MilliporeSigma
All Photos(1)

Documents

1.05107

Supelco

Potassium disulfate (Potassium pyrosulfate)

for analysis EMSURE® ACS

Sign Into View Organizational & Contract Pricing

Synonym(s):
Potassium disulfate (Potassium pyrosulfate), Potassium pyrosulfate
Empirical Formula (Hill Notation):
K2O7S2
CAS Number:
Molecular Weight:
254.32
MDL number:
EC Index Number:
232-216-8

grade

ACS reagent

Quality Level

product line

EMSURE®

assay

97.5-100.0% (K2S2O7 basis, acidimetric)

form

solid

impurities

≤0.01% Insoluble and by ammoniumhydroxide precipitated matter
≤2.5% Water
37.5-38.6% Acidity (as H2SO4)

pH

0.8 (20 °C, 50 g/L in H2O)

mp

325 °C

bulk density

830 kg/m3

anion traces

chloride (Cl-): ≤0.0005%
phosphate (PO43-): ≤0.001%

cation traces

Al: ≤0.001%
As: ≤0.0005%
Ca: ≤0.002%
Fe: ≤0.0005%
Mg: ≤0.0005%
N: ≤0.002%
Na: ≤0.01%
heavy metals (as Pb): ≤0.001%

storage temp.

no temp limit

InChI

1S/2K.H2O7S2/c;;1-8(2,3)7-9(4,5)6/h;;(H,1,2,3)(H,4,5,6)/q2*+1;/p-2

InChI key

KAQHZJVQFBJKCK-UHFFFAOYSA-L

Related Categories

Linkage

Replaces: PX1581; PX1581-1; PX1581-3; PX1581-20; PX1581-5W; PX1581-5

Analysis Note

Assay (acidimetric, as K₂S₂O₇): 97.5 - 100.0 %
Acidity (as H₂SO₄): 37.5 - 38.6 %
Insoluble and by ammoniumhydroxide precipitated matter: ≤ 0.01 %
Chloride (Cl): ≤ 0.0005 %
Phosphate (PO₄): ≤ 0.001 %
Total nitrogen (N): ≤ 0.002 %
Heavy metals (as Pb): ≤ 0.001 %
Al (Aluminium): ≤ 0.001 %
As (Arsenic): ≤ 0.0005 %
Ca (Calcium): ≤ 0.002 %
Fe (Iron): ≤ 0.0005 %
Mg (Magnesium): ≤ 0.0005 %
Na (Sodium): ≤ 0.01 %
Water (H₂O): ≤ 2.5 %
Conforms ACS.

Legal Information

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

pictograms

CorrosionSkull and crossbones

signalword

Danger

Hazard Classifications

Acute Tox. 3 Inhalation - Eye Dam. 1 - Skin Corr. 1A

Storage Class

6.1B - Non-combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk_germany

WGK 3


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).

Example:

T1503
Product Number
-
25G
Pack Size/Quantity

Additional examples:

705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service