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/418/501/product-dating-information-06-25-mk.pdf
239321
Sodium sulfite
ACS reagent, ≥98.0%
Select a Size
About This Item
Skip To
Product Name
Sodium sulfite, ACS reagent, ≥98.0%
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
grade
ACS reagent
agency
suitable for SM 5210
assay
≥98.0%
form
powder or crystals
impurities
Free acid, passes test
≤0.005% insolubles
≤0.03 meq/g Titr. free base
pH
9.0-10.5 (25 °C, 126 g/L)
solubility
water: soluble 126 g/L at 20 °C
anion traces
chloride (Cl-): ≤0.02%
cation traces
Fe: ≤0.001%
heavy metals (as Pb): ≤0.001%
Quality Level
Looking for similar products? Visit Product Comparison Guide
Related Categories
1 of 4
This Item | 31454 | 901916 | S4672 |
|---|---|---|---|
| form powder or crystals | form solid | form powder or crystals | form powder or crystals |
| assay ≥98.0% | assay 98-100.0% (iodometric) | assay ≥98% | assay ≥98% |
| solubility water: soluble 126 g/L at 20 °C | solubility - | solubility - | solubility H2O: 1 M at 20 °C, clear, colorless |
| Quality Level 200 | Quality Level 100 | Quality Level - | Quality Level 200 |
| grade ACS reagent | grade - | grade anhydrous, reagent grade | grade - |
| impurities Free acid, passes test, ≤0.03 meq/g Titr. free base, ≤0.005% insolubles | impurities ≤0.001% heavy metals (as Pb), ≤0.02% thiosulfate (S2O3) | impurities - | impurities ≤0.005% Insoluble matter, ≤5 ppm Phosphorus (P) |
Application
- As a reducing agent in the hydroxylation of arylboronic acids and arylboronic esters into corresponding phenols.
- In the transformation of α-amino alcohol methanesulfonate hydrochlorides to sodium α-amino alkanesulfonates.
- As a SO2 precursor in the multigram synthesis of DABCO·(SO2)2 abbreviated as DABSO.
General description
Storage Class
13 - Non Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
Choose from one of the most recent versions:
Already Own This Product?
Find documentation for the products that you have recently purchased in the Document Library.
Related Content
This page is intended to make it easier to find the consumables you need based on the analytical method you’re using. Methods included on this page come from the EPA, Standard Methods and ASTM.
-
How can I determine the shelf life / expiration / retest date of this product?
1 answer-
Helpful?
-
-
How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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
Helpful?
-
Active Filters
Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.
Contact Technical Service