MilliporeSigma
All Photos(1)

1.06528

Supelco

Sodium disulfite

(sodium metabisulfite) for analysis EMSURE® ACS,Reag. Ph Eur

Synonym(s):
Sodium disulfite, Sodium metabisulfite, Sodium pyrosulfite, Disulfite, Pyrosulfite
Empirical Formula (Hill Notation):
Na2O5S2
CAS Number:
Molecular Weight:
190.11
MDL number:
EC Index Number:
231-673-0

Quality Level

grade

ACS reagent

Agency

reag. Ph. Eur.

product line

EMSURE®

assay

98.0-100.5% (iodometric)

form

powder

potency

1540 mg/kg LD50, oral (Rat)
>2000 mg/kg LD50, skin (Rat)

impurities

≤0.005% Insoluble matter

pH

3.5-5 (20 °C, 50 g/L in H2O)

mp

150 °C (decomposition)

solubility

650 g/L

density

2.36 g/cm3 at 20 °C

bulk density

1000‑1200 kg/m3

anion traces

chloride (Cl-): ≤0.005%
thiosulfate (S2O32-): ≤0.05%passes test

cation traces

As: ≤0.0001%
Fe: ≤0.0005%
heavy metals (as Pb): ≤0.001%

storage temp.

2-30°C

InChI

1S/2Na.H2O5S2/c;;1-6(2)5-7(3)4/h;;(H,1,2)(H,3,4)/q2*+1;/p-2

InChI key

LDTLADDKFLAYJA-UHFFFAOYSA-L

Looking for similar products? Visit Product Comparison Guide

Analysis Note

Assay (iodometric): 98.0 - 100.5 %
Identity: passes test
Appearance of solution: passes test
pH-value (5 %; water): 3.5 - 5.0
Insoluble matter: ≤ 0.005 %
Chloride (Cl): ≤ 0.005 %
Thiosulfate (S₂O₃):
≤ 0.05 %
: passes test
Heavy metals (as Pb): ≤ 0.001 %
As (Arsenic): ≤ 0.0001 %
Fe (Iron): ≤ 0.0005 %

Legal Information

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

Pictograms

CorrosionExclamation mark

Signal Word

Danger

Hazard Statements

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1

Supplementary Hazards

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Quality

Enter Lot Number to search for Certificate of Quality (COQ).

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