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157953

Sigma-Aldrich

Sodium hydrosulfite

technical grade

Synonym(s):

Sodium hypodisulfite

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About This Item

Linear Formula:
NaO2SSO2Na
CAS Number:
7775-14-6
Molecular Weight:
174.11
EC Number:
231-890-0
MDL number:
MFCD00011640
UNSPSC Code:
12352302
PubChem Substance ID:
329750858
NACRES:
NA.21
Assay:
≥82.5% (iodometric)
grade:
technical grade
form:
powder
solubility:
water: soluble(lit.)
Pricing and availability is not currently available.

grade

technical grade

Quality Level

200

Assay

≥82.5% (iodometric)

form

powder

pH

7-9 (20 °C, 50 g/L)

solubility

water: soluble(lit.)

cation traces

heavy metals: ≤0.002%

storage temp.

room temp

SMILES string

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

InChI

1S/2Na.H2O4S2/c;;1-5(2)6(3)4/h;;(H,1,2)(H,3,4)/q2*+1;/p-2

InChI key

JVBXVOWTABLYPX-UHFFFAOYSA-L

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General description

Sodium hydrosulfite (Sodium dithionite, Sodium hypodisulfite, Na2S2O4) is a white crystalline sodium salt. It decomposes in the presence of atmospheric oxygen to afford sodium hydrogen sulfate. It has been prepared by reducing sodium hydrogen sulfite in sulfurous acid solution with zinc.[1] It is widely used for the decolorization prior to dyeing of cloths in the textile industry.[2]

Application

Sodium hydrosulfite may be employed as a reducing agent for the reduction of graphite oxide in a study.[3]
Sodium hydrosulfite has been used as a fluorescent quenching agent in the encapsulation of polynucleotides via production of asymmetric nanoparticles.[4] It has also be used in the form of buffer for the elution of probe labelled proteins involved in the indentification of cellular targets of covalent kinase inhibitors via mass spectrometry method (MS).[5]

Pictograms

FlameExclamation mark
GHS02,GHS07

Signal Word

Danger

Hazard Statements

H251,H302,H319

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2 - Self-heat. 1

Supplementary Hazards

EUH031

Storage Class Code

4.2 - Pyrophoric and self-heating hazardous materials

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
SDBB2416
STBL3533
STBL4177
STBL4753
MKCW6491

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Evaluation of asymmetric liposomal nanoparticles for encapsulation of polynucleotides
Whittenton J, et al.
Langmuir, 24(16), 8533-8540 (2008)
A chemoproteomic method for identifying cellular targets of covalent kinase inhibitors
Chen C-Y and Zhang C
Genes & Cancer, 7, 148-148 (2016)
E Gabriele Panarelli et al.
Physical chemistry chemical physics : PCCP, 22(17), 9487-9493 (2020-04-22)
We report on a novel approach to the study of rates and short-lived intermediates of (bio)chemical reactions that involve paramagnetic species. Temperature-cycle Electron Paramagnetic Resonance (EPR) concerns the repeated heating of a reaction mixture in the cavity of an EPR
The preparation of high performance and conductive poly (vinyl alcohol)/graphene nanocomposite via reducing graphite oxide with sodium hydrosulfite.
Zhou T, et al.
Composites Science and Technology, 71(9), 1266-1270 (2011)
Eagleson M.
Concise Encyclopedia Chemistry, 304-304 (1994)
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Questions

1–5 of 5 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  3. What other species may be present in Product 157953, Sodium hydrosulfite?

    1 answer

    1. Sigma-Aldrich does not test for the presence or absence of impurities in this product..

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  4. What is the solubility of Product 157953, Sodium hydrosulfite?

    1 answer

    1. According to the chemicals encyclopedia published by the Royal Society of Chemistry, 12th ed., Entry# 8771, this compound is very soluble in water, and only slightly in alcohol.

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  5. What is the Department of Transportation shipping information for this product?

    1 answer

    1. Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.

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