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Sigma-Aldrich

Potassium sulfate

Potassium sulfate

ReagentPlus®, ≥99.0%

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About This Item

Linear Formula:
K2SO4
CAS Number:
7778-80-5
Molecular Weight:
174.26
EC Number:
231-915-5
MDL number:
MFCD00011388
UNSPSC Code:
12352302
PubChem Substance ID:
329820055
NACRES:
NA.55
grade:
reagent
form:
powder
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grade

reagent

Quality Level

200

product line

ReagentPlus®

Assay

≥99.0%

form

powder

SMILES string

[K+].[K+].[O-]S([O-])(=O)=O

InChI

1S/2K.H2O4S/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2

InChI key

OTYBMLCTZGSZBG-UHFFFAOYSA-L

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General description

Potassium sulfate is an inorganic salt that can be prepared by reacting phosphogypsum and potassium chloride.[1] It forms needlelike mullite particles on heating with aluminum sulfate (Al2(SO4)3) and silicon dioxide (SiO2).[2] Its application to the soil has been reported to minimize the bronzing of rice plants.[3] Its surface integration growth kinetics has been obtained in the temperature range of 20-50°C.[4] The theoretical heat capacity curve of potassium sulfate in vapor phase has been obtained.[5]

Application

Potassium sulfate may be used as a sulfonating agent in the preparation of 4′-dibenzo-18-crown-6-sulfonic acid via sulfonation of dibenzo-18-crown-6.[6]

Legal Information

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
0000426984
0000426983
0000426983
0000426984
0000385002

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Thermodynamics of the vaporization processes for potassium sulfate.
Eliezer I and Howald RA.
J. Chem. Phys. , 65(8), 3053-3062 (1976)
Growth and dissolution kinetics of potassium sulfate crystals in an agitated vessel.
Garside J, et al.
Industrial & Engineering Chemistry Fundamentals, 13(4), 299-305 (1974)
Rice bronzing in Nigeria caused by nutrient imbalances and its control by potassium sulfate application.
Yamauchi M.
Plant and Soil, 117(2), 275-286 (1989)
Sulfonation of benzocrown ethers by potassium sulfate in polyphosphoric acid.
Grebenyuk AD, et al.
Chemistry of Heterocyclic Compounds, 37(7), 822-826 (2001)
Conversion of phosphogypsum to potassium sulfate.
Aagli A, et al.
Journal of Thermal Analysis and Calorimetry, 82(2), 395-399 (2005)
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Questions

1–3 of 3 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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  3. 안녕하세요. 해당 제품 potassium sulfate (CAS Number : 7778-80-5) 를 사용해 Copper seed layer etching이 가능할까요? 해당 제품을 Cu etchant로 사용하는 것이 가능한지 궁금합니다. 감사합니다.

    1 answer

    1. Potassium sulfate may react with copper, but generally, potassium persulfate or ammonia persulfate is used for copper etching, for example, 216224 or 248614.
      https://www.sigmaaldrich.com/product/sigald/216224
      https://www.sigmaaldrich.com/product/sigald/248614

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