Product Information
Chemical Name Calcium Hydroxide
CAS No 1305-62-0
Appearance White odorless fine powder
Synonyms: Slaked lime, Hydrated lime, Calcium dihydroxide, E526
Molecular Formula: Ca(OH)2
MW: 74.09
EINECS: 215‑137‑3
Commercial grades: Industrial grade, Food grade FCC/E526, USP/Pharma grade
Chemphysical Properties
‑ Density (20℃):2.24 g/cm³
‑ Decomposition temperature: 580 ℃
‑ Solubility: Slightly soluble in water; insoluble in ethanol; soluble in glycerol and acids
‑ pH(saturated aqueous):12.4-12.6, strong alkalinity
‑ Character: Reacts with CO₂ in air to form calcium carbonate; hygroscopicQuality Specification
| Test Item | Food / Pharma Grade | Industrial Grade |
|---|---|---|
| Appearance | White fine powder | White powder |
| Ca(OH)₂ Assay | 95.0‑100.5 % | ≥90.0 % |
| Loss on drying | ≤1.0 % | ≤2.0 % |
| Acid‑insoluble substance | ≤0.5 % | ≤1.0 % |
| Carbonate (as CaCO₃) | Pass test | ‑ |
| Heavy metals(Pb) | ≤10 ppm | ‑ |
| Arsenic | ≤4 ppm | ‑ |
Application & Use
Water treatment: pH regulator, softening agent, wastewater neutralizing agent.
Food industry: Food additive E526, pH-adjuster for beverages and food processing.
Pharmaceutical: Dental raw material, excipient for pharmaceutical formulations.
Construction & building: Lime mortar, heritage restoration.
Other: CO₂ absorbent, leather-processing, rubber additive, chemical raw material.
Packing Delivery & Storage
‑ Packing:25 kg PE bag / kraft bag; 1000 kg jumbo bag
‑ Storage: Keep tightly sealed, cool dry warehouse, avoid exposure to air (prevent carbonation).
‑ Shelf-life:12 months under proper storage.
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