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239186

Aluminum hydroxide

reagent grade

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About This Item

Linear Formula:
Al(OH)3
CAS Number:
Molecular Weight:
78.00
NACRES:
NA.55
PubChem Substance ID:
UNSPSC Code:
12352305
EC Number:
244-492-7
MDL number:

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Product Name

Aluminum hydroxide, reagent grade

InChI key

WNROFYMDJYEPJX-UHFFFAOYSA-K

InChI

1S/Al.3H2O/h;3*1H2/q+3;;;/p-3

SMILES string

O[Al](O)O

grade

reagent grade

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

Quality Level

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1 of 4

This Item
1.0109310175021.01091
concentration

50.0-57.5% (Al (as Al2O3), EDTA titration)

concentration

-

concentration

-

concentration

-

grade

reagent grade

grade

-

grade

pharmaceutical primary standard

grade

-

Quality Level

100

Quality Level

100

Quality Level

-

Quality Level

200

form

powder

form

-

form

powder

form

powder

solubility

water: insoluble

solubility

-

solubility

water: insoluble

solubility

water: insoluble at 20 °C

density

2.42 g/cm3 at 20 °C

density

2.42 g/cm3 at 20 °C

density

2.42 g/cm3 at 20 °C

density

2.42 g/cm3 at 20 °C

Application

Aluminum hydroxide may be used:
  • In the preparation of Li2O–Al2O3–SiO2 (LAS) glass-ceramic systems.
  • As a aluminum precursor in the preparation of alumina.

General description

Aluminum hydroxide (Al (OH)3) is an amphoteric compound, soluble in both base and acids. It is used as a precursor for alumina catalysts and flame-retardant materials. Aluminum hydroxide is primarily used as a feedstock to produce other aluminum compounds, including sodium aluminate, activated alumina, aluminum nitrate, zeolites, polyaluminum chloride, aluminum chloride, and specialty calcined aluminas.

Other Notes

may contain aluminum carbonate species

Storage Class

13 - Non Combustible Solids

wgk

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable


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Arsenate adsorption on amorphous aluminum hydroxide.
Anderson MA, et al.
Journal of Colloid and Interface Science, 54(3), 391-399 (1976)
Utilization of alum sludge for producing aluminum hydroxide and layered double hydroxide.
Wang LY, et al.
Ceramics International, 40(10), 15503-15514 (2014)
Hydrothermal extraction of potassium from potassic quartz syenite and preparation of aluminum hydroxide.
Ma X, et al.
International Journal of Mineral Processing, 147, 10-17 (2016)
Biosorption of fluoride from drinking water using spent mushroom compost biochar coated with aluminum hydroxide.
Chen GJ, et al.
Desalination and Water Treatment, 1-11 (2015)
Property enhancement of kenaf fiber reinforced composites by in situ aluminum hydroxide impregnation.
Xia C, et al.
Industrial Crops and Products, 79, 131-136 (2016)

Questions

1–3 of 3 Questions  
  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/418/501/product-dating-information-06-25-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

      Helpful?

  3. What is the solubility of aluminum hydroxide product 239186 (CAS 21645-51-2)?

    1 answer
    1. The product is insoluble in water but is soluble in alkaline aqueous solution, HCl, and H2SO4 solution.

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