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1.05107

Supelco

Potassium disulfate (Potassium pyrosulfate)

for analysis EMSURE® ACS

Synonym(s):

Potassium disulfate (Potassium pyrosulfate), Potassium pyrosulfate

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About This Item

Empirical Formula (Hill Notation):
K2O7S2
CAS Number:
7790-62-7
Molecular Weight:
254.32
MDL number:
MFCD00011385
UNSPSC Code:
12352302
EC Index Number:
232-216-8
NACRES:
NA.21
Assay:
97.5-100.0% (K2S2O7 basis, acidimetric)
grade:
ACS reagent
form:
solid
solubility:
water: soluble (ca.25.4 g/l at 20 °C (68 °F))

grade

ACS reagent

Quality Level

300

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

solubility

water: soluble (ca.25.4 g/l at 20 °C (68 °F))

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

SMILES string

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

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

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.

Other Notes

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

Legal Information

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

Pictograms

Skull and crossbonesCorrosion
GHS06,GHS05

Signal Word

Danger

Hazard Statements

H314,H331

Hazard Classifications

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

Storage Class Code

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

WGK

WGK 3

Certificates of Analysis (COA)

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