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Sigma-Aldrich

Diatomaceous earth

Synonym(s):

Diatomaceous earth, flux-calcined

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About This Item

CAS Number:
68855-54-9
MDL number:
MFCD00132803
UNSPSC Code:
11101527
PubChem Substance ID:
329755685
NACRES:
NA.21
Pricing and availability is not currently available.

form

powder

particle size

150 mesh (<=12%, Tyler sieve retain)

SMILES string

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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General description

Diatomaceous earth is natural amorphous silica formed from the fossilized skeletons of diatoms. It has high water and oil absorption ability.[1] The potential toxicity of different samples of DE has been assessed.[2]

Application

Diatomaceous earth may be used as an adsorbent for column chromatography.[3]
It may be used in the synthesis of the following:
  • Chitosan modified DE for the abstraction of humic acid from raw water.[4]
  • High purity solar grade silicon (SOG-Si).[5]
  • Porous silica ceramics.[6]
  • Diatomite-based composite with enhanced sorption characteristics.[7]

Pictograms

Health hazard
GHS08

Signal Word

Danger

Hazard Statements

H372

Precautionary Statements

P260 - P264 - P270 - P314 - P501

Hazard Classifications

STOT RE 1 Inhalation

Target Organs

Lungs

Storage Class Code

6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
MKCJ8320
MKCK7893
MKCH2050
MKCG9922
MKCG8305

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Porous ceramic monoliths based on diatomite.
Saponjic A, et al.
Ceramics International, 41(8), 9745-9752 (2015)
High purity silicon materials prepared through wet-chemical and electrochemical approaches.
Homma T, et al.
Electrochimica Acta, 179, 512-518 (2015)
Preparation of novel diatomite-based composites: applications in organic ef?uents sorption.
Khelifa N, et al.
Desalination and Water Treatment, 1-10 (2015)
Study on Adsorption Removal of Humic Acid in Water by Modified Clays.
Wang YH, et al.
Applied Mechanics and Materials, 707, 247-250 (2015)
The global variability of diatomaceous earth toxicity: a physicochemical and in vitro investigation.
Nattrass C, et al.
Journal of Occupational Medicine and Toxicology (London, England), 10(1), 23-23 (2015)
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Questions

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  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  3. i need to know the information regarding the textural properties of diatomite

    1 answer

    1. The textural properties of this product have not been determined.

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