Ca(OH)2
Alkaline calcium hydroxide for mortar and plaster, soil stabilization, pH control and water softening.
Hydrated lime is calcium hydroxide, a fine white alkaline powder produced by reacting quicklime with water.
It is used in mortars, plasters and soil stabilization, for pH correction, softening and sludge treatment in water and wastewater, for neutralizing acidic soils, and in flue gas treatment and chemical processing.
Typical uses for this chemical. Suitability for a specific process, and grade requirements for food, pharmaceutical or potable-water use, should be confirmed with our team.
| Chemical name | Calcium hydroxide |
|---|---|
| Formula | Ca(OH)2 |
| CAS number | 1305-62-0 |
| Molecular weight | 74.09 g/mol (Ca(OH)2) |
| HS code | 2522.20 |
| Transport classification | Not regulated for transport |
| Appearance | Fine, dry, white odourless powder; strongly alkaline (pH ≈ 12.4 in water) |
| Forms | Dry powder (high-calcium hydrated lime) · Dolomitic hydrated lime powder (Type N, S, SA) · Milk of lime / liquid calcium hydroxide slurry (e.g. ~38% solids) |
| Grades | High-calcium industrial / chemical grade (94-99% Ca(OH)2) · Water-treatment grade (AWWA B202, NSF/ANSI/CAN 60, EN 12518) · Building lime CL 90-S (EN 459-1) and ASTM C207 Type N / Type S · Flue-gas treatment high-surface-area grades · Food grade (FCC) |
| Packaging | 50 lb (22.7 kg) bags · Small bags from 10 kg (retail/agricultural) · Bulk bags (FIBC) · Dry bulk (pneumatic truck, rail) |
Identifiers and classifications are standard reference data for the substance. Forms, grades and packaging reflect what is commonly traded internationally; availability for your order is confirmed in the quotation.
Typical values for commonly traded grades of Hydrated Lime, based on international standards and published manufacturer data.
| Parameter | Typical value |
|---|---|
| Ca(OH)2 total | 98.6% (typical) |
| Ca(OH)2 available | 97% (typical) |
| CO2 | 0.5% |
| MgO | 0.5% |
| SiO2 | 0.6% |
| Al2O3 | 0.1% |
| Fe2O3 | 0.06-0.08% |
| Free moisture | 0.5-0.6% |
| Passing 200 mesh (74 µm) | 99% |
| Passing 325 mesh (45 µm) | 96-97% |
| Parameter | Typical value |
|---|---|
| Ca(OH)2 | 94.0-97.0% |
| Passing 325 mesh (45 µm) | 92-97% |
| CaCO3 (impurity) | ≤ 5% |
| SiO2 (impurity) | ≤ 2% |
| MgO (impurity) | ≤ 1% |
| pH (aqueous) | 12.4 |
| Parameter | Typical value |
|---|---|
| Ca(OH)2 | 55.5-58.5% |
| Mg(OH)2 | 38.5-41.5% |
| Passing 325 mesh (45 µm) | 85-90% |
Strongly alkaline (pH about 12.4). Available Ca(OH)2 and fineness determine reactivity for water treatment and neutralisation.
Typical values are for guidance. The specification for your order depends on grade and origin and is confirmed in the quotation, Technical Data Sheet and Certificate of Analysis.
Packaging commonly used for export shipments of this product. Availability depends on grade and origin and is confirmed per order.
Packaging confirmed per order
Tell us your preferred packaging and handling requirements — we'll confirm available options for your grade, volume and destination.
Request the documents you need to evaluate Hydrated Lime. We send documents that match the grade being quoted.
Product specifications and technical information.
Safety and handling documentation where available.
Batch-specific documentation where applicable.
Request a Quote
Share your quantity and destination — our export team will confirm grade, packaging and pricing.
Hydrated Lime is commonly traded as High-calcium industrial / chemical grade (94-99% Ca(OH)2); Water-treatment grade (AWWA B202, NSF/ANSI/CAN 60, EN 12518); Building lime CL 90-S (EN 459-1) and ASTM C207 Type N / Type S; Flue-gas treatment high-surface-area grades; Food grade (FCC). Availability varies by origin and destination market — share the grade, purity or standard you require and we will confirm what can be supplied, with the current specification.
Hydrated Lime is usually classified under HS 2522.20. National tariff codes add further digits and can differ by form and country, so confirm the full code with your customs broker before shipment.
Hydrated Lime is generally not regulated as a dangerous good for road, sea or air transport. The Safety Data Sheet for the grade shipped is the reference used when booking freight.
Commonly referenced standards include AWWA B202, ASTM C207, ASTM C977, EN 459-1. Tell us which standard your application or market requires and we will confirm a grade that meets it.
Common export packaging for Hydrated Lime includes 50 lb (22.7 kg) bags; Small bags from 10 kg (retail/agricultural); Bulk bags (FIBC); Dry bulk (pneumatic truck, rail). Tell us your preferred packaging and we will confirm what is available for your grade and volume.
Yes — request them on this page. We send the documents that apply to the specific grade you are evaluating; a Certificate of Analysis is batch-specific and issued where applicable.
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