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31454

Sodium sulfite

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

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About This Item

Linear Formula:
Na2SO3
CAS Number:
7757-83-7
Molecular Weight:
126.04
NACRES:
NA.21
PubChem Substance ID:
329753771
UNSPSC Code:
12352302
EC Number:
231-821-4
MDL number:
MFCD00003503
Assay:
98-100.0% (iodometric)
Form:
solid

Key Documents

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Product Name

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

InChI key

GEHJYWRUCIMESM-UHFFFAOYSA-L

InChI

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

SMILES string

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

agency

USP/NF
reag. Ph. Eur.

grade

puriss. p.a.

assay

98-100.0% (iodometric)

form

solid

impurities

≤0.001% heavy metals (as Pb)
≤0.02% thiosulfate (S2O3)

pH

9.0-10.5 (25 °C, 126 g/L)

anion traces

chloride (Cl-): ≤50 mg/kg

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

Quality Level

100

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1 of 4

This Item
239321S0505S4672
Sodium sulfite puriss. p.a., reag. Ph. Eur., anhydrous, 98-100.0% (iodometric)

Sigma-Aldrich

31454

Sodium sulfite

Sodium sulfite ACS reagent, ≥98.0%

Sigma-Aldrich

239321

Sodium sulfite

Sodium sulfite ≥98%

Sigma-Aldrich

S0505

Sodium sulfite

Sodium sulfite BioXtra, ≥98%

Sigma-Aldrich

S4672

Sodium sulfite

form

solid

form

powder or crystals

form

powder or crystals

form

powder or crystals

assay

98-100.0% (iodometric)

assay

≥98.0%

assay

≥98%

assay

≥98%

Quality Level

100

Quality Level

200

Quality Level

100

Quality Level

200

grade

puriss. p.a.

grade

-

grade

-

grade

-

impurities

≤0.001% heavy metals (as Pb), ≤0.02% thiosulfate (S2O3)

impurities

Free acid, passes test, ≤0.005% insolubles, ≤0.03 meq/g Titr. free base

impurities

-

impurities

≤0.005% Insoluble matter, ≤5 ppm Phosphorus (P)

anion traces

chloride (Cl-): ≤50 mg/kg

anion traces

chloride (Cl-): ≤0.02%

anion traces

-

anion traces

chloride (Cl-): ≤0.02%

Application

Sodium sulfite was used in the preparation of films based on wheat gluten.[1]

General description

Sodium sulfie is an inorganic sodium salt. Rapid-mixing method has been proposed to investigate kinetics of the reaction between oxygen and sodium sulfite.[2]

supp_hazards

EUH031

Storage Class

11 - 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
MKCV9233
MKCW8521
0000246227
0000246227
MKCR2699

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Reaction kinetics of sodium sulfite oxidation by the rapid-mixing method.
Barron CH and O'Hern HA.
Chemical Engineering Science, 21(5), 397-404 (1966)
New plasticizers for wheat gluten films.
Irissin-Mangata J, et al.
European Polymer Journal, 37(8), 1533-1541 (2001)
Qiang Yang et al.
Bioresource technology, 126, 336-340 (2012-11-06)
Agave americana is one of commonly grown agave species but currently less valuable because its large flower stalk cannot be used for producing alcoholic beverage. In the present study, the stalk was pretreated with dilute acid (DA), sulfite (SPORL), and
Amber R Boles et al.
Biotechnology and bioengineering, 109(3), 637-646 (2011-10-22)
A novel sulfur-utilizing perchlorate reducing bacterial consortium successfully treated perchlorate (ClO₄⁻) in prior batch and bench-scale packed bed reactor (PBR) studies. This study examined the scale up of this process for treatment of water from a ClO ₄⁻ and RDX contaminated
Jingang Wang et al.
Chemosphere, 91(3), 351-357 (2012-12-26)
This paper presents a simple, easy and reliable method for determination of EDTA (ethylenediaminetetraacetic acid) in aqueous system. Using EDTA chelating with ferric irons, an excessive amount of Fe(3+) was added to EDTA solution, and Fe(3+) in excess was reduced
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