Sodium sulfite

Name: Sodium sulfite
Brand: SIGALD

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

EC Number:

231-821-4

MDL number:

MFCD00003503

UNSPSC Code:

12352302

PubChem Substance ID:

329753771

NACRES:

NA.21

Assay:

98-100.0% (iodometric)

Form:

solid

Key Documents

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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

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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Show Differences

1 of 4

This Item	239321	13471	S0505
Sigma-Aldrich 31454 Sodium sulfite	Sigma-Aldrich 239321 Sodium sulfite	Sigma-Aldrich 13471 Sodium sulfite	Sigma-Aldrich S0505 Sodium sulfite
form solid	form powder or crystals	form solid	form powder or crystals
assay 98-100.0% (iodometric)	assay ≥98.0%	assay 95.0-100.0% (iodometric)	assay ≥98%
Quality Level 100	Quality Level 200	Quality Level 100	Quality Level 100
grade puriss. p.a.	grade -	grade puriss.	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 residual solvents, complies, ≤0.001% heavy metals (as Pb), ≤0.05% thiosulfate (S₂O₃)	impurities -
anion traces chloride (Cl^-): ≤50 mg/kg	anion traces chloride (Cl^-): ≤0.02%	anion traces chloride (Cl^-): ≤200 mg/kg	anion traces -

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.[1]

Application

Sodium sulfite was used in the preparation of films based on wheat gluten.[2]

Supplementary Hazards

EUH031

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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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)

Discovery and targeted LC-MS/MS of purified polerovirus reveals differences in the virus-host interactome associated with altered aphid transmission.

Michelle Cilia et al.

PloS one, 7(10), e48177-e48177 (2012-11-03)

Circulative transmission of viruses in the Luteoviridae, such as cereal yellow dwarf virus (CYDV), requires a series of precisely orchestrated interactions between virus, plant, and aphid proteins. Natural selection has favored these viruses to be retained in the phloem to

Pretreatment of Agave americana stalk for enzymatic saccharification.

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

Performance of a pilot-scale packed bed reactor for perchlorate reduction using a sulfur oxidizing bacterial consortium.

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

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