Calcium Oxide | CAS No. 1305-78-8

Calcium Oxide

Basic Information

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CAS Number

1305-78-8

Molecular Formula

CaO

Molecular Weight

56.08 g/mol

Chemical Classification

Basic Chemical Raw Materials Inorganic Chemicals Acids

Basic Physical Properties

Melting Point

2570 ºC

Boiling Point

2850 °C

Flash Point

2850°C

Solubility

1.65g/l Risk of violent reaction.

Refractive Index

1.83

SMILES

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[Ca].O

InChI

1S/Ca.O/q+2;-2

InChIKey

ODINCKMPIJJUCX-UHFFFAOYSA-N

LogP

-0.11880

Topological Polar Surface Area

31.5 Å²

Hydrogen Bond Donor/Acceptor

2 / 1

Complexity

Safety Information

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GHS Hazard Pictograms

H314

Hazard Statement

H314 Causes severe skin burns and eye damage
Skin corrosion/irritation

Hazard Class

Class 8 Class 8

Stability

Stability Stable, but absorbs carbon dioxide from the air. Incompatible with water, moisture, fluorine, strong acids.

Sensitiveness

Air & Moisture Sensitive

Synonyms & References

English

Calcium oxide
FLUXING LIME
LIME, CAUSTIC
LIME
CAUSTIC
BURNT LIME
CALX
CALCIUM (II) OXIDE
Calcium oxide (ACS grade)
Calcia
Calcium oxide,powder
Lime,Quicklime
oxocalcium
QuickliMe
S130
Calcium oxide,AR
Calcium oxide,CP
Calcium oxide,SP
CaO
cml21
cml31
calxyl
airlock
Dynacal

MDL Number

MFCD00010911

Customs Code

2825909000

FAQ

What is Calcium Oxide (CAS: 1305-78-8)?

Calcium oxide, with the CAS number 1305-78-8, is a white, alkaline inorganic compound commonly known as quicklime. It has the chemical formula CaO and is characterized by its high reactivity with water, exothermic reaction, and ability to act as a strong desiccant. It is widely used in various industrial and chemical processes due to its basic properties and thermal stability.

What are the main uses of Calcium Oxide (CAS: 1305-78-8)?

Calcium oxide (CAS: 1305-78-8) is primarily used in steel manufacturing, cement production, and water treatment. It serves as a drying agent in pharmaceuticals and as a food additive (E529) to neutralize acidity. Additionally, it is employed in chemical research, soil treatment, and as a component in calcium hydroxide synthesis. Its applications span across construction, agriculture, and industrial sectors.

Is Calcium Oxide (CAS: 1305-78-8) safe?

Calcium oxide (CAS: 1305-78-8) is safe when handled according to proper safety protocols. It is corrosive and can cause skin and eye irritation, so protective gear like gloves and goggles is essential. Inhalation of dust may lead to respiratory issues, and it should be stored securely to prevent accidental exposure. Safety standards include adherence to OSHA guidelines and using ventilation in industrial settings.

How should Calcium Oxide (CAS: 1305-78-8) be stored?

Calcium oxide (CAS: 1305-78-8) should be stored in a cool, dry, and well-ventilated area, sealed in airtight containers to prevent moisture exposure. It is hygroscopic and reacts vigorously with water, so storage must avoid humidity and direct contact with water. Keep it away from incompatible materials and ensure proper labeling for safe handling and long-term stability.