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Opis
Calcium Oxide
Other Names: Quicklime, Burnt Lime, Lime
CAS Number: 1305-78-8
Sum Formula: CaO
Molar Mass: 56.08 g/mol
Appearance: White to pale yellow powder or lumps
Calcium oxide is a widely used inorganic compound formed by the thermal decomposition of calcium carbonate (limestone). It is a basic oxide and reacts vigorously with water to form calcium hydroxide, releasing heat in an exothermic reaction.
Chemical and Physical Properties
Density: 3.34 g/cm³
Melting Point: 2,572°C
Boiling Point: 2,850°C
Solubility in Water: Reacts with water to form calcium hydroxide (slightly soluble)
Solubility in Other Solvents: Insoluble in alcohol; reacts with acids
Odor: Odorless
Applications
Construction: Used in the manufacture of cement, mortar, and plaster.
Chemical Industry: Employed as a reagent in various chemical processes, including pH regulation and flue gas treatment.
Metallurgy: Acts as a flux in steelmaking to remove impurities.
Glass and Ceramics: Utilized in the production of glass, ceramics, and refractory materials.
Safety
Signal Word: Danger
H302 (18.2%): Harmful if swallowed [Warning Acute toxicity, oral]
H314 (25.8%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
H315 (63.8%): Causes skin irritation [Warning Skin corrosion/irritation]
H318 (92.8%): Causes serious eye damage [Danger Serious eye damage/eye irritation]
H335 (63%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
P260, P261, P264, P264+P265, P270, P271, P280, P301+P317, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P319, P321, P330, P332+P317, P362+P364, P363, P403+P233, P405, and P501
First Aid Measures
Eye Contact: Rinse immediately with plenty of water for at least 15 minutes. Seek immediate medical attention.
Skin Contact: Remove contaminated clothing. Rinse skin thoroughly with water. Seek medical attention for burns or irritation.
Inhalation: Move to fresh air. If symptoms persist, seek medical attention.
Ingestion: Rinse mouth. Do not induce vomiting. Seek immediate medical attention.
Handling and Storage
Storage Conditions: Store in a dry, tightly closed container in a cool, well-ventilated area. Protect from moisture and incompatible materials such as acids.
Handling Precautions: Avoid generation of dust. Do not breathe dust. Use appropriate personal protective equipment and handle in a well-ventilated area.
