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1.06657

Supelco

Sodium sulfite

anhydrous for analysis EMSURE® Reag. Ph Eur

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Linear Formula:
Na2SO3
CAS Number:
Molecular Weight:
126.04
MDL number:
EC Index Number:
231-821-4

agency

reag. Ph. Eur.

Quality Level

product line

EMSURE®

assay

97.0-100.5% (iodometric)

form

powder

potency

2610 mg/kg LD50, oral (Rat)

impurities

≤0.005% Insoluble matter
≤0.03 meq/g Titrable free base

pH

8.8-10 (20 °C, 50 g/L in H2O)

mp

>500 °C (decomposition)

density

2.63 g/cm3 at 20 °C

bulk density

1480 kg/m3

anion traces

chloride (Cl-): ≤0.02%
thiosulfate (S2O32-): ≤0.1%

cation traces

As: ≤0.0001%
Cu: ≤0.0005%
Fe: ≤0.001%
Pb: ≤0.0005%
Se: ≤0.0004%
Zn: ≤0.001%
heavy metals (as Pb): ≤0.0005%

storage temp.

2-30°C

SMILES string

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

InChI

1S/2Na.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2

InChI key

GEHJYWRUCIMESM-UHFFFAOYSA-L

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This Item
901916314541.06652
Sodium sulfite anhydrous for analysis EMSURE® Reag. Ph Eur

1.06657

Sodium sulfite

Sodium sulfite anhydrous, Redi-Dri™, reagent grade, ≥98%

901916

Sodium sulfite

Sodium sulfite puriss. p.a., reag. Ph. Eur., anhydrous, 98-100.0% (iodometric)

31454

Sodium sulfite

Sodium sulfite EMPROVE® ESSENTIAL, Ph. Eur., BP, NF, E 221

1.06652

Sodium sulfite

assay

97.0-100.5% (iodometric)

assay

≥98%

assay

98-100.0% (iodometric)

assay

-

Quality Level

300

Quality Level

-

Quality Level

-

Quality Level

500

pH

8.8-10 (20 °C, 50 g/L in H2O)

pH

9-10.5 (25 °C, 126 g/L)

pH

9.0-10.5 (25 °C, 126 g/L)

pH

8.8-10 (20 °C, 50 g/L in H2O)

anion traces

chloride (Cl-): ≤0.02%, thiosulfate (S2O32-): ≤0.1%

anion traces

-

anion traces

chloride (Cl-): ≤50 mg/kg

anion traces

-

cation traces

Cu: ≤0.0005%, Pb: ≤0.0005%, Zn: ≤0.001%, As: ≤0.0001%, Se: ≤0.0004%, Fe: ≤0.001%, heavy metals (as Pb): ≤0.0005%

cation traces

-

cation traces

As: ≤0.2 mg/kg, Ca: ≤50 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, Pb: ≤5 mg/kg, Se: ≤10 mg/kg, Zn: ≤10 mg/kg

cation traces

-

Analysis Note

Assay (iodometric): 97.0 - 100.5 %
Identity: passes test
Appearance of solution: passes test
Insoluble matter: ≤ 0.005 %
Free acid: passes test
Titrable free base: ≤ 0.03 meq/g
Chloride (Cl): ≤ 0.02 %
Thiosulfate (S₂O₃): ≤ 0.1 %
Heavy metals (as Pb): ≤ 0.0005 %
As (Arsenic): ≤ 0.0001 %
Cu (Copper): ≤ 0.0005 %
Fe (Iron): ≤ 0.001 %
Pb (Lead): ≤ 0.0005 %
Se (Selenium): ≤ 0.0004 %
Zn (Zinc): ≤ 0.001 %

Legal Information

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

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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Protocols

Preparation of a standard solution for Sulfite

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