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03584

Sigma-Aldrich

Kaolinite

natural

Synonym(s):

Aluminum silicate

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About This Item

Linear Formula:
Al2O3 · 2SiO2 · 2H2O
CAS Number:
1318-74-7
Molecular Weight:
258.16
EC Number:
215-286-4
MDL number:
MFCD00077645
UNSPSC Code:
12352106
PubChem Substance ID:
329747737
NACRES:
NA.22
Pricing and availability is not currently available.

form

powder

Quality Level

100

quality

natural

SMILES string

O=[Si]=O.O=[Al]O[Al]=O

InChI

1S/2Al.O2Si.3O/c;;1-3-2;;;

InChI key

HNPSIPDUKPIQMN-UHFFFAOYSA-N

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Application

Kaolinite can be used:
  • In the preparation of of polysialate polymers.[1]
  • To prepare mullite composites by sintering kaolinite and alumina.[2]
  • To synthesize microporous materials such as zeolite Linde Type A (LTA)[3] and kaoline based silicoaluminophosphate (SAPO) molecular sieves.[4]
  • In the synthesis of terbium pyridine-picolinate grafted kaoline, as a luminescent hybrid material.[5]
  • As a filler and a coating pigment in the paper industry.[6]

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCM7452
BCCK5067
BCCL1959
BCCJ1019
BCCG9754

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Synthesis and characterisation of materials based on inorganic polymers of alumina and silica: sodium polysialate polymers.
Barbosa V F, et al.
International Journal of Inorganic Materials, 2(4), 309-317 (2000)
Nucleation and growth history of zeolite LTA synthesized from kaolinite by two different methods.
Rios C A, et al.
Applied Clay Science, 42(3-4), 446-454 (2009)
Synthesis, characterization and crystallization mechanism of SAPOs from natural kaolinite.
Wang T, et al.
Microporous and Mesoporous Materials : The Official Journal of the International Zeolite Association, 136(1-3), 138-147 (2010)
Engineered clay products for the paper industry.
Murray H H and Kogel J E
Applied Clay Science, 29(3-4), 199-206 (2005)
Alexander Incledion et al.
Biomolecules, 11(1) (2021-01-21)
Clays attributed to have medicinal properties have been used since prehistoric times and are still used today as complementary medicines, which has given rise to unregulated "bioceutical" clays to treat skin conditions. Recently, clays with antibacterial characteristics have been proposed
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Questions

1–4 of 4 Questions  

  1. 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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  2. 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

      Helpful?

  3. このカオリナイトのアスペクト比が知りたいのですが、原産地はわかりますでしょうか。

    1 answer

    1. The aspect ratio of this kaolinite is not determined.

      Regarding the origin, a lot specific Certificate of Origin can be supplied by our Technical Service team who can assist you with further. We kindly ask you to navigate to the link https://www.sigmaaldrich.com/techservice, click on "Product Documentation" under the Products Section with all the required information so that a member of our team can reach out to you to assist further. Thank you.

      Helpful?

  4. Does this kaolinite have a known methylene blue value?

    1 answer

    1. A methylene blue value is not determined for this product.

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