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Sigma-Aldrich

Sodium tetrathionate dihydrate

purum p.a., ≥98.0% (T)

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About This Item

Linear Formula:
NaO3SS2SO3Na · 2H2O
CAS Number:
13721-29-4
Molecular Weight:
306.27
MDL number:
MFCD00150868
UNSPSC Code:
12352302
PubChem Substance ID:
329762997
NACRES:
NA.21

grade

purum p.a.

Quality Level

200

Assay

≥98.0% (T)

form

powder or crystals

impurities

10.5-20.0% water (Karl Fischer)

pH

4-6 (25 °C, 30.6 g/L)

solubility

H2O: 50 mg/mL, slightly turbid, colorless

density

2.1 g/mL at 25 °C (lit.)

anion traces

thiosulfate (S2O32-): ≤500 mg/kg

cation traces

Ca: ≤500 mg/kg
Cd: ≤50 mg/kg
Co: ≤50 mg/kg
Cu: ≤50 mg/kg
Fe: ≤50 mg/kg
K: ≤100 mg/kg
Ni: ≤50 mg/kg
Pb: ≤50 mg/kg
Zn: ≤50 mg/kg

storage temp.

2-8°C

SMILES string

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

InChI

1S/2Na.H2O6S4.2H2O/c;;1-9(2,3)7-8-10(4,5)6;;/h;;(H,1,2,3)(H,4,5,6);2*1H2/q2*+1;;;/p-2

InChI key

HAEPBEMBOAIUPN-UHFFFAOYSA-L

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General description

Sodium tetrathionate dihydrate is the dihydrate of sodium tetrathionate. It has been synthesized from sodium thiosulfate by iodine oxidation. Its crystals exhibit monoclinic crystal system and space group C23-C2.

Application

Sodium tetrathionate dihydrate may be used to compose the 0.2M Tris buffer in a study.

Other Notes

Thiosulfating agent; it reacts with thiols, e.g. cysteine to S-sulfo-thiols, used in the quantitative determination of total cysteine/cystine in proteins; Reversible inactivation of enzymes

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319,H335

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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[5] Determination of cystine and cysteine as S-sulfocysteine.
T Y Liu et al.
Methods in enzymology, 25, 55-60 (1972-01-01)
The interaction of oxidized glutathione, cystamine monosulfoxide, and tetrathionate with the-SH groups of rabbit muscle D-glyceraldehyde 3-phosphate dehydrogenase.
A PIHL et al.
The Journal of biological chemistry, 237, 1356-1362 (1962-04-01)
The mechanism of inactivation of glyceraldehyde 3-phosphate dehydrogenase by tetrathionate, o-iodosobenzoate, and iodine monochloride.
D J Parker et al.
The Journal of biological chemistry, 244(1), 180-189 (1969-01-10)
The Crystal Structure of Sodium Tetrathionate Dihydrate.
Foss O and Hordvik A.
Acta Chemica Scandinavica, 18(3), 662-662 (1964)
Mei Kikumoto et al.
Applied and environmental microbiology, 79(1), 113-120 (2012-10-16)
Thiosulfate dehydrogenase is known to play a significant role in thiosulfate oxidation in the acidophilic, obligately chemolithoautotroph, Acidithiobacillus ferrooxidans. Enzyme activity measured using ferricyanide as the electron acceptor was detected in cell extracts of A. ferrooxidans ATCC 23270 grown on
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