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Calcium Oxide

  • Calcium Oxide
  • Calcium Oxide
  • Calcium Oxide

Calcium Oxide

CAS No.: 1305-78-8
Molecular Formul: CaO
Molecular Weight: 56.08
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Product Description

Calcium oxide (CaO, CAS Reg. No. 1305-78-8) is also known as lime, quick lime, burnt lime, or calx. Lime does not occur naturally since it reacts so readily with water (to form hydrated lime) and carbon dioxide (to form limestone). It is produced from calcium carbonate, limestone, or oyster shells by calcination at temperatures of 1,700-2,450℃.


Chemical Properties

PropertyValue

Melting point

2570 °C

Boiling point

2850 °C (lit.)

Density

3.3 g/mL at 25 °C (lit.)

Bulk density

800-1200kg/m3

Refractive index

1.83

Fp

2850°C

Storage temp.

No restrictions.

Solubility

1.65g/l Risk of violent reaction.

Form

Powder

Color

White to yellow-very slightly beige

Specific Gravity

3.3

PH

12.6 (H2O, 20℃)(saturated solution)

Odor

wh. or gray cryst. or powd., odorless

Water Solubility

REACTS

Sensitive

Air & Moisture Sensitive

Crystal Structure

Cubic

Crystal system

Cube

Merck

14,1686

Space group

Fm3m

Lattice constant

a/nmb/ nmc/ nmα/ oβ/ oγ/ oV/ nm30.47760.47760.47769090900.1089

Dielectric constant

2.2（Ambient）

Exposure limits

ACGIH: TWA 2 mg/m3OSHA: TWA 5 mg/m3NIOSH: IDLH 25 mg/m3; TWA 2 mg/m3

Stability

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

InChIKey

ODINCKMPIJJUCX-UHFFFAOYSA-N

CAS DataBase Reference

1305-78-8(CAS DataBase Reference)

NIST Chemistry Reference

Calcium monoxide(1305-78-8)

EPA Substance Registry System

Calcium oxide (1305-78-8


Safety Information

PropertyValue
Hazard   SymbolsC, Xi
Risk Codes34-41-37/38
Safety Statements26-36/37/39-45-25-39
UN NumberUN 1910
Occupational Exposure LevelB
Occupational Exposure LimitTWA: 2 mg/m³
WGK (Germany)1
RTECS NumberEW3100000
Flammability (F)10-21-34
TSCA StatusTSCA listed
Hazard Class8
Packing GroupIII
HS Code28259019
Storage Class13 – Non-combustible solids
Hazard CategoriesSerious eye damage, Category 1; Skin irritation, Category 2;   Specific target organ toxicity (single exposure), Category 3
Toxic Substance Data1305-78-8 (Hazardous Substances Data)
IDLH (Immediately Dangerous to   Life or Health)25 mg/m³


Product Usage

Calcium oxide, commonly known as quicklime, is a vital industrial chemical with diverse applications rooted in its high reactivity and alkalinity. Its primary use is in the steel industry, where it acts as a flux to remove impurities like phosphorus and sulfur during smelting. In environmental protection, it is essential for flue gas desulfurization and wastewater treatment, effectively neutralizing acidic effluents and precipitating heavy metals. Furthermore, it serves as a critical building material for manufacturing calcium silicate board and mortar. In the chemical sector, it is a key reagent for producing calcium carbide and a high-efficiency desiccant for removing moisture from gases and organic solvents.

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Shipping and Transportation

Delivery Time

Inventory 2-3 working days New manufacturing 7-10 working days

Mode of Transportation
1. By Air, fast but expensive.
2. By Sea, usual and economy.
3. By Train, suit for middle Asia countries.
4. By Express, suit for small package.
We only provide highest quality goods available, accompanied by after support!

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FAQ

Q1: What international standards do your products and services comply with?

A1: Our products fully comply with international standards such as REACH, MSDS, and COA, and we strictly implement the ISO9001 quality management system. We can also provide third-party testing reports (SGS, BV, etc.) according to customer needs.


Q2: How long does it take for goods to be delivered to my country?
A2: The delivery time depends on the transport mode and destination country. Generally, sea transport takes 15-30 days, air transport takes 3-7 days, and we will optimize the transport route to shorten the delivery time as much as possible.


Q3: Can you provide customs clearance services for dangerous chemicals?
A3: Yes. Our team is proficient in the customs clearance procedures for dangerous chemicals in various countries, and can provide professional compliant declaration and customs clearance services to ensure smooth customs clearance.


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A4: Yes. We can provide personalized product customization and export service solutions according to your specific needs (product specifications, application scenarios, procurement volume, etc.).

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