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High Calcium Quicklime
Names
Lime; Quicklime; Burnt Lime; Unslaked Lime; Pebble Lime; Hi-Cal Lime
Insight Articles
#PS788
calciumoxide lime quicklime burntlime limestone highcalcium
Main Product
Calcium Oxide
Segment
Chemicals
Main-Family
Inorganics
Sub-Family
Inorganic Oxides
Physical State

Solid

Description

High-calcium quicklime is the purest and most widely produced commercial form of calcium oxide, derived by calcining select high-calcium limestone deposits containing no more than 5% magnesium carbonate. It is characterized by its high CaO content (typically 93–97%), superior reactivity, and consistent chemistry — properties that make it the preferred grade for applications requiring high alkalinity, fast slaking, and chemical purity. It is routinely tested for quality and consistency to ensure the right chemistry and physical performance for demanding industrial applications.

Physical & Chemical Properties

Property Value
Appearance White to off-white lumps, pebbles, granules, or powder
CaO content 93–97%
MgO content ≤2.5%
SiO₂ content ≤1.5%
Density 3.35 g/cm³
Bulk density 800–1,050 kg/m³
pH (saturated solution) ~12.45
Melting point 2,613°C
Slaking reactivity Medium to highly reactive
Available sizing Lump (up to 200 mm) down to pulverized (<0.5 mm)

 

Key Applications

  • Primary steelmaking flux (BOS and EAF furnaces)
  • Water and wastewater pH correction and heavy metal precipitation
  • Flue gas desulfurization (FGD)
  • Chemical manufacturing (PCC, calcium carbide, calcium hypochlorite)
  • Pulp and paper (causticizing)
  • Food processing (E529 grade
  • General industrial neutralization applications

References

  1. Carmeuse Americas (Mar 2024). Product Safety Datasheet: High Calcium Quicklime
  2. Carmeuse Americas (Mar 2024). Product Safety Datasheet: Magnesium Enhanced Quicklime
  3. Tradeasia International (Feb 2, 2020). What Is Quicklime? Types, Properties, And Uses
  4. Graymont (Nov 4, 2025). Safety Datasheet: High Calcium Quicklime
  5. Graymont (May 7, 2025). Safety Datasheet: Dolomite Quicklime
  6. HiTech Minerals and Chemicals Group. Understanding Quick Lime: Types, Properties, and Applications (Accessed Mar 14, 2026)
  7. The National Lime & Stone Company (Sep 12, 2024). Safety Data Sheet: Dried Dolomite – Industrial Mineral Products
  8. Peter Chemical Company. 019). Calcium Oxide or Quicklime (Accessed Mar 14, 2026)
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Products Picture
High calcium quicklime | Source: Carmeuse https://www.carmeuse.com/na-en/products/high-calcium-quicklime
Identifiers
logo CAS Number
1305-78-8
logo EC Number
151-389-9
logo ECHA InfoCard
100.013.763
logo IUPAC Name
Calcium oxide
logo PubChem ID
14778
Chemical Data
Chemical Formula

CaO

Molecular Weight (g/mol)
56.08
Boiling Point (°C)
2850
Melting Point (°C)
2613
Sulfur Content (wt%)
0
Specific Gravity
3.35
Crude Data
API Gravity
-89.26
Country
Product Settings
Default
Status
A
Content provided by
Transaction Name Date
Modified by UserPic   Kokel, Nicolas 3/14/2026 4:12 PM
Added by UserPic   Kokel, Nicolas 3/13/2026 8:38 AM