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310093

Sigma-Aldrich

Magnesium hydroxide

reagent grade, 95%

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About This Item

Linear Formula:
Mg(OH)2
CAS Number:
1309-42-8
Molecular Weight:
58.32
EC Number:
215-170-3
MDL number:
MFCD00011104
UNSPSC Code:
12352302
PubChem Substance ID:
329753615
NACRES:
NA.55
grade:
reagent grade
form:
powder
Pricing and availability is not currently available.

grade

reagent grade

Assay

95%

form

powder

pH

9.5-10.5

mp

350 °C (lit.)

SMILES string

O[Mg]O

InChI

1S/Mg.2H2O/h;2*1H2/q+2;;/p-2

InChI key

VTHJTEIRLNZDEV-UHFFFAOYSA-L

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General description

Magnesium hydroxide is a low corrosive inorganic compound that is widely used as an acid- and halogen-free flame retardant and smoke suppressant in various polymeric matrices in the plastics industry[1]. It is a magnesium oxide intermediate that can be used in refractory, water and wastewater treatment, fuel gas desulfurization, pulp and paper industry, and as a fertilizer additive[2][3].

Application

Magnesium hydroxide can be used as:
  • A filler to prepare kenaf fiber-reinforced polymer composites[4].
  • A pH-adjusting agent in the production of succinic acid[5].

Storage Class Code

13 - Non Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
STBL2568
STBK7194
STBK6841
STBJ4263
STBJ0339

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Production of magnesium hydroxide from magnesium silicate for the purpose of CO2 mineralisation-Part 1: Application to Finnish serpentinite.
Nduagu E, et al.
Minerals Engineering, 30, 75-86 (2012)
Flame retardant effects of magnesium hydroxide.
Rothon RN and Hornsby PR.
Polymer Degradation and Stability, 54(2), 383-385 (1996)
Discolouration of polypropylene-based compounds containing magnesium hydroxide
Titelman G, et al.
Polymer Degradation and Stability, 77, 345-352 (2002)
Conversion of magnesium fluoride to magnesium hydroxide
Booster J, et al.
Minerals Engineering, 16, 273-281 (2003)
Kinetics of magnesium hydroxide precipitation from sea bittern
Alamdari A, et al.
Chemical Engineering and Processing, 47, 215-221 (2008)
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Questions

1–2 of 2 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

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