Calcium oxide
- Createtime： 2026-04-09
- Updatetime： 2026-09-30
Product Details
| useage |
Industrial use
|
| deliveryInfo |
|
| appearance |
powder
|
| Molecular Weight |
56.08
|
| aliasen |
|
| supplyCapacity |
50000MT/Month
|
| harbor |
Qingdao,China
|
| minorder |
1KG
|
| Appearance |
White or off-white amorphous lumps or powder
|
Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
Calcium Oxide
1. Basic Product Information
Product Name: Calcium Oxide
CAS Number: 1305-78-8
Molecular Formula: CaO
Molecular Weight: 56.08
Synonyms: Quicklime, Burnt lime, Unslaked lime
Product Category: Basic inorganic chemical, desiccant, construction raw material, flue gas desulfurizer, water treatment agent, metallurgical flux
2. Physical and Chemical Properties
Physical Indicators
- Appearance: White or off-white amorphous lumps or powder
- Odor: Odorless
- Solubility: Reacts violently with water to generate calcium hydroxide; slightly soluble in glycerol; insoluble in ethanol and organic solvents
- Melting Point: 2572 °C
- Boiling Point: 2850 °C
- Density (20 °C): 3.35 g/cm3
- Hygroscopicity: Extremely hygroscopic; rapidly absorbs water and carbon dioxide from air
- Aqueous Stability: Unstable in humid environment; hydration reaction releases massive heat to form Ca(OH)?; absorbs CO? to generate calcium carbonate
Chemical Characteristics
- Molecular Structure: Ionic inorganic oxide crystal composed of Ca2? and O2?
- Core Functional Mechanism: Strong alkaline oxide; powerful water absorber, neutralizer for acidic wastewater and acid waste gas; widely used as flux in metal smelting
- Photostability: Stable under sealed dry conditions without light degradation
- Thermal Stability: High thermal stability; only sublimates at ultra-high temperature without decomposition
- Chemical Compatibility: Compatible with neutral inert inorganic salts; incompatible with water, acids, carbon dioxide, phosphorus, sulfur and halogen compounds
3. Main Application Fields
- Core Application: Construction & Building Material
Key raw material for mortar, plaster, cement auxiliary and road stabilization soil - Environmental Protection Treatment
Flue gas desulfurization and denitrification agent for power plants; neutralizer for acidic industrial wastewater - Metallurgical Industry Flux
Slagging agent for steelmaking, iron smelting and non-ferrous metal refining to remove impurities - Chemical Raw Material
Raw material for producing calcium hydroxide, calcium carbonate, calcium salt series products; industrial desiccant for drying gas streams - Agriculture & Food Industry
Soil conditioner to improve acidic farmland; food processing aid and food-grade desiccant
4. Platform Category & Product Group Guidance
1) Domestic B2B Platform Category
Recommended Path: Basic Inorganic Chemicals / Metal Oxides
Reason: Classic bulk inorganic alkaline oxide with wide industrial application
2) English Product Group Dropdown Options
Recommended Selection: Basic Inorganic Chemicals
Do NOT select Pharmaceutical Chemicals; it is general industrial inorganic raw material
3. Standard Foreign Trade Packaging Specification
25kg woven bag lined with PE inner film for industrial grade; sealed plastic barrel for food/analytical grade; bulk jumbo bag available
5. Quality Specification Table
| Test Item | Standard Requirement |
| CAS Number | 1305-78-8 |
| Molecular Formula | CaO |
| Appearance | Uniform white lumps or powder free of grey impurities |
| CaO Content | Industrial Grade ≥90.0%, Food Grade ≥95.0% |
| Water Insoluble Substance | ≤1.0% |
| Heavy Metals (Pb) | ≤10 ppm |
| Arsenic (As) | ≤2 ppm |
| Loss on Ignition | ≤5.0% |
| Standard Storage Package | Airtight PE lined woven bag, dry warehouse storage |
