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305553

Sigma-Aldrich

Sodium hexametaphosphate

crystalline, +200 mesh, 96%

Synonym(s):

SHMP, Calgon, Phosphate glass, water soluble, Polyphosphate sodium salt, Sodium polyphosphate

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About This Item

CAS Number:
68915-31-1
EC Number:
272-808-3
MDL number:
MFCD00134118
UNSPSC Code:
12352302
PubChem Substance ID:
329753536
NACRES:
NA.22
Assay:
96%
form:
crystalline
Pricing and availability is not currently available.

Quality Level

200

Assay

96%

form

crystalline

particle size

+200 mesh

SMILES string

[Na+].[Na+].[P](=O)([O-])([O-])O[P](=O)(O)O

InChI

1S/2Na.H4O7P2/c;;1-8(2,3)7-9(4,5)6/h;;(H2,1,2,3)(H2,4,5,6)/q2*+1;/p-2

InChI key

GYQBBRRVRKFJRG-UHFFFAOYSA-L

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General description

Sodium hexametaphosphate is an inorganic polyphosphate salt commonly used as a corrosion inhibitor[1], emulsifying agent[2] and as a tooth whitening agent in dentifrice formulations.[3]

Sodium hexametaphosphate is a water-soluble inorganic stabilizing agent used as a surfactant to decrease the zeta potential of halloysite suspensions.[4] [5]

Application

Sodium hexametaphosphate has been used as a polyphosphate anion source to prepare hydrated calcium polyphosphate powder.[6] It can be used as a deflocculant to prepare suspensions of kaolinite and ceramic grade kaolin.[7]

Biochem/physiol Actions

Intended for the cytologic demonstration of Naphthol AS-D Chloroacetate Esterase in blood, bone marrow films or tissue touch preparations.

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

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
MKCV5932
MKCW7625
MKCV5931
MKCV7985
0000257152

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Amy M Kahler et al.
Water, 7(3), 1202-1216 (2015-11-05)
In this study, hollow-fiber ultrafiltration (UF) was assessed for recovery of
Synthesis of BaSO4 nanoparticles by precipitation method using sodium hexa metaphosphate as a stabilizer
Asha G et al.
Solid State Communications, 150, 386-388 (2010)
Amorphous calcium phosphate powder synthesized from calcium acetate and polyphosphoric acid for bioceramics application.
Safronova T V, et al.
Ceramics International, 43(1), 1310-1317 (2017)
Dispersion of phyllosilicates in aqueous suspensions: Role of the nature and amount of surfactant
Nadia H et al.
Journal of Colloid and Interface Science, 425, 67-74 (2014)
Final report on the safety assessment of Sodium Metaphosphate, Sodium Trimetaphosphate, and Sodium Hexametaphosphate.
Lanigan R S.
International Journal of Toxicology, 20, 75-89 (2001)
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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/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. What is the average degree of polymerization?

    1 answer

    1. The degree of polymerization has not been determined for this product. Historically, chain lengths have ranged from 9.5 to 14.5 units.

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