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Sigma-Aldrich

Potassium pyrophosphate

97%

Synonym(s):

Potassium diphosphate tetrabasic, Tetrapotassium diphosphate

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About This Item

Linear Formula:
K4P2O7
CAS Number:
7320-34-5
Molecular Weight:
330.34
EC Number:
230-785-7
MDL number:
MFCD00011393
UNSPSC Code:
12352302
PubChem Substance ID:
24859317
NACRES:
NA.23
Assay:
97%
form:
solid
Pricing and availability is not currently available.

Quality Level

200

Assay

97%

form

solid

mp

1300 °C (lit.)

SMILES string

[K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])([O-])=O

InChI

1S/4K.H4O7P2/c;;;;1-8(2,3)7-9(4,5)6/h;;;;(H2,1,2,3)(H2,4,5,6)/q4*+1;/p-4

InChI key

RYCLIXPGLDDLTM-UHFFFAOYSA-J

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General description

Potassium pyrophosphate (K4P2O7) is a water soluble, buffering and chelating agent. It can also be used as an ionic dispersant to form a low viscous solution.[1][2][3] It is a biocompatible and a non-toxic compound that is commonly used as a food additive.[4]

Application

K4P2O7 can be used in the preparation of an electrolytic solution, which can further be used in the fabrication of lithium ion batteries and arrays of copper nanowires.[5][6][7]

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H319

Hazard Classifications

Eye Irrit. 2

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
MKCW4996
STBL4244
STBL0996
MKCT6226
STBK8586

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Enhancing Ni-Sn nanowire lithium-ion anode performance by tailoring active/inactive material interfaces
Tian M, et al.
Journal of Power Sources, 196(23), 10207-10212 (2011)
Pyrophosphate coupling with chelant-enhanced soil flushing of field contaminated soils for heavy metal extraction
Yan DYS and Lo IMC
Journal of Hazardous Materials, 199(3), 51-57 (2012)
Development of a base set of toxicity tests using ultrafine TiO2 particles as a component of nanoparticle risk management
Warheit DB, et al.
Toxicology Letters, 171(3), 99-110 (2007)
Electrochemical exfoliation of graphite to produce graphene using tetrasodium pyrophosphate
Kumar MKP, et al.
Royal Society of Chemistry Advances, 5(32), 24846-24852 (2015)
Stable high areal capacity lithium-ion battery anodes based on three-dimensional Ni-Sn nanowire networks
Tian M, et al.
Journal of Power Sources, 211(32), 46-51 (2012)
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Questions

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  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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