Functional Roles
Industries Served
Physical Properties
melting_point
4662 u00b0F (NIOSH, 2024)
boiling_point
5162 u00b0F at 760 mmHg (NIOSH, 2024)
density
3.3 at 68 u00b0F (USCG, 1999) - Denser than water; will sink
solubility
Reacts with water (NIOSH, 2024)
vapor_pressure
0 mmHg (approx) (NIOSH, 2024)
flash_point
Not flammable
ph
SATURATED SOLN IN WATER IS ABOUT 12.8
GHS / SDS Safety
Danger
Irritant
Health Hazard
Corrosive
- H315: Causes skin irritation [Warning Skin corrosion/irritation]
- H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
- H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]
- H335 (63%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
- Not Classified
- H314 (25.8%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
- H303: May be harmful if swallowed [Warning Acute toxicity, oral]
- H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]
- H302 (18.2%): Harmful if swallowed [Warning Acute toxicity, oral]
- H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
- Reported as not meeting GHS hazard criteria by 1 of 1 companies. For more detailed information, please visit ECHA C&L website.
- H315 (63.8%): Causes skin irritation [Warning Skin corrosion/irritation]
- H371: May cause damage to organs [Warning Specific target organ toxicity, single exposure]
- H304: May be fatal if swallowed and enters airways [Danger Aspiration hazard]
- H314: Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
- H318 (92.8%): Causes serious eye damage [Danger Serious eye damage/eye irritation]
Chemical Identity
| CAS Number | 1305-78-8 |
| IUPAC Name | oxocalcium |
| InChI Key | ODINCKMPIJJUCX-UHFFFAOYSA-N |
| PubChem CID | 14778 |
| INCI Name | CALCIUM OXIDE |
Synonyms & Trade Names
Full Description
Calcium oxide (CaO), also known as quicklime, is an inorganic alkaline compound that functions as a pH adjustment agent in industrial applications. This white, crystalline solid reacts exothermically with water and is utilized across industrial manufacturing, mining, oil & gas, and water treatment operations for pH control and neutralization processes. With a molecular weight of 56.08 and high density of 3.3 g/cm³, calcium oxide offers reliable alkalinity adjustment in demanding industrial environments.