipotassium peroxodisulphate 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 | 2.477 g/cm³ | HSDB | |
| 2.5 g/cm³ | ICSC | ||
| 2.477 g/cm³ | at 25 °C | DOE PAC | |
| Solubility | INSOL IN ALCOHOL | HSDB | |
| 5.2 G IN 100 CC OF HOT WATER @ 20 °C | at 20 °C | HSDB | |
| Solubility in water, g/100ml at 20 °C: 5.2 | at 20 °C | ICSC | |
| Vapor density | 2.48 (air = 1) | OSHA |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Dipotassium peroxodisulphate
Storage conditions
Keep containers closed and store in cool dark places.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
POTASSIUM PERSULFATE PLUS A LITTLE POTASSIUM HYDROXIDE & WATER IGNITED POLYTHENE (POLYETHYLENE) LINER OF CONTAINER BY SIMULTANEOUS RELEASE OF HEAT & OXYGEN.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
POTASSIUM PERSULFATE is an oxidizing agent. Noncombustible but accelerates the burning of combustible material. Potassium persulfate plus a little potassium hydroxide and water released sufficient heat and oxygen to ignite a polythene (polyethylene) liner in a container. [MCA Case History 1155. 1955].
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Dipotassium peroxodisulph… in the storage compatibility matrix →