Substance profile
Diammonium peroxodisulphate
Diammonium peroxodisulphate is platelike or prismatic (monoclinic) crystals, or white granular powder and is odorless.
01 · Identification
What Diammonium peroxodisulphate is
Diammonium peroxodisulphate is platelike or prismatic (monoclinic) crystals, or white granular powder and is odorless. Its molecular formula is H8N2O8S2 and its molecular weight is 228.21 g/mol. It melts at 120 °C.
Under the GHS it carries the signal word Danger. It is classed as reactive agents - 1st degree.
Other names for Diammonium peroxodisulphate
- ammonium 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
Diammonium 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 |
|---|---|---|---|
| Melting point | 120 °C (248 °F) | decomposes | HSDB |
| Density | 1.982 g/cm³ | HSDB | |
| 1.9 g/cm³ | ICSC | ||
| 1.98 g/cm³ | at 20 °C | CAMEO | |
| Solubility | Freely soluble in water | HSDB | |
| Solubility in water, g/100ml at 20 °C: 58.2 | at 20 °C | ICSC | |
| Solubility in water: 83.5 g/100 g water at 25 °C | at 25 °C | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Diammonium peroxodisulphate
Incompatible materials
A mixutre of ammonium persulfate and sodium peroxide will explode if subjected to crushing (in a mortar), heating, or if a stream of carbon dioxide is passed over it.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
AMMONIUM PERSULFATE is a potent oxidizing agent. A powdered mixture with aluminum and water can explode [NFPA 491M 1991]. A mixture with sodium peroxide will explode if subjected to friction (crushing in a mortar), heating, or if a stream of carbon dioxide is passed over it [Mellor 10:464 1946-47]. Acidic solutions dissolve iron violently, [Mellor, 1947, Vol. 10, 470].
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Diammonium peroxodisulpha… in the storage compatibility matrix →