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VWR Celite® 545, filter aid, GPR RECTAPUR®
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Diatomaceous silica for filtration
Formula: SiO₂
Specifications:
| Application | Ion Exchange Chromatography | ||
| Storage Temperature | Ambient | ||
| Product Type | Ion Exchange Resins | Forms | Solid |
| Product Brand | VWR | ||
| Product Grade | Analytical grade | Formula | SiO₂ |
High-Purity Diatomaceous Earth for Filtration and Clarification
Celite® 545 is a high-quality filter aid made from purified diatomaceous earth, offering excellent filtration efficiency and particle retention. Manufactured to GPR RECTAPUR® specifications, this reagent-grade material is suitable for use in analytical chemistry, pharmaceutical manufacturing, and industrial liquid filtration. Its fine particle structure enhances clarity and flow rates when filtering biological, chemical, and particulate-rich samples.
Key Features
- GPR RECTAPUR® Grade – Suitable for analytical and general-purpose filtration
- High Filtration Efficiency – Fine particle size for improved retention
- Low Loss on Ignition – ≤0.6% at 600 °C, ideal for gravimetric procedures
- Slightly Alkaline pH – pH ≥ 8.5 (10% suspension at 25 °C)
- ≥60% of Particles <0.1 mm – Ensures efficient and consistent filtration performance
Specifications
| Property | Value |
|---|---|
| Product Name | Celite® 545 |
| CAS Number | 68855-54-9 |
| Formula | SiO₂ |
| Molar Mass | 60.08 g/mol |
| pH (10% suspension, 25 °C) | ≥8.5 |
| Loss on Ignition (600 °C) | ≤0.6% |
| Particle Size (<0.1 mm) | ≥60% |
| Grade | GPR RECTAPUR® |
| Appearance | White, free-flowing powder |
| Storage Conditions | Ambient |
| Hazard Classification | GHS07 (Irritant) |
Applications
- Laboratory Filtration – Clarification of suspensions, protein solutions, and chemical precipitates
- Pharmaceutical Processing – Removal of particulates from active pharmaceutical ingredients
- Analytical Chemistry – Support for gravimetric and vacuum filtration setups
- Food & Beverage Industry – Filtration of liquids such as sugar solutions, oils, and beverages
- Industrial Applications – Catalyst support, clarification of process liquids
Ordering Information
| Catalog Number | Pack Size | Packaging Type |
|---|---|---|
| 22557.230 | 250 g | HDPE bottle |
| 22557.290 | 1 kg | PP bucket |
| 22557.360 | 5 kg | HDPE bucket |
| 22557.460 | 25 kg | LDPE bag |
Celite® 545 GPR RECTAPUR® is a high-purity filter aid offering superior particle retention and filtration speed. Its fine particle size, low ignition residue, and consistent performance make it an essential component in both research and industrial-scale filtration workflows.
- Pack Size: 250g 1kg 5kg 25kg