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Celite® 500 fine

filter aid, dried, untreated

Diatomaceous earth, Kieselguhr, Diatomaceous silica
CAS Number:
MDL number:
PubChem Substance ID:




Al2O3, 3.8%
CaO, 0.5%
Fe2O3, 1.2%
Na2O + K2O, 1.1%
SiO2, 85.8%


3.2-7.0% loss on ignition, 900 °C

median particle size

13.0 μm (acc. to granulometric method (laser sizer))


~7 (25 °C, 10% in aq. suspension)

SMILES string




InChI key


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Highly insoluble, inert material for use as a filtration aid.


Not Intended for cGMP Parenteral Pharmaceutical Manufacturing

Other Notes

Legal Information

Celite is a registered trademark of Imerys Minerals California, Inc.

Certificate of Analysis

Certificate of Origin

Eunhee Cho et al.
Acta biomaterialia, 8(6), 2223-2232 (2012-03-13)
In situ cross linkable polyethylene glycol (PEG)-based polymers play an increasing role in surgical practice as sealants that provide a barrier to fluid/gas leakage and adhesion formation. This study investigated the gelation behavior and physical properties of hydrogels formed from...
Selective liquid-phase oxidation of alcohols catalyzed by a silver-based catalyst promoted by the presence of ceria.
Beier MJ, et al.
J. Catal., 266(2), 320-330 (2009)
Goran G Andrić et al.
Journal of economic entomology, 105(2), 670-678 (2012-05-23)
Insecticidal potential of natural zeolites and diatomaceous earths originating from Serbia against Sitophilus oryzae (L.) and Tribolium castaneum (Herbst) was evaluated. Two natural zeolite formulations (NZ and NZ Modified) were applied to wheat at rates of 0.50, 0.75, and 1.0...
James F Meadow et al.
Microbial ecology, 65(1), 171-179 (2012-08-29)
Geothermal influenced soils exert unique physical and chemical limitations on resident microbial communities but have received little attention in microbial ecology research. These environments offer a model system in which to investigate microbial community heterogeneity and a range of soil...
Manpreet Bariana et al.
International journal of pharmaceutics, 443(1-2), 230-241 (2013-01-05)
Diatomaceous earth (DE), or diatomite silica microparticles originated from fossilized diatoms are a potential substitute for its silica-based synthetic counterparts to address limitations in conventional drug delivery. This study presents the impact of engineered surface chemistry of DE microparticles on...

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