Substance profile
Calcium Chloride
Calcium Chloride is white cubic crystals or powder and is odorless.
01 · Identification
What Calcium Chloride is
Calcium Chloride is white cubic crystals or powder and is odorless. Its molecular formula is CaCl2 and its molecular weight is 110.98 g/mol. It boils at 1935 °C, melts at 775 °C, is soluble in water.
Under the GHS it carries the signal word Warning.
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 |
|---|---|
| H319 | Causes serious eye irritation. |
Precautionary statements: P264, P280, P305, P313, P337, P338
03 · Physical and chemical properties
Calcium Chloride 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 |
|---|---|---|---|
| Boiling point | 1935 °C (3515 °F) | HSDB | |
| 1670 °C (3038 °F) | ICSC | ||
| 1935 °C (3515 °F) | at 760 mmHg | DOE PAC | |
| Melting point | 775 °C (1427 °F) | HSDB | |
| 260 °C (500 °F) | Calcium chloride monohydrate | HSDB | |
| 772 °C (1421.6 °F) | ICSC | ||
| Density | 0.835 g/cm³ | Calcium chloride dihydrate | HSDB |
| 2.15 g/cm³ | at 20 °C | CAMEO | |
| 2.15 g/cm³ | at 25 °C | HSDB | |
| Solubility | Soluble in methyl carbonate and acetic acid | HSDB | |
| Very soluble in ethanol | HSDB | ||
| Freely soluble in water with liberation of much heat | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Calcium Chloride
Storage conditions
Storage space should be well ventilated.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Exothermic reaction with water.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
Bromine trifluoride rapidly attacks calcium chloride [Mellor 2 Supp. 1:164, 165 1956]. Long term exposure of calcium chloride solution upon a zinc coated galvanized iron vessel caused slow evolution of hydrogen which ignited and exploded [Bretherick, 5th Ed., 1995].
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Calcium Chloride in the storage compatibility matrix →