Hydrate Lime
Slaked Lime, Calcium Hydroxide, Ca(OH)2.
- CAS
- 1305-62-0
- EC
- 215-137-3
- Sectors
- Water & Wastewater Treatment, Building & Construction, Agriculture
Hydrate Lime (CAS 1305-62-0), also known as slaked lime or calcium hydroxide, is an alkaline inorganic chemical supplied as a fine white powder, used in water treatment, construction mortars and plasters, and agricultural soil conditioning. The material is highly valued in construction for its superior bonding and plasticity in mortars and plasters. Its Technical Grade quality ensures consistent pH adjustment in industrial water treatment and flue gas neutralisation. In agriculture, it is a critical soil conditioner used to neutralize acidity and improve nutrient availability for crops. It is an economical and effective chemical for diverse large-scale industrial stabilization processes.
Typical Properties
| Molecular formula | CaH2O2 |
|---|---|
| Molecular weight | 74.09 g/mol |
| Form | Solid |
| Color | White |
| Odor | Odorless |
| Melting point | 580 °C (decomp) |
| Boiling point | 2850 °C |
| Density | 2.24 g/cm³ |
| Water solubility | 1.65 g/L (20 °C) |
| pH | 12.6 (H2O, 20°C)(saturated solution) |
| GHS signal word | Danger · Corrosive, Irritant / harmful, Health hazard |
| HS code | 28259099 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Hydrate Lime
Applications
- Water Treatment: Used for softening, pH adjustment, and the removal of heavy metals from industrial wastewater.
- Construction: Essential for soil stabilization in road building and as a primary component in traditional lime plasters.
- Flue Gas Treatment: Acts as a sorbent to neutralize acidic gases (SO2 and HCl) in industrial emission control systems.
Safety & Risks
Classified as Skin Irritant (Category 2) and Serious Eye Damage (Category 1). Use Chemical Goggles, Protective Gloves, and a Dust Mask to prevent caustic burns.
Packaging
Available in 25 kg paper bags, 1000 kg jumbo bags, and bulk tankers for large industrial projects.