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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About This Item
Recommended Products
grade
reagent grade
Quality Level
form
powder
composition
Al2O3, 50-57%
concentration
50.0-57.5% (Al (as Al2O3), EDTA titration)
solubility
water: insoluble
density
2.42 g/cm3 at 20 °C
SMILES string
O[Al](O)O
InChI
1S/Al.3H2O/h;3*1H2/q+3;;;/p-3
InChI key
WNROFYMDJYEPJX-UHFFFAOYSA-K
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General description
Application
- In the preparation of Li2O–Al2O3–SiO2 (LAS) glass-ceramic systems.
- As a aluminum precursor in the preparation of alumina.
Other Notes
Storage Class Code
13 - Non Combustible Solids
WGK
nwg
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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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What is the solubility of aluminum hydroxide product 239186 (CAS 21645-51-2)?
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The product is insoluble in water but is soluble in alkaline aqueous solution, HCl, and H2SO4 solution.
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