Substance profile
Cobalt Sulfate
Cobalt Sulfate is red to lavender dimorphic, othorhombic crystals and is odorless.
01 · Identification
What Cobalt Sulfate is
Cobalt Sulfate is red to lavender dimorphic, othorhombic crystals and is odorless. Its molecular formula is CoO4S and its molecular weight is 155 g/mol. It melts at 735 °C.
Under the GHS it carries the signal word Danger.
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 |
|---|---|
| H350i | May cause cancer by inhalation. |
| H341 | Suspected of causing genetic defects <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H360F | May damage fertility. |
| H302 | Harmful if swallowed. |
| H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled. |
| H317 | May cause an allergic skin reaction. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P201, P261, P270, P272, P273, P280, P301, P308, P312, P313, P330, P333, P391, P501
03 · Physical and chemical properties
Cobalt Sulfate 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 | 735 °C (1355 °F) | HSDB | |
| Density | 3.71 g/cm³ | ICSC | |
| 1.948 g/cm³ | at 20 °C | CAMEO | |
| 3.71 g/cm³ | at 25 °C | HSDB | |
| Solubility | Odorless; heat of solution: 23 BTU/lb= 13 cal/g= 0.54X10+5 J/kg; solubility: 35.040 lb/100 lb water at 70 °F | at 21.11 °C, Cobaltous sulfate heptahydrate | HSDB |
| In water, 330 g/L at 20 °C | at 20 °C | HSDB | |
| 38.3 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 Cobalt Sulfate
Storage conditions
Separated from strong oxidants.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Reacts as a dust with strong oxidants causing fire and explosion hazard.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
Acidic salts, such as COBALT 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 Cobalt Sulfate in the storage compatibility matrix →