799343

Sigma-Aldrich

Sodium metabisulfite

anhydrous, free-flowing, Redi-Dri, ReagentPlus®, ≥99%

Synonym(s):
Sodium disulfite, Sodium pyrosulfite
Linear Formula:
Na2S2O5
CAS Number:
Molecular Weight:
190.11
EC Number:
MDL number:
PubChem Substance ID:
Pricing and availability is not currently available.

Quality Level

grade

anhydrous

product line

ReagentPlus®
Redi-Dri

assay

≥99%

form

powder

quality

free-flowing

mp

>300 °C (lit.)

SMILES string

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

InChI

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

InChI key

HRZFUMHJMZEROT-UHFFFAOYSA-L

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Related Categories

Packaging

1, 2.5 kg in poly bottle
500 g in poly bottle

Other Notes

As a solid, this product is sodium metabisulfite, Na2S2O5. Dissolved in water, it yields NaHSO3.

Legal Information

ReagentPlus is a registered trademark of Sigma-Aldrich Co. LLC
Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

Pictograms

CorrosionExclamation mark

Signal Word

Danger

Hazard Statements

Supp Hazards

EUH031

RIDADR

NONH for all modes of transport

WGK Germany

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
I U Nieves et al.
Bioresource technology, 102(13), 6959-6965 (2011-05-03)
Microaeration (injecting air into the headspace) improved the fermentation of hemicellulose hydrolysates obtained from the phosphoric acid pretreatment of sugarcane bagasse at 170°C for 10 min. In addition, with 10% slurries of phosphoric acid pretreated bagasse (180°C, 10 min), air...
Jeffrey N Hemenway et al.
Journal of pharmaceutical sciences, 101(9), 3305-3318 (2012-05-23)
A 2,4-dinitrophenylhydrazine (DNPH) precolumn derivatization high-performance liquid chromatography-ultraviolet detection (HPLC-UV) method was developed to quantify levels of formaldehyde and acetaldehyde in polyethylene glycol (PEG) solutions. Formic acid and acetic acid were quantified by HPLC-UV. Samples of neat and aqueous PEG...
Ilgaz Akdogan et al.
Toxicology and industrial health, 27(9), 771-778 (2011-04-23)
Sulfite, which is continuously formed in the body during metabolism of sulfur-containing amino acids, is commonly used in preservatives. It has been shown that there are toxic effects of sulfite on many cellular components. The aim of this study was...
David W Roberts et al.
Contact dermatitis, 66(3), 123-127 (2012-02-11)
Skin-sensitizing chemicals that cause allergic contact dermatitis do so by reacting with self-proteins such that the modified structure becomes antigenic. The reaction chemistry involved is well characterized, but there are exceptions, such as the occasional allergen sodium metabisulfite. To identify...
Juan García-Gavín et al.
Contact dermatitis, 67(5), 260-269 (2012-10-09)
Sulfites, preservatives and antioxidants used in the cosmetic, pharmaceutical and food industry are contact allergens whose relevance seems to be difficult to establish. To perform a retrospective study on patients patch tested with a sulfite. Materials and methods. Between 1990...

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