Product Category: Mining Chemicals / Water Treatment Chemicals / Industrial Minerals
Chemical Name: Calcium Hydroxide
Alternative Names: Hydrated Lime / Slaked Lime
CAS Number: 1305-62-0
Chemical Formula: Ca(OH)₂
Molecular Weight: 74.09 g/mol
Appearance: Fine white powder
Product Overview
White Hydrated Lime is a highly useful alkaline mineral product manufactured by reacting quicklime with controlled quantities of water.
It is extensively used across mining, mineral processing, water treatment, acid neutralisation, construction and environmental applications.
For mining customers, Hydrated Lime is particularly valuable as an economical pH modifier and neutralising agent.
Typical Technical Specification
| Property | Typical Reference |
| SKU | MCS-H6 |
| Calcium Hydroxide | Approx. ≥90% for standard technical grades |
| Higher-Purity Grades | Up to approximately 95% Ca(OH)₂ |
| Appearance | Fine white powder |
| pH – Saturated Solution | Approx. 12.4 |
| Moisture | Typically ≤1–2% |
| Formula | Ca(OH)₂ |
| CAS Number | 1305-62-0 |
| Molecular Weight | 74.09 g/mol |
South African commercial technical hydrated lime is available at approximately 90% minimum Ca(OH)₂, while premium industrial grades can reach approximately 95%.
Mining Applications
- Flotation pH modification
- Mine-water neutralisation
- Acid-mine-drainage treatment
- Tailings-water treatment
- Effluent neutralisation
- Mineral-processing circuits
Additional Applications
- Municipal water treatment
- Sewage treatment
- Soil stabilisation
- Flue-gas treatment
- Construction
- Paper manufacturing
- Sugar processing
- Chemical manufacturing
Key Benefits
- Cost-effective alkalinity source
- Excellent acid neutralisation
- Effective pH adjustment
- Useful in precipitation of dissolved metals
- Widely used in mining operations
- Easy dry-product handling
Packaging
Typically supplied in 25 kg industrial bags, FIBCs or bulk pneumatic-tanker supply depending on quantity.
Storage
Store dry and sealed.
Protect from moisture and prolonged atmospheric exposure because hydrated lime can react with atmospheric carbon dioxide.
