Calcium Oxide (Quicklime) Moisture Scavenger
CAS Number: 1305-78-8
Calcium Oxide (CaO, quicklime) is a high-capacity inorganic moisture scavenger used in moisture-sensitive adhesive, sealant, and encapsulant formulations to extend shelf life and prevent premature cure. It reacts irreversibly with water to form calcium hydroxide, making it highly effective even at very low moisture levels. Fine-grade CaO is used in organic electronics encapsulants (OLED), one-component epoxy films, and polyurethane formulations where residual moisture must be minimized.
Technical Specifications
| purity | ≥98% |
| moisture | ≤0.3% |
| appearance | White fine powder |
| BET surface area | 5–15 m²/g |
| averageParticleSize | 1–10 µm (grade dependent) |
Applications
- OLED and organic electronics encapsulant
- One-component epoxy adhesive films
- Moisture-sensitive PU sealant formulations
- Desiccant in electronic device packaging
- Getters in vacuum insulating panels
Key Features
- Very high moisture absorption capacity
- Irreversible reaction ensures permanent scavenging
- Fine grades for uniform dispersion in thin films
- Cost-effective inorganic desiccant
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CAS Number
1305-78-8
Category
Adhesive / Sealant AdditivesAvailability
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