Hydrated Lime Powder is one of the most versatile industrial chemicals used across water treatment, construction, steel, agriculture, and chemical manufacturing sectors. Due to its strong alkalinity, fine texture, and chemical stability, it plays a critical role in pH control, purification, and stabilization processes.
Hydrated Lime Powder is chemically known as Calcium Hydroxide (Ca(OH)₂). It is a dry, fine white powder produced by reacting Quick Lime (Calcium Oxide – CaO) with water in a controlled hydration process.
Hydrated lime is produced through a two-step process:
Reaction:
[ CaO + H₂O → Ca(OH)₂ + Heat ]
This controlled chemical reaction is known as the slaking process.
Hydrated lime is preferred because:
| Basis | Quick Lime (CaO) | Hydrated Lime (Ca(OH)₂) |
|---|---|---|
| Chemical Name | Calcium Oxide | Calcium Hydroxide |
| Reactivity | Highly reactive | Moderately reactive |
| Handling | Hazardous, generates heat with water | Safer and stable |
| Form | Lumps or powder | Fine white powder |
| Main Use | Steel, cement, chemical | Water treatment, agriculture, construction |
Quick lime reacts violently with water, whereas hydrated lime is already processed and more stable for industrial use.
Understanding its chemical and physical characteristics helps industries choose the right grade and specification.
Hydrated lime appears as a fine, white, odorless powder with smooth texture. High-quality industrial grade is free from impurities and dark particles.
Hydrated lime is slightly soluble in water, forming limewater. Although solubility is low, it provides sufficient alkalinity for industrial reactions.
Exposure to moisture reduces effectiveness and purity.
The production of hydrated lime involves precision and quality control to ensure high purity.
High-calcium limestone is heated in rotary or vertical kilns at temperatures above 900°C.
[ CaCO₃ → CaO + CO₂ ]
This produces Quick Lime (Calcium Oxide).
Quick lime is carefully mixed with controlled amounts of water in hydrators. This exothermic reaction produces hydrated lime.
After hydration:
Fine particle size ensures better reactivity and dispersion.
Manufacturers check:
Industrial-grade hydrated lime typically contains 90–95% purity.
Hydrated lime is packed in:
Proper labeling includes batch number, purity, and manufacturing date.
Hydrated lime serves multiple industries due to its strong alkaline nature.
One of the largest applications of hydrated lime is in water purification.
It neutralizes acidic water and maintains optimal pH levels.
It precipitates metals like lead, chromium, and copper from wastewater.
Improves sludge dewatering and reduces odor.
Industrial effluents are treated to meet environmental discharge standards.
Hydrated lime enhances durability and strength in construction materials.
Improves soil bearing capacity and reduces plasticity.
Enhances workability, flexibility, and crack resistance.
Provides antimicrobial and aesthetic coating.
Improves moisture resistance and pavement durability.
Hydrated lime plays a key role in metal refining.
Removes silica, phosphorus, and sulfur.
Acts as a fluxing agent during metal processing.
Maintains alkalinity in metallurgical processes.
It is widely used as a base material in chemical industries.
Used in production of calcium-based compounds.
Reacted with chlorine to produce calcium hypochlorite.
Used in chemical plants to neutralize acidic streams.
Hydrated lime improves soil productivity.
Reduces soil acidity and enhances nutrient availability.
Used in certain crop protection formulations.
Hydrated lime is essential in sugar processing.
Removes impurities from sugarcane juice.
Helps in sedimentation and purification during refining.
Hydrated Lime Powder (Calcium Hydroxide) is a critical industrial chemical used in water treatment, construction, metallurgy, agriculture, and chemical processing. Its strong alkalinity, controlled reactivity, and cost-effectiveness make it indispensable across sectors.
With increasing environmental regulations and infrastructure growth in 2026, the demand for high-purity hydrated lime continues to rise. Selecting the right grade, proper packaging, and certified suppliers ensures optimal performance and long-term industrial efficiency.
Selecting the right industrial-grade hydrated lime is critical for performance, compliance, and long-term cost efficiency. Below are the standard specifications most industrial buyers look for:
| Parameter | Industrial Grade Standard |
|---|---|
| Purity (Ca(OH)₂) | 85% – 95% |
| Available CaO | 65% – 75% |
| Mesh Size | 200 – 400 Mesh |
| Moisture Content | < 1% |
| Insoluble Matter | < 5% |
| pH (5% solution) | 12 – 12.5 |
Note: Exact specifications may vary slightly depending on industry application and customer requirements.
High purity hydrated lime ensures:
Low purity material increases operational cost due to higher dosing requirements and impurities affecting final output quality.
Mesh size determines the particle fineness of hydrated lime.
Finer mesh size provides:
Industries like water treatment and chemical manufacturing often prefer finer grades for precise process control.
For large industrial buyers, compliance plays a vital role:
Always request compliance documents before bulk procurement.
Different industries require specific grades of hydrated lime:
Used in water treatment, steel plants, and effluent neutralization. Balanced purity and cost-effective for bulk applications.
Higher purity and controlled composition. Used in chemical synthesis and specialty manufacturing.
Designed for soil pH correction. May have slightly lower purity but suitable for farming applications.
Contains high Ca(OH)₂ content. Preferred in chemical processing and sugar industries.
Contains magnesium along with calcium. Used in agriculture and specific industrial processes.
Proper packaging ensures product stability and safe transportation.
Each bag must include:
Proper labeling ensures compliance and traceability.
Hydrated lime requires careful storage to maintain quality.
Hydrated lime absorbs carbon dioxide from air and converts back to calcium carbonate (carbonation), reducing effectiveness.
Purchasing hydrated lime in bulk requires strategic evaluation.
Different industries require different specifications:
Choosing the wrong grade increases cost and reduces efficiency.
Evaluate:
Reliable suppliers ensure consistent bulk supply.
Pricing depends on:
Large volume orders often attract better pricing.
Timely delivery prevents production delays.
Akash Acid & Chemicals, established in 2005, is a respected manufacturer and wholesaler of industrial chemical products.
With over 18 years of industry experience, the company has developed strong technical expertise and customer-focused solutions.
The company continuously improves its products based on industry requirements and customer feedback.
The global and domestic demand for hydrated lime is steadily rising due to:
Increasing environmental awareness and stricter discharge norms are boosting lime consumption.
Road construction, smart cities, and housing projects drive soil stabilization and construction use.
Industries must neutralize acidic effluents before discharge, increasing lime usage.
Growing industrial production increases demand for high-calcium hydrated lime.
Emerging markets in Asia, Africa, and the Middle East show rising demand for industrial chemicals.
Hydrated Lime Powder remains a critical industrial chemical in 2026 due to its versatility, cost-effectiveness, and regulatory importance. For B2B buyers, selecting the right grade, ensuring high purity, verifying compliance, and choosing a reliable supplier are essential for operational success.
Partnering with experienced manufacturers like Akash Acid & Chemicals ensures consistent quality, competitive pricing, and dependable bulk supply for long-term industrial growth.
